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Effect of H2on 8YSZ Coatings Prepared by Arc Plasma Torch 认领 引用
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作者 Geng Chuanwen Zhao Peng +2 位作者 Su Yi Fan Zihao Wu Xi 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第8期1858-1864,共7页
The thermal barrier coatings(TBCs)are prepared using spraying technique of 8YSZ particles.In this process,H2is often added to the plasma torch discharge system.In order to study the effect of H2content on plasma... The thermal barrier coatings(TBCs)are prepared using spraying technique of 8YSZ particles.In this process,H2is often added to the plasma torch discharge system.In order to study the effect of H2content on plasma discharge,this study emplyed particle velocity capture diagnostics,optical emission spectroscopy,and finite element simulation to validate the relationship between H2content and coating quality.The results indicate that adding H2increases the temperature and velocity of plasma,which in turn improves the efficiency and in-flight velocity of molten 8YSZ particles.However,when the H2/(Ar+H2)is increased to 50%,the instability of arc root disturbs the arc plasma discharge,posing a challenge to maintaining the physical state of the in-flight particles.With an increase in H2flow rate,the coating quality shows a trend of first increasing and then decreasing,with the optimal flow rate ratio being H2/(Ar+H2)=37.5%.The findings of this work can serve as a theoretical guidance and reference for the preparation of TBCs via plasma. 展开更多
关键词 in-flight particles 8YSZ coatings plasma torch H2plasma
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High-temperature oxidation resistance of TiB2coatings on molybdenum produced by molten salt electrophoretic deposition 认领 引用
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作者 Qian Kou Chuntao Ge +6 位作者 Yanlu Zhou Wenjuan Qi Junjie Xu Weiliang Jin Jun Zhang Hongmin Zhu Saijun Xiao 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第1期282-291,共10页
TiB2coatings can significantly enhance the high-temperature oxidation resistance of molybdenum,which would broaden the application range of molybdenum and alloys thereof.However,traditional methods for preparing Ti... TiB2coatings can significantly enhance the high-temperature oxidation resistance of molybdenum,which would broaden the application range of molybdenum and alloys thereof.However,traditional methods for preparing TiB2coatings have disadvantages such as high equipment costs,complicated processes,and highly toxic gas emissions.This paper proposes an environmentally friendly method,which requires inexpensive equipment and simple processing,for preparing TiB2coating on molybdenum via electrophoretic deposition within Na3AlF6-based molten salts.The produced TiB2layer had an approximate thickness of 60μm and exhibited high density,outstanding hardness(38.2 GPa)and robust adhesion strength(51 N).Additionally,high-temperature oxidation experiments revealed that,at900℃,the TiB2coating provided effective protection to the molybdenum substrate against oxidation for 3 h.This result indicates that the TiB2coating prepared on molybdenum using molten salt electrophoretic deposition possesses good high-temperature oxidation resistance. 展开更多
关键词 molten salt electrophoretic deposition molybdenum TiB2coating high-temperature oxidation resistance
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Synergistic sintering and surface coating design for high-temperature wettability and interfacial reaction control of Al2O3-SiO2 ceramics in DD6 superalloy melting 认领 引用
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作者 Qian Dang Shan-Shan Wang +4 位作者 Yun-Fei Zhang Chi Zhang Wan Zhang Guo-Huai Liu Zhao-Dong Wang 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第4期303-317,共15页
To improve the melt purity of DD6 single-crystal superalloy and mitigate interfacial reactions with Al2O3-SiO2 ceramics during casting,an anti-erosion enhancement strategy that combines sintering parameter op... To improve the melt purity of DD6 single-crystal superalloy and mitigate interfacial reactions with Al2O3-SiO2 ceramics during casting,an anti-erosion enhancement strategy that combines sintering parameter optimization with surface coating modification is proposed.By systematically tailoring the sintering temperature and impregnation-coating process,Al2O3-SiO2 ceramics with both superior mechanical properties and refined surface quality were fabricated.On this basis,the high-temperature wetting behavior and interfacial reaction mechanisms between ceramics with different surface conditions and DD6 alloy melt were investigated.Results show that sintering at 1260℃ yields a dense and homogeneous microstructure with a porosity of 30.5%and a flexural strength of 12.75 MPa,ensuring thermal stability and structural integrity.The introduction of a dense Al2O3 surface coating further reduced surface porosity,suppressed melt infiltration,and retarded interfacial reactions.High-temperature melting tests revealed that the erosion layer thickness decreased from 150 to 200µm for the uncoated ceramics to~100µm for the coated one.Wetting measurements showed that the contact angle between the melt and the ceramic surface increased from 126.15°to 129.77°after coating treatment,indicating weakened wettability.Interfacial characterization confirmed the formation of HfO2 as a reaction product,evidencing a reactive wetting mechanism.Overall,the synergistic optimization of sintering parameters and surface densification significantly enhances the high-temperature corrosion resistance and service stability of Al2O3-SiO2 ceramics,offering robust engineering support for their application in clean melting of advanced superalloys. 展开更多
关键词 Al2O3-SiO2ceramics DD6 superalloy Surface coating Interfacial reaction High-temperature wettability
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Microstructure and Thermal Properties of MoSi2and Gd2Zr2O7Composite Coatings on Mo-Re Alloy 认领 引用 被引量：1
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作者 Zhang Chong Wang Xin +3 位作者 Xu Hailong Li Yanchao Ma Tongxiang Wang Shaopeng 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第2期315-321,共7页
Dual-layer thermal barrier coatings(TBCs)with ultrahigh temperature resistance were prepared on the surface of molybdenum-rhenium alloy hot-end components.The preparation of the MoSi2-Gd2Zr2O7dual-layer TB... Dual-layer thermal barrier coatings(TBCs)with ultrahigh temperature resistance were prepared on the surface of molybdenum-rhenium alloy hot-end components.The preparation of the MoSi2-Gd2Zr2O7dual-layer TBCs was designed based on the coefficient of thermal expansion and the coating functionality,and it was completed using atmospheric plasma spraying technique.The microstructure,mechanical properties,and thermal properties were analyzed.Results indicate that the adhesion of the prepared dual-layer composite TBCs is excellent,and no noticeable cracks appear at the interface.Compared with the MoSi2coating with a low fracture toughness(0.88 MPa·m1/2),the Gd2Zr2O7coating exhibits higher fracture toughness(1.74 MPa·m1/2)and stronger resistance to crack propagation.The prepared MoSi2-Gd2Zr2O7composite coatings have a high porosity(39%),low thermal conductivity(1.020 W·(m·K)−1,1200℃),and low thermal diffusivity(0.249 mm2/s,1200℃).Additionally,they possess a high oxygen-vacancy concentration,which ensures excellent insulation performance. 展开更多
关键词 MoSi2-Gd2Zr2O7coating molybdenum-rhenium alloy TBCs thermal insulation performance
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Research progress in modification of MoSi2 coatings on surface of refractory metals and their alloys:a review 认领 引用 被引量：3
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作者 Jia-Yu Han Li Wang +8 位作者 Ping Hu Bo-Liang Hu Sheng-Jie Ma Li-Li Gao Run Bai Qiang Wang Rui Feng Bo Jin Kuai-She Wang 《Rare Metals》 SCIE EI CAS CSCD 2025年第2期793-821,共29页
Refractory metals and their alloys have excellent properties such as high-temperature strength and corrosion resistance.It is widely used in aerospace,electronics industry and other fields.However,refractory alloys ar... Refractory metals and their alloys have excellent properties such as high-temperature strength and corrosion resistance.It is widely used in aerospace,electronics industry and other fields.However,refractory alloys are prone to oxidation and failure in high-temperature service environments.The preparation of a MoSi2 antioxidant coating is an effective method for improving the protective ability of refractory metals at high temperatures.However,although MoSi2 coatings have many advantages,it is difficult to meet the increasingly stringent service requirements.To address these challenges,researchers have used different elements to modify a single MoSi2 coating and improve its overall oxidation resistance.In this study,the roles of one or more elements(Si,B,N,Zr,Al,W,Hf,Y,Ti and Cr)in MoSi2 coatings are systematically reviewed.Simultaneously,the mechanism of single or multiple synergistic modification of MoSi2 coatings with different elements was discussed.Finally,the development prospects of MoSi2 coating modification of refractory metals and their alloys are discussed. 展开更多
关键词 Refractory metals MoSi2coating Doping Oxidationresistance
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Revealing the mechanism of Zr coating modification on Ni-rich cathode materials through solid-phase diffusion 认领 引用
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作者 Lingjun Li Yanjie Huang +6 位作者 Zhenxuan Liu Niu Zhao Huazhao Liang Minzheng Zhou Kangyu Zou Lei Tan Tianxiang Ning 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第7期766-772,共7页
Ni-rich layered oxides are regarded as one of the most reliable cathode materials for lithium-ion batteries.Modifying the crystal structure through doping with foreign elements and constructing surface coating layers ... Ni-rich layered oxides are regarded as one of the most reliable cathode materials for lithium-ion batteries.Modifying the crystal structure through doping with foreign elements and constructing surface coating layers are common modification methods for Ni-rich cathode materials.However,the relationship between the diffusion depth and distribution behavior of foreign elements within the cathode material and the composition of the cathode material has rarely been studied in depth.In this work,by exploring the relationship between element concentration and position in a specially prepared two-substances diffusion couple,the diffusion coefficients between Zr4+and transition metal elements TMM+(TM=Ni,Co,Mn;n=3,4)were obtained.It was found that the magnitude relationship of their diffusion coefficients is:Zr4+/Mn4+>Zr4+/Mn3+>Zr4+/Co3+>Zr4+/Ni3+.Moreover,through the Arrhenius equation,it was determined that the Zr4+/Mn4+diffusion couple has the smallest diffusion activation energy of only 0.43eV,while the Zr4+/Ni3+diffusion couple has the largest diffusion activation energy,which is 0.63 eV.In addition,this study designed a specific core-shell structure model based on the microscopic morphology of the prepared cathode precursor particles,accurately predicting the distribution differences of Zr4+in cathode materials with different compositions during the actual sintering process.This work explains the reason for the formation of a Li2ZrO3 secondary phase coating layer on the surface of Ni-rich cathode material particles from the perspective of diffusion kinetics,providing a strong theoretical basis for the future design of high-performance element-modified Ni-rich cathode materials. 展开更多
关键词 Ni-rich cathode Diffusion coefficients Diffusion activation energy Li2ZrO3coating layer Diffusion kinetics
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Influence of Ti on ternary eutectic phase structure of Zn-6Al-3Mg coating alloy under rapid cooling condition 认领 引用
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作者 Yao Liu Jing-Ke Dai +3 位作者 Qin Luo Wen-Jun Xu Yuan-Yuan Yan Guang-Xin Wu 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第6期40-55,共16页
The influence of 0.1 wt.%Ti and Ti/B on Zn-6 wt.%Al-3 wt.%Mg coating alloy during rapid cooling(50-75℃/s)was investigated.The results demonstrate a significant change in the microstructure of the alloy upon the intro... The influence of 0.1 wt.%Ti and Ti/B on Zn-6 wt.%Al-3 wt.%Mg coating alloy during rapid cooling(50-75℃/s)was investigated.The results demonstrate a significant change in the microstructure of the alloy upon the introduction of Ti or Ti/B.Al dendrites undergo a transition from slender to short and coarse,and more Al dendrites are produced.The ternary eutectic Zn/Al/Mg2Zn11phase is no longer observed,while only the ternary eutectic Zn/Al/MgZn2phase is present.The addition of Ti results in the formation of a precipitated phase consisting of TiAl3and when Ti/B is added,both TiAl3and TiB2 phases are observed to precipitate.The solid solubility of Mg in Zn can be influenced by Ti,as demonstrated through composition profile,thermodynamic calculation,and diffusion couple experiments.Zn phase nucleates as the priority phase when the eutectic phase precipitates.Due to the significant supercooling,rapid growth of Zn phase occurs,accompanied by solid dissolution of some Mg and Al into Zn phase because of insufficient time for diffusion outside.The interface of Zn phase exhibits a low concentration of Mg,resulting in the formation of Mg2Zn11nuclei.After the solid solution of Ti in Zn phase,more Mg and Al will be discharged,and MgZn2nuclei will be generated at the higher concentration of Mg at the interface of Zn phase.By elucidating the solidification mechanism,a deeper comprehension of the role of Ti in Zn-6Al-3Mg alloy can be attained. 展开更多
关键词 Zn-6 wt.%Al-3 wt.%Mg coating alloy Ti Mg2Zn11phase MgZn2phase Solid solubility Diffusion couple
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Effect of Al2O3nano sol content in Ni-Al2O3composite coating on intermetallic compound formation and properties of Mg/Al soldered joints 认领 引用 被引量：1
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作者 Yingzong Liu Yuanxing Li +2 位作者 Jinzhe Cui Zongtao Zhu Hui Chen 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第4期1784-1798,共15页
Combining Mg and Al dissimilar metals further reduces structural weight,but the formation of intermetallic compounds(IMCs)affectsAl/Mg joint properties.To prevent IMCs,a Ni-Al2O3composite coating was pre-plated ... Combining Mg and Al dissimilar metals further reduces structural weight,but the formation of intermetallic compounds(IMCs)affectsAl/Mg joint properties.To prevent IMCs,a Ni-Al2O3composite coating was pre-plated on the Mg alloy substrate,and then Sn3.0Ag0.5Cu(SAC 305)solder was utilized to facilitate the joining of AZ31 Mg/6061 Al through ultrasonic-assisted soldering.We investigated the impactof Al2O3nano sol content in the coating on microstructure evolution,IMCs formation,and mechanical properties.Results indicated that theNi-Al2O3composite coating effectively suppressed the Mg-Sn reaction,thereby preventing the formation of Mg2Sn IMC and significantlyenhancing joint strength.In joints with a Ni-Al2O3composite coating containing 50 mL/L Al2O3nano sol,no Mg2Sn IMC was detectedafter 50 min of holding at 260℃,achieving a maximum shear strength of approximately 67.2 MPa.Increasing the Al2O3concentrationfurther expanded the soldering process window.For the joint with Ni-Al2O3(100 mL/L Al2O3nano sol)composite coating held at 260℃for 70 min,the coating was dissolved to a thickness of about 5.8μm,but no Mg2Sn IMC was observed.The Ni-based solid solution formednear the coating/solder interface was strengthened,leading to fractures occurring within the SAC solder,and the maximum shear strengthfurther increased to 73.9 MPa.The strengthening mechanism of the joints facilitated by using the Ni-Al2O3composite coating was revealedby comparing with pure Ni-assisted joints.Therefore,employing a Ni-Al2O3composite coating as a barrier layer represents a promisingstrategy for inhibiting IMC formation during the joining of dissimilar metals. 展开更多
关键词 Ni-Al2O3composite coating Ultrasonic-assisted soldering Mg2Sn IMC Shear strength
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Enhanced and Tunable Visible-Light and Near-Infrared Transmittance of VO2/ATO Composite Coatings for Smart Windows 认领 引用
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作者 HAN Tao YAN Yuqing +4 位作者 WANG Yanhang YANG Penghui LI Xianzi ZHANG Rui ZU Chengkui 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第3期627-634,共8页
We synthesized tungsten-doped vanadium dioxide(W-VO2)particles via a one-step hydrothermal method,followed by their integration with antimony-doped tin oxide(ATO)nanoparticles to formulate a composite coating.Subse... We synthesized tungsten-doped vanadium dioxide(W-VO2)particles via a one-step hydrothermal method,followed by their integration with antimony-doped tin oxide(ATO)nanoparticles to formulate a composite coating.Subsequently,the VO2/ATO composite coating was fabricated through a spin-coating process.The impact of varying W-VO2 content and coating thickness on the performance of the composite coatings was systematically investigated by employing X-ray diffraction,particle size distribution analysis,spectrometry,and other pertinent test methodologies.Our findings revealed that an escalation in both W-VO2 content and coating thickness retained high transmittance in the near-infrared band at lower temperatures.However,as the temperature increased,a notable reduction in transmittance in the near-infrared band was observed,alongside a slight decrease in transmittance within the visible band.Remarkably,when the W-VO2 content reached 5%and the coating thickness was 1253 nm,the transmittance of the composite coating surpassed 80%.Furthermore,the heat insulation effect achieved a remarkable 10.0℃increase.Consequently,the synthesized composite coating demonstrates significant potential for smart glass applications,particularly in the realm of heat-insulating glass. 展开更多
关键词 VO2 ATO composite coating transmittance thermal insulation performance
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Effects of zirconia coating on improvement of sodium-ion migration in NaNi1/3Fe1/3Mn1/3O2cathodes for sodium-ion batteries 认领 引用
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作者 Wei-jia TANG Yun-jiao LI +3 位作者 Yu-ming LIU Chang-long LEI Shi-jie JIANG Zhen-jiang HE 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第12期4230-4241,共12页
To investigate the mechanism by which ZrO2modification affects the electrochemical performance of the NaNi1/3Fe1/3Mn1/3O2(NFM)cathode material for sodium-ion batteries,ZrO2-coated NFM(ZrO2@NFM)was... To investigate the mechanism by which ZrO2modification affects the electrochemical performance of the NaNi1/3Fe1/3Mn1/3O2(NFM)cathode material for sodium-ion batteries,ZrO2-coated NFM(ZrO2@NFM)was prepared via high-temperature calcination.XRD refinement results revealed that ZrO2modification increased the Na-layer spacing in the NFM material.XPS analysis results demonstrated that ZrO2modification adjusted the Mn3+/Mn4+ratio in NFM by reducing the Mn3+content.Electrochemical test results revealed that,compared to NFM,ZrO2@NFM exhibited superior rate capability and cycling stability.It also exhibited significantly enhanced Na+diffusion coefficients and reduced interfacial charge transfer resistance.The ZrO2coating increased Na-layer spacing,reduced electrochemical polarization,and inhibited side reactions.In summary,the synergistic effect of component regulation and surface engineering through ZrO2coating improved Na+diffusion kinetics and enhanced cycling stability. 展开更多
关键词 sodium-ion battery ZrO2coating layered oxide cathodes diffusion coefficient electrochemical performance
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Enhancing long-term cycling stability of spinel LiNi0.5Mn1.5O4cathode via ultrathin ZrO2coating layer 认领 引用
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作者 Jie MEI Qi-xiang XU +5 位作者 Yuan-zhi CHEN Gui-yang GAO Wan-jie XU Qing-shui XIE Lai-seng WANG Dong-liang PENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第12期4217-4229,共13页
Spinel LiNi0.5Mn1.5O4(LNMO)cathode draws significant attention in the field of energy storage due to its unique voltage plateau.To further enhance the long-term electrochemical stability of LNMO,the LNMO cath... Spinel LiNi0.5Mn1.5O4(LNMO)cathode draws significant attention in the field of energy storage due to its unique voltage plateau.To further enhance the long-term electrochemical stability of LNMO,the LNMO cathode covered with an ultrathin ZrO2layer was prepared through atomic layer deposition(ALD).It is found that the LNMO cathode deposited with 20 layers of ZrO2(LNMOZ20)exhibits the best electrochemical performance,achieving a high discharge capacity of 117.1 mA·h/g,with a capacity retention of 87.4%after 600 cycles at a current density of 1C.Furthermore,even at higher current densities of 5C and 10C,the LNMOZ20 electrode still demonstrates excellent stability with discharge capacities reaching 111.7 and 103.6 mA·h/g,and capacity retentions maintaining at 81.0%and 101.4%after 2000 cycles,respectively.This study highlights that the incorporation of an ultrathin ZrO2layer by ALD is an effective strategy for enhancing the long-term cycling stability of LNMO cathodes. 展开更多
关键词 spinel LiNi0.5Mn1.5O4 ZrO2coating high-voltage cathode atomic layer deposition cathode electrolyte interphase film
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Erosion Resistance and Damage Evolution of Ti-doped Ta2O5High-Transmittance Coatings 认领 引用
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作者 Chao Rui Ye Borui 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2025年第8期1988-1996,共9页
To verify the wear resistance and erosion resistance of Ti-doped Ta2O5coating(TTO),a series of TTOs were prepared by magnetron sputtering technology by controlling the power of the Ti target.The change of growth... To verify the wear resistance and erosion resistance of Ti-doped Ta2O5coating(TTO),a series of TTOs were prepared by magnetron sputtering technology by controlling the power of the Ti target.The change of growth structure,microstructure,and tribological properties of TTOs with Ti target power was studied.After the erosion test,the variation of erosion damage behavior of TTOs with mechanical properties under different erosion conditions was further studied.The results show that the TTOs eliminate the roughness,voids,and defects in the material due to the mobility of the adsorbed atoms during the growth process,and a flat and dense smooth surface is obtained.Tribological tests show that the TTOs are mainly characterized by plastic deformation and microcrack wear mechanism.Higher Ti target power can improve the wear resistance of TTOs.Erosion test results reveal that the impact crater,furrow,micro-cutting,brittle spalling,and crack formation are the main wear mechanisms of the TTOs samples under erosion conditions. 展开更多
关键词 Ti-Ta2O5coatings microstructure tribological properties erosion behavior damage law
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Elemental migration motivating efficient carrier transportation in Sb2Se3solar cells with spin-coated CdS film 认领 引用
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作者 Weihuang Wang Weiyu Wang +8 位作者 Junjie Lin Zixian Cai Nuoyan Sun Ye Huang Qiqiang Zhu Qiao Zheng Jionghua Wu Hui Deng Shuying Cheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期110-120,I0004,共11页
Sb2Se3 has been developing as one of the most excellent new emerging candidates for photovoltaic devices.However,the knock-on negative effect induced by the unideal quality of the CdS contacting layer largely re... Sb2Se3 has been developing as one of the most excellent new emerging candidates for photovoltaic devices.However,the knock-on negative effect induced by the unideal quality of the CdS contacting layer largely restricts the power conversion efficiency(PCE) of Sb2Se3 thin film solar cells,especially for the vacuum-processed ones.Herein,to improve the carrier transportation of the CdS Sb2Se3 interface and the PCE of Sb2Se3 solar cells,distinguished from the traditional chemical bath deposition(CBD) method,a spin-coated CdS film was adopted as the contacting layer for the Sb2Se3 thin film.The results revealed that the spin-coated CdS film possesses better crystallinity and conductivity than CBD-CdS films,which not only can induce better [hk1] orientated Sb2Se3 film but also contribute to the spike-like bandgap alignment of CdS/Sb2Se3 interface.Therefore,the defect level and concentration in Sb2Se3 solar cells were greatly reduced.Interestingly,the elemental migration during the post-annealing process can further optimize the heterojunction quality,the crystallinity,and vertical growth of Sb2Se3 films and covert Vse1 defects into Sbse3 defects with lower concentration,leading to the widened depletion region,decreased defect concentration,enhanced carrier lifetime,and built-in voltage for the Sb2Se3 device.The vapor transport deposition(VTD)-processed Sb2Se3 solar cells achieved a remarkable enhancement of 63.5% in PCE compared to devices based on CBD-derived CdS films,reaching a champion PCE of8.65% with a Voc of 0.42 V,Jsc of 32.33 mA/cm2,and FF of 63.68%-the highest reported PCE for Sb2Se3solar cells based on spin-coated CdS films to date.The results shed new light on solution-processed CdS films for fabricating high-efficiency Sb2Se3 solar cells,and highlighted the critical role of selfpassivation induced by elemental migration during the post-annealing process. 展开更多
关键词 Sb2Se3 CdS Spin‑coating Band alignment Growth orientation
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Synergistic aluminum lattice doping and surface coating for high-performance Co-free Ni-rich cathodes 认领 引用
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作者 Lang Wen Liang Shan +4 位作者 Yunhan Hu Yiyong Zhang Wen Lu Wen-Hua Zhang Junqiao Ding 《Journal of Semiconductors》 EI CAS CSCD 2026年第5期53-64,共12页
LiNi0.9Mn0.1O2(LNM91)is a promising cobalt-free,high-energy cathode material for next-generation lithium-ion batteries,but its commercialization is challenged by rapid capacity fading resulting from bulk and ... LiNi0.9Mn0.1O2(LNM91)is a promising cobalt-free,high-energy cathode material for next-generation lithium-ion batteries,but its commercialization is challenged by rapid capacity fading resulting from bulk and interfacial structural degradation.Herein,an in situ surface-to-bulk dual-modification strategy is developed to synthesize 6Al-LNM91(6 mol%Al modified LNM91)via a one-step calcination process based on Al diffusion chemistry.This method concurrently constructs a protective LiAlO2coating and incorporates Al3+into the bulk lattice,effectively enhancing the structural integrity of the cathode during cycling.The optimized 6Al-LNM91 cathode delivers a remarkable rate capability of 165 mA··h·g-1at 10 C and maintains 94.03%capacity retention after 120 cycles at 0.5 C(2.8-4.4 V),substantially outperforming the pristine material(76.82%of LNM91).This organic solvent-free,single-step modification approach offers a scalable and efficient route for improving high-nickel layered oxide cathodes. 展开更多
关键词 in situ dual modification Al doping LiAlO2coating cobalt-free nickel-rich cathode LiNi0.9Mn0.1O2
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Improving the oxidation resistance of HfB2-SiC coatings on carbon/carbon composites by CeO2 doping 认领 引用 被引量：1
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作者 HE Chang-lin SHANG Zhi-chao +10 位作者 WANG Wei-guang LI Xiang-ming WANG Kun CHEN Yue-xing BAI Xin-tan WANG Pei-pei JI Xiang REN Xuan-ru Evgeny A Levashov Ph V Kiryukhantsev-Korneev FENG Pei-zhong 《新型炭材料（中英文）》 SCIE EI CAS CSCD 北大核心 2025年第3期688-702,共15页
To improve the oxidation resistance of HfB2-SiC coatings on carbon/carbon composites at 1700°C in air,CeO2 was introduced to improve oxygen blocking and its mechanism was investigated.During the rapid oxida... To improve the oxidation resistance of HfB2-SiC coatings on carbon/carbon composites at 1700°C in air,CeO2 was introduced to improve oxygen blocking and its mechanism was investigated.During the rapid oxidation stage,CeO2 accelerated the formation of a multiphase glass layer on the coating surface.The maximum oxidation rates of CeO2-HfB2-SiC coatings with 1%,3%,and 5%CeO2 were 24.1%,20.3%,and 53.2%higher than that of the unmodified HfB2-SiC coating,respectively.In the stable oxidation stage,the maximum oxidation rates of coatings with 1%and 3%CeO2 decreased by 31.4%and 21.9%,respectively,demonstrating adequate inert protection.CeO2 is a“coagulant”and“stabilizer”in the composite glass layer.However,increasing the CeO2 content accelerates the reaction between the SiO2 glass phase and SiC,leading to a higher SiO2 consumption and reduced self-healing ability of the glass layer.The 1%CeO2-60%HfB2-39%SiC coating showed improved glass layer viscosity and stability,moderate SiO2 consumption,and better self-healing ability,significantly boosting the oxidation protection of the coating. 展开更多
关键词 HfB2-SiC coatings CeO2 Oxidation resistance Self-healing ability Mechanism
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Biocompatible and Antibacterial PCL-TiO2@Ag/γ-CD MOF Nanocomposite Coating for Corrosion Resistance of Magnesium Alloy in Simulated Body Fluid 认领 引用 被引量：1
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作者 Sara Dehghan-Chenar Hamid R.Zare +1 位作者 Zahra Mohammadpour Maryam Sadat Mirbagheri-Firoozabad 《电化学（中英文）》 CAS 北大核心 2025年第11期82-98,共17页
Magnesium alloys are promising candidates for bio-implant applications due to their biodegradability and biocompati-bility.However,their rapid corrosion remains a critical limitation.This study presents the developmen... Magnesium alloys are promising candidates for bio-implant applications due to their biodegradability and biocompati-bility.However,their rapid corrosion remains a critical limitation.This study presents the development of a multifunctional nanocomposite coating designed to enhance the corrosion resistance and antibacterial properties of magnesium alloy im-plants.The coating comprisedγ-cyclodextrin metal-organic frameworks(γ-CD MOFs)decorated with TiO2@Ag core-shell nanoparticles,embedded in a polycaprolactone(PCL)matrix.Immersion tests in a simulated body fluid(SBF)revealed an initially higher corrosion rate for the PCL-TiO2@Ag/γ-CD MOF coating compared to the coating without TiO2@Ag nanopar-ticles;however,it demonstrated significant improvement over time.After five days,the corrosion inhibition reached 95.44%,with the corrosion rate decreasing to 1.70 mpy.Additionally,the composite coating exhibited strong antibacterial activity against Escherichia coli,Pseudomonas,and Staphylococcus aureus.Furthermore,MTT assays indicated that the coating facili-tated the growth and proliferation of osteoblast-like MC3T3-E1 cells,confirming its nontoxicity and biocompatibility.These findings highlight the potential of the PCL-TiO2@Ag/γ-CD MOF nanocomposite as a biocompatible,antibacterial,and cor-rosion-resistant coating for biodegradable magnesium implants,offering a promising solution for biomedical applications. 展开更多
关键词 Antibacterial coating Biocompatible Anti-corrosion coating γ-CD metal-organic framework TiO2@Ag core shell
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Optimization of laser cladding FeMnSiCrNi memory alloy coating process based on response surface model and NSGA-2 algorithm 认领 引用 被引量：1
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作者 Yu Zhang Guang-lei Liu +4 位作者 Shu-cong Liu Wen-chao Xue Wei-mei Chen Hai-xia Liu Jian-zhong Zhou 《China Foundry》 SCIE EI CAS CSCD 2025年第3期311-322,共12页
To solve the problems of deformation,micro-cracks,and residual tensile stress in laser cladding coatings,the technique of laser cladding with Fe-based memory alloy can be considered.However,the process of in-situ synt... To solve the problems of deformation,micro-cracks,and residual tensile stress in laser cladding coatings,the technique of laser cladding with Fe-based memory alloy can be considered.However,the process of in-situ synthesis of Fe-based memory alloy coatings is extremely complex.At present,there is no clear guidance scheme for its preparation process,which limits its promotion and application to some extent.Therefore,in this study,response surface methodology(RSM)was used to model the response surface between the target values and the cladding process parameters.The NSGA-2 algorithm was employed to optimize the process parameters.The results indicate that the composite optimization method consisting of RSM and the NSGA-2 algorithm can establish a more accurate model,with an error of less than 4.5%between the predicted and actual values.Based on this established model,the optimal scheme for process parameters corresponding to different target results can be rapidly obtained.The prepared coating exhibits a uniform structure,with no defects such as pores,cracks,and deformation.The surface roughness and microhardness of the coating are enhanced,the shaping quality of the coating is effectively improved,and the electrochemical corrosion performance of the coating in 3.5%NaCl solution is obviously better than that of the substrate,providing an important guide for engineering applications. 展开更多
关键词 laser cladding shape memory alloy coating response surface method process parameters optimization NSGA-2 algorithm
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Effect of CeO2content on the corrosion resistance of nano-structured Al2O3-10 wt.%TiO2ceramic coatings 认领 引用 被引量：1
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作者 Bo Tan Wenjing Chen +2 位作者 Tao Cao Chen Yang Qingsong Luo 《China Welding》 CAS 2025年第2期139-148,共10页
Nanostructured Al2O3-10wt.%TiO2-nCeO2ceramic coatings(where n is 0 wt.%,0.2 wt.%,0.5 wt.%,and 0.8 wt.%)were prepared on a 304 stainless steel substrate using atmospheric plasma spraying.The phase compositi... Nanostructured Al2O3-10wt.%TiO2-nCeO2ceramic coatings(where n is 0 wt.%,0.2 wt.%,0.5 wt.%,and 0.8 wt.%)were prepared on a 304 stainless steel substrate using atmospheric plasma spraying.The phase composition and microstructure of the coatings were characterized using an X-ray diffractometer and a scanning electron microscope.The corrosion resistance of the coatings was as-sessed through electrochemical experiments and chloride ion corrosion tests.The results indicated that the coatings comprised both partially and fully melted regions,with spherical particles and pores present on the coating surfaces.The incorporation of CeO2en-hanced the melting of the sprayed powder during the spraying process.When the CeO2content was 0.2 wt.%,the melting of the sprayed powder was optimal.The porosity of the coating was minimized to 2.45%.CeO2also positively influenced the grain refine-ment of the coating;at 0.2 wt.%CeO2,the grain size was at its minimum.The grain size of this coating was calculated to be 21.135 nm using the Scherrer formula.This coating demonstrated the best corrosion resistance,with a corrosion potential of-596.31 mV and a corrosion current density of 1.65×10-6A/cm2,resulting in a weight loss of 0.0170 g due to chloride ion corrosion. 展开更多
关键词 Plasma spraying Nanostructured ceramic coatings CeO2 Corrosion resistance
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Optimizing processing parameters for fabricating Ni/SiO2 coatings with enhanced superhydrophobicity and corrosion resistance via a one-step electrodeposition method 认领 引用
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作者 Yang Ni Hua-wei Yin +4 位作者 Yin-qiu Luo Xin-yue Li Hao Tan Ting-zhen Li Chuan-bo Hu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第5期1263-1274,共12页
Building a superhydrophobic coating on a carbon steel substrate is an effective strategy for enhancing metal protection.A practical approach to producing a series of superhydrophobic Ni/SiO2composite coatings(SSN)u... Building a superhydrophobic coating on a carbon steel substrate is an effective strategy for enhancing metal protection.A practical approach to producing a series of superhydrophobic Ni/SiO2composite coatings(SSN)using one-step electrodeposition method is shown.The effect of processing parameters on surface structure and wettability was thoroughly explored,resulting in the identification of three typical surface morphologies.The prepared coating with petal-like structure(SSN-3)obtained under the optimum parameters exhibited the best water repellency,achieving a contact angle of 162.7°and a sliding angle of 4.1°.The droplet bouncing behavior on SSN coatings surface was studied,and the delayed icing time was recorded.Meanwhile,the mechanical stability and chemical corrosion resistance of SSN coatings were focused.The superhydrophobic SSN-3 coating with unique surface structure exhibited excellent reliability.The anticorrosion mechanism of SSN-3 coating was discussed,and its corrosion protection efficiency was up to 98.5%.The superior properties of the superhydrophobic SSN-3 coating make it suitable for diverse applications. 展开更多
关键词 Superhydrophobic coating Ni/SiO2 One-step electrodeposition Mechanical stability Anticorrosion
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Corrosion resistance of self-healing three-dimensional Ti/Al-doped TiO2nanotubes Ti3AlC2coating deposited by magnetron sputtered on copper 认领 引用
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作者 WANG Guo-qing WANG Ning +5 位作者 HU Yi-teng WANG Jing GAO Chuan-hui WANG Jie XUE Jun-jie YAN Ke-xin 《Journal of Central South University》 SCIE EI CAS CSCD 2025年第3期867-881,共15页
Copper is a versatile material,commonly utilized in power transmission and electronic devices,but its relative high reactivity necessitates a long-lasting protective technique.Here,we report a method that combines pla... Copper is a versatile material,commonly utilized in power transmission and electronic devices,but its relative high reactivity necessitates a long-lasting protective technique.Here,we report a method that combines plasma-enhanced non-equilibrium magnetron sputtering physical vapor deposition(PEUMS-PVD)and anodization to construct a self-healing three-dimensional Ti/Al-doped TiO2nanotubes/Ti3AlC2coating on the surface of Cu substrates.This novel strategy enhances the corrosion resistance of copper substrates in marine environments,with corrosion current densities of up to 4.5643×10−8A/cm2.Among them,the doping of nano-aluminum particles makes the coating self-healing.The mechanistic analysis of the corrosion behaviors during early immersion experiments was conducted using electrochemical noise,and revealed that during the initial stages of coating immersion,uniform corrosion predominates,with a minor occurrence of localized corrosion. 展开更多
关键词 magnetron sputtering TiO2nanotubes Ti3AlC2coating corrosion resistance performance
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