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In situ preparation of nano cone-like structures on 3D printed titanium alloy implants via one-step femtosecond laser manufacturing for better osseointegration,anti-corrosion,and anti-fatigue 认领 引用 被引量：5
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作者 Yazhou Hu Hongshui Wang +5 位作者 Donghui Wang Xiaomei Xia Ning Liu Tai Yang Baoe Li Chunyong Liang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第3期88-99,共12页
The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step... The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step femtosecond laser treatment to improve the surface conditions and osteointegration.The surface characterization,mechanical properties,corrosion resistance,and biological responses were investigated.These results found that femtosecond laser eliminated defects like embedded powders and superficial cracks while forming the nano cones-like structures surface on 3DPT,leading to enhanced osseointegration,anti-corrosion,and anti-fatigue performance.Molecular dynamics simulations revealed the ablation removal mechanism and the formation of nano cone-like structures.These findings were further supported by the in vivo studies,showing that the FS-treated implants had superior bone-implant contact and osseointegration.Hence,the one-step femtosecond laser method is regarded as a promising surface modification method for improving the functional performance of Ti-based orthopedic implants. 展开更多
关键词 3D printed Femtosecond laser Surface modification Microanostructure Osseointegration
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Effect of hot rolling treatment on microstructure, mechanical, and corrosion properties of Zr–Sn–Co ternary alloys 认领 引用 被引量：1
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作者 Chao-qun Xia Hong-pu Zhou +3 位作者 Tian-shuo Song Shu-guang Liu Tai Yang Qiang Li 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第5期1382-1395,共14页
The microstructure,mechanical properties,and corrosion resistance of as-cast Zr–Sn–Co ternary alloys have been investigated in this experiment.The properties of as-cast Zr–1.5Sn–xCo(x=0,2.5,5,7.5,and 10 at.%)terna... The microstructure,mechanical properties,and corrosion resistance of as-cast Zr–Sn–Co ternary alloys have been investigated in this experiment.The properties of as-cast Zr–1.5Sn–xCo(x=0,2.5,5,7.5,and 10 at.%)ternary alloys were investigated,and the alloy composition exhibiting the best comprehensive performance was identified.Subsequently,the chosen alloys were subjected to hot rolling treatment.The microstructure of the alloys in the rolled state was analyzed using the optical microscope,X-ray diffractometer,and scanning electron microscope.The mechanical properties of the alloys were analyzed using room temperature compression tests and microhardness tests,while the corrosion properties of the alloy were investigated through electrochemical testing.The results show that the strength of as-cast Zr–1.5Sn–Co ternary alloy increases significantly with the increase in Co content.The incorporation of Co element makes the corrosion resistance of as-cast Zr–1.5Sn–Co alloy increase significantly.The hot rolling treatment has minimal effect on enhancing the corrosion resistance of Zr–1.5Sn–2.5Co alloy.However,the mechanical properties of Zr–1.5Sn–2.5Co alloy after rolling treatment are significantly enhanced.The alloy exhibits the highest strength and hardness at a rolling temperature of 600℃ and exhibits the best plasticity at a rolling temperature of 800℃. 展开更多
关键词 Zirconium alloy Hot rolling Microstructure Mechanical property Corrosion resistance
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Microstructural evolution,mechanical properties,and corrosion behavior of hot-rolled Ti-Zr-Al-Sn alloys 认领 引用
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作者 Chao-qun Xia Hang-ming Hu +6 位作者 Xing Zhang Ran Jing Shu-guang Liu Bo-han Chen Ning Liu Tai Yang Qiang Li 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第12期4454-4471,共18页
A systematic study was conducted on the microstructure,mechanical properties,and corrosion resistance of Ti-20Zr-xAl-2.5Sn(x=5,7,9,11,and 13 wt.%)quaternary alloy.The microstructure of the rolled alloys was characteri... A systematic study was conducted on the microstructure,mechanical properties,and corrosion resistance of Ti-20Zr-xAl-2.5Sn(x=5,7,9,11,and 13 wt.%)quaternary alloy.The microstructure of the rolled alloys was characterized by optical microscopy,X-ray diffraction,scanning electron microscopy,and transmission electron microscopy.The mechanical properties were analyzed through tensile tests,microhardness tests,and friction wear tests.Corrosion performance was evaluated using electrochemical tests,and X-ray photoelectron spectroscopy was employed to analyze the passivation film on the alloy surface.The results show that increasing Al content improves the mechanical properties of the alloy,but excessive Al leads to the creation of Ti3Al,resulting in a substantial deterioration of the mechanical characteristics of the alloy.The alloy with 7 wt.%Al exhibited the best overall mechanical properties.Electrochemical experiments revealed that higher Al content positively affected the corrosion resistance,with the alloy containing 7 wt.%Al showing the best corrosion resistance,followed by a slight decline.A small amount of Al2O3in the passivation film enhanced the corrosion resistance,but the formation of Al2O3with higher Al content decreased the corrosion performance. 展开更多
关键词 Ti-Zr alloy Hot rolling Microstructure Mechanical property Corrosion behavior
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Encapsulating Ru doped Co/CO2P nanoparticles into delignified and TEMPO oxidized wood carbon enabling efficient pH-universal hydrogen evolution reaction 认领 引用
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作者 Jiahui Li Peng Huang +5 位作者 Zhijie Zhang Cuihua Tian Yu Liao Tai Yang Yan Qing Yiqiang Wu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期452-461,共10页
High-performance catalyst is significant for the sustainable hydrogen(H2)production by electrocatalytic water splitting.Optimizing porous structure and active groups of substrate can promote the interaction of subs... High-performance catalyst is significant for the sustainable hydrogen(H2)production by electrocatalytic water splitting.Optimizing porous structure and active groups of substrate can promote the interaction of substrate and active metal particles,enabling excellent catalytic properties and stability.Herein,the optimization strategy of delignification and 2,2,6,6-tetramethylpyperidine-1-oxyl(TEMPO)oxidization was developed to modify the porous structure and active groups of wood substrate,and Ru doped Co/CO2P(Ru-Co/CO2P)nanoparticles were encapsulated into the optimized wood carbon substrate(Ru-Co/CO2P@TDCW)for the efficient pH-universal hydrogen evolution reaction(HER).The nanopore and carboxyl groups were produced by delignification and TEMPO oxidation,which accelerated the dispersion and deposition of Ru-Co/CO2P nanoparticles.The RuCo alloy and RuCoP nanoparticles were produced with the doping of Ru,and more Ru-Co/CO2P nanoparticles were anchored by the delignified and TEMPO oxidized wood carbon(TDCW).As anticipated,the Ru-Co/CO2P@TDCW catalyst exhibited excellent pH-universal HER activity,and only 16.6,93,and 43 mV of overpotentials were required to deliver the current density of 50 mA cm-2in alkaline,neutral,and acidic electrolytes,outperforming the noble Pt/C/TDCW catalyst significantly.In addition,Ru-Co/CO2P@TDCW catalyst presented excellent stability for more than 600 h working at 100 mA cm-2in alkaline solution(1.0 M KOH).Density function theory(DFT)results revealed that energy barriers for the dissociation of H2O and the formation of H2were decreased by the doping of Ru,and the conductivity and efficiency of electron migration were also enhanced.This work demonstrated a strategy to optimize the structure and properties of wood carbon substrate,providing a promising strategy to synthesize high-efficiency catalyst for H2production. 展开更多
关键词 Carbonized wood substrate Delignification TEMPO oxidization Hydrogen evolution reaction DFT calculation
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坚硬顶板特厚冲击煤层智能高效安全开采关键技术 认领 引用 被引量：10
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作者 于斌 孟祥斌 +6 位作者 邰阳 尚子榆 彭明贤 匡铁军 郭飞龙 李东印 王世博 《煤炭学报》 EI CAS CSCD 北大核心 2025年第1期245-263,共19页
针对坚硬顶板特厚冲击煤层难以实现源头消冲和高效开采的难题,首先开发了坚硬顶板特厚冲击煤层安全开采保障技术,为智能放煤高效开采创造了有利环境;在此基础上攻克智能放煤技术瓶颈,形成了坚硬顶板特厚冲击煤层智能高效开采技术,具体... 针对坚硬顶板特厚冲击煤层难以实现源头消冲和高效开采的难题,首先开发了坚硬顶板特厚冲击煤层安全开采保障技术,为智能放煤高效开采创造了有利环境;在此基础上攻克智能放煤技术瓶颈,形成了坚硬顶板特厚冲击煤层智能高效开采技术,具体研究过程如下:在坚硬顶板特厚冲击煤层安全开采保障技术方面,采用Timoshenko梁理论建立了坚硬顶板周期破断弹性能集聚模型,分析了不同单轴抗拉强度下顶板能量密度分布规律,揭示了基于地面预制人工缝网的坚硬顶板特厚冲击煤层超前消冲机理,据此开发了地面水平井压裂技术和地面液体炸药爆破技术,形成了基于地面预制人工缝网的超前消冲技术;采用Reissner中厚板理论建立了坚硬顶板切顶前后的初次破断力学模型,分析了人工定向裂缝对顶板弹性能密度和煤体静载增量的影响规律,揭示了基于井下人工定向造缝的坚硬顶板特厚冲击煤层超前消冲机理,发明了复合爆破定向造缝技术,形成了基于井下人工造缝的超前消冲技术。在坚硬顶板特厚冲击煤层智能高效开采技术方面,发明了顶煤厚度雷达在线探测技术、基于近红外光谱的煤矸识别技术、基于振动特征辨识的煤矸识别技术、基于音频的煤矸识别技术和基于激光三维扫描的放煤量实时监测技术,形成了特厚煤层智能感知与识别技术;建立了智能综放工作面“人-机-环”多源信息数据库,开发了特厚煤层综放工作面采放协调决策模型,发明了智能放煤模式与工艺智能决策技术,形成了智能放煤模式与工艺智能决策技术;开发了智能综放工作面三机位姿高精度惯导检测与控制技术,建成了智能综放远程通信及综合控制平台,形成了特厚煤层远程放顶煤智能控制技术。基于以上研究得出:①当抗拉强度分别为0.76、1.57、2.68、3.95和5.68 MPa时,坚硬顶板对应的弹性能密度峰值分别为6.5、25.4、71.6、168.2和340.1 kJ/m,弹性能密度峰值Umaxe与坚硬顶板抗拉强度σ0呈现二次函数关系,具体关系为Umaxe=10.715σ02-0.718σ0。②定向人工裂缝改变的坚硬顶板的边界条件,以兖矿能源集团103上02工作面为例,理论上人工缝网使得工作面砂岩层的初次破断步距从250 m减小为123 m。③基于地面预制人工缝网的超前消冲机理:大量人工缝网在岩层中形成结构弱面,有效降低了坚硬顶板弹性能集聚量,削弱顶板破断产生的矿震强度,从而控制了工作面及巷道内的冲击地压;基于井下人工定向裂缝的超前消除机理:定向裂缝能降低甚至消除坚硬顶板在巷道附近的弹性能,同时减小切顶侧的静载增量,从而控制了巷道内的冲击地压。 展开更多
关键词 坚硬顶板 冲击地压 智能识别与控制 源头消冲 地面压裂
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特厚煤层坚硬顶板多场耦合致灾机理及协同控制技术 认领 引用 被引量：5
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作者 于斌 王希廷 +4 位作者 邰阳 卢国志 夏彬伟 匡铁军 霍丙杰 《煤炭科学技术》 EI CAS CSCD 北大核心 2025年第8期1-16,共16页
针对特厚煤层综放开采过程中坚硬顶板大跨度破断诱发的强矿压、瓦斯等多重灾害耦合难题,通过理论分析、试验研究与工程实践相结合,系统揭示了坚硬顶板多场耦合致灾机理,提出了远近场协同控制技术及特厚煤层坚硬顶板-瓦斯协同控制技术。... 针对特厚煤层综放开采过程中坚硬顶板大跨度破断诱发的强矿压、瓦斯等多重灾害耦合难题,通过理论分析、试验研究与工程实践相结合,系统揭示了坚硬顶板多场耦合致灾机理,提出了远近场协同控制技术及特厚煤层坚硬顶板-瓦斯协同控制技术。基于不同应力路径力学试验,阐明了阶梯循环动载下煤岩强度弱化与裂隙动态扩展规律,揭示了坚硬顶板覆岩采动裂隙“三带”递进演化特征及其分形维数“S”形增长模式。通过构建“应力-损伤-渗流”多场耦合模型,探明了采动裂隙网络内瓦斯运移与孔隙率动态响应的非线性关联,提出了煤体变形与瓦斯渗流耦合控制方程。创新性研发链臂锯切顶定向弱化技术与地面水力压裂远场预裂技术,形成了特厚煤层坚硬顶板-瓦斯协同控制技术,破解了传统单一灾害治理效率低的技术瓶颈。通过塔山煤矿现场实践表明:地面压裂后支架最大工作阻力降低16.9%,周期来压步距缩短15%;通过“一井双控”技术实现顶板弱化与瓦斯抽采协同调控,工作面推进至超过钻孔50~100m后,地面钻孔抽采效果逐渐减弱。地面垂直立孔配合地面水平压裂井抽采瓦斯,可有效解决8204工作面瓦斯问题,将工作面回风流瓦斯浓度控制在安全范围以内。 展开更多
关键词 特厚煤层 坚硬顶板 地面压裂 多场耦合 协同控制
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急倾斜夹持煤体承载特征及地面斜井压裂防冲方法 认领 引用 被引量：2
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作者 于斌 李勇 +8 位作者 彭明贤 高瑞 杨文连 李明 邰阳 尚子榆 丁俊 苗伟东 赵鸿杰 《煤炭学报》 EI CAS CSCD 北大核心 2025年第6期2773-2788,共16页
我国西北部地区作为“一带一路”沿线的重要枢纽,同时作为国家煤炭资源的主产区,其能源安全保障意义重大。受复杂地质构造演化影响,该区域广泛发育急倾斜煤层。独特的地质赋存条件导致这类煤层开采过程中形成特殊的顶底板“夹持”结构,... 我国西北部地区作为“一带一路”沿线的重要枢纽,同时作为国家煤炭资源的主产区,其能源安全保障意义重大。受复杂地质构造演化影响,该区域广泛发育急倾斜煤层。独特的地质赋存条件导致这类煤层开采过程中形成特殊的顶底板“夹持”结构,采场冲击地压灾害频发。然而,当前对“夹持”作用下煤体应力与能量分布仍缺乏定量分析,现有防治技术存在明显局限。为此,构建了基于Timoshenko梁理论的急倾斜悬臂顶板弹性支撑力学模型,结合Winkler弹性地基支撑力与挠度的定量关系,推导出煤体荷载与能量分布解析式,量化分析了顶板悬臂长度、厚度及倾角对两者的影响。创新提出了地面斜井区域压裂改造“夹持”结构、调控应力环境的冲击地压防治新方法,初步明确了该方法的防冲机理与效果。研究表明:煤体荷载与能量峰值随顶板悬臂长度和厚度的增加显著提升。悬臂长度由15m增至45m,煤体峰值荷载增长13倍,能量增加168倍;顶板厚度由10m增至22m,荷载与能量峰值分别增至11.5×109N和3.9×1010J,且峰值位置向远离煤壁端偏移。相比之下,岩层倾角对煤体荷载与能量分布影响较小。地面斜井区域压裂通过构建网格化裂缝,将完整顶板分割为规则岩段,使覆岩运动模式由传统悬顶结构周期性破断转变为压裂岩段沿裂缝面滑移失稳,从根本上弱化了顶底板对煤层的“夹持”作用,并将顶板破断动载由突发性冲击转变为渐进式释放,有效削弱了冲击地压风险。压裂后形成“采动-压裂”协同破裂效应,使致冲关键层提前破断,消除大跨度悬顶结构,缩短悬顶时间,煤层剪切应力峰值降低41.9%。此外,压裂裂缝的“通道”效应促进覆岩裂隙发育高度增加31.4m,垮落矸石量增多,碎胀性作用下采空区充填质量增强,形成更稳定的“矸石-顶板”承载体系,有效抑制顶板弯曲变形,促使覆岩应力通过矸石向底板岩体转移。 展开更多
关键词 急倾斜煤层 冲击地压 煤体荷载与能量 地面斜井区域压裂 覆岩裂隙
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从肾虚血瘀论治男性性功能障碍验案三则 认领 引用
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作者 邰杨 金悦 +1 位作者 周琳 陶方泽 《中国医药导刊》 2025年第8期863-867,共5页
男性性功能障碍是男科常见疾病,涉及早泄、勃起功能障碍、睡眠相关性痛性勃起等诸多疾病,临床表现各不相同,但都严重影响患者的生活质量和心理健康。男性性功能障碍患者常因讳疾忌医,多导致病程漫长,病情纠缠难愈,临床可表现出肾虚、血... 男性性功能障碍是男科常见疾病,涉及早泄、勃起功能障碍、睡眠相关性痛性勃起等诸多疾病,临床表现各不相同,但都严重影响患者的生活质量和心理健康。男性性功能障碍患者常因讳疾忌医,多导致病程漫长,病情纠缠难愈,临床可表现出肾虚、血瘀、肝郁、湿热等诸多证候,亦可无证可辨。陶师得曾庆琪教授诊治男科疾病之精髓,同时结合临床实际,总结经验,提出肾虚与血瘀是男性性功能障碍之根本,临证时需以肾虚血瘀为眼,以补肾益精药配以活血药,灵活运用补肾活血之法,方为正途。陶师临床诊治能够从整体入手,辨证论治,抓住重点,兼顾他证,为男性性功能障碍患者的治疗提供了思路与方法。 展开更多
关键词 男性性功能障碍 男科疾病 补肾活血法 肾虚血瘀证 验案
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Structure optimal design research on backfill hydraulic support 认领 引用 被引量：9
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作者 ZHANG Qiang ZHANG Ji-xiong +2 位作者 QI Wen-yue ZHOU Nan TAI Yang 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第7期1637-1646,共10页
Backfill hydraulic support is the key equipment in achieving coal mining and solid backfilling simultaneously in solid backfill mining technology.Based on the summary and analysis of main types,basic structural proper... Backfill hydraulic support is the key equipment in achieving coal mining and solid backfilling simultaneously in solid backfill mining technology.Based on the summary and analysis of main types,basic structural properties and filed application of backfill hydraulic support,this work has firstly proposed the basic principle of backfill hydraulic support optimization design and provided the method of optimal design of key structural components,like four-bar linkage,rear canopy and tamping structure;the method is further elaborated as changing hinging position of upper bar to optimize four-bar linkage,by lengthening or shortening the rear canopy to optimize length ratio of canopy;and by changing length and hinging position of tamping structure as well as suspension height of backfill scrape conveyor to realize optimization of tamping structure.On this basis,the process of optimal design of backfill hydraulic support is built.The optimal design case of ZC5200/14.5/30 six columns-four bar linkage used in 7203 W workface of Zhaizhen Coal Mine shows that the backfill properties like horizontal roof gap,vertical horizontal gap,tamping angle and tamping head gap are improved obviously through optimizing four-bar linkage,canopy length and tamping structure according to the optimal design method proposed in this work. 展开更多
关键词 backfill hydraulic support structure optimal design four-bar linkage rear canopy tamping structure
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Preparation and surface modification of 3D printed Ti-6Al-4V porous implant 认领 引用 被引量：11
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作者 Chun-Yong Liang Xiao-Jing Jiang +5 位作者 Rui-Long Ji Bao-E Li Xian-Rui Zou Hong-Shui Wang Jing-Zu Hao Tai Yang 《Rare Metals》 SCIE EI CAS CSCD 2021年第5期1164-1172,共9页
Three-dimensional(3D)printed titanium alloy implants hold enormous potential in orthopedic applications to avoid stress shielding.However,titanium alloy is bioinert,limiting its application and making surface modifica... Three-dimensional(3D)printed titanium alloy implants hold enormous potential in orthopedic applications to avoid stress shielding.However,titanium alloy is bioinert,limiting its application and making surface modification a necessity.In this paper,porous implants were treated by acid etching and anodizing to improve the bioactivity,which was evaluated by simulated body fluid(SBF)immersion test.The results showed that,after surface modification,micro-nanocomposite structures were obtained on the titanium surface,and after immersing in SBF for 2 weeks,the implants showed a drastically enhanced apatite forming ability,confirming improved bioactivity.However,the surface structures were different at different positions and it is believed that this phenomenon is closely related to the different current densities of the surfaces during anodic oxidation.Our research evaluates the effect of anodic oxidation at different voltages on the surface modification and provides a reference for improving the bioactivity of the medical porous implant surface prepared by 3 D printing. 展开更多
关键词 Three-dimensional(3D)printing Porous implants Anodic oxidation Composite structure Current density
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Electrochemical performances of as-cast and annealed La0.8-xNd_xMg0.2Ni3.35Al0.1Si_0.05(x=0-0.4) alloys applied to Ni/metal hydride (MH) battery 认领 引用 被引量：10
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作者 Yang-Huan Zhang Hui-Ping Ren +4 位作者 Tai Yang Chen Zhao Li-Cui Chen Hong-Wei Shang Dong-Liang Zhao 《Rare Metals》 SCIE EI CAS CSCD 2013年第2期150-158,共9页
The La-Mg-Ni-based A2B7-type Lao.8_xNdx Mgo.2Ni3.35Alo.lSio.o5 （x = 0, 0.1, 0.2, 0.3, and 0.4） electrode alloys were prepared by casting and annealing. The influence of the partial substitution of Nd for La on the s... The La-Mg-Ni-based A2B7-type Lao.8_xNdx Mgo.2Ni3.35Alo.lSio.o5 （x = 0, 0.1, 0.2, 0.3, and 0.4） electrode alloys were prepared by casting and annealing. The influence of the partial substitution of Nd for La on the structure and electrochemical performances of the alloys was investigated. The structural analysis of X-ray diffraction and scanning electron microscopy reveals that the experimental alloys consist of two major phases： （La,Mg）2Ni7 with the hexagonal Ce2Ni7-type structure and LaNi5 with the hexagonal CaCus-type structure as well as some residual phases of LaNi3 and NdNis. The electrochemical measurements indicate that an evident change of the electrochemical performance of the alloys is associated with the substitution of Nd for La. The discharge capacity of the alloy first increases then decreases with the growing Nd content, whereas their cycle stability clearly grows all the time. Furthermore, the measurements of the high rate discharge ability, the limiting current density, and hydrogen diffusion coefficient all demonstrate that the electrochemical kinetic properties of the alloy electrodes first augment then decline with the rising amount of Nd substitution. 展开更多
关键词 A2B7-type electrode alloy Substitution Lawith Nd Structure Electrochemical performance
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The electrochemical hydrogen storage performances of Si-added La–Mg–Ni–Co-based A_2B_7-type electrode alloys 认领 引用 被引量：11
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作者 Yang-Huan Zhang Li-Cui Chen +3 位作者 Tai Yang Chao Xu Hui-Ping Ren Dong-Liang Zhao 《Rare Metals》 SCIE EI CAS CSCD 2015年第8期569-579,共11页
In order to improve the electrochemical cycle stability of the RE–Mg–Ni-based A2B7-type electrode alloys, a small amount of Si has been added into the alloys.The casting and annealing technologies were adopted to fa... In order to improve the electrochemical cycle stability of the RE–Mg–Ni-based A2B7-type electrode alloys, a small amount of Si has been added into the alloys.The casting and annealing technologies were adopted to fabricate the La0.8Mg0.2Ni3.3Co0.2Six(x = 0–0.2) electrode alloys. The impacts of the addition of Si and annealing treatment on the structures and electrochemical performances of the alloys were investigated systematically. The results obtained by XRD and SEM show that all the as-cast and annealed alloys are of a multiphase structure, involving two main phases(La, Mg)2Ni7and La Ni5 as well as a residual phase La Ni3. Both adding Si and the annealing treatment lead to an evident change in the phase abundance and cell parameters of(La, Mg)2Ni7and La Ni5 major phases of the alloy without altering its main phase component. Moreover, the annealing treatment has the composition of the alloy distributed more homogeneously overall and simultaneously causes the grain of the alloy to be coarsened obviously. The electrochemical measurements indicate that adding Si and the annealing treatment give a significant rise to the influence on the electrochemical performances of the alloys. In brief, the cycle stability of the as-cast and annealed alloys evidently increases with the rising of Si content, while their discharge capacities obviously decrease under the same circumstances. Furthermore, the electrochemical kineticproperties of the electrode alloys, including the high rate discharge ability, the limiting current density(IL), hydrogen diffusion coefficient(D), and the charge-transfer resistance, first augment and then decline with the rising of Si content. Similarly, it is found that the above-mentioned electrochemical properties first mount up and then go down with the rising annealing temperature. 展开更多
关键词 A2B7-type electrode alloy Adding Si Annealing trea
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The electrochemical hydrogen storage characteristics of as-spun nanocrystalline and amorphous Mg20Ni10-xM_x(M=Cu, Co, Mn;x=0–4) alloys 认领 引用 被引量：5
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作者 Yang-Huan Zhang Tai Yang +3 位作者 Hong-Wei Shang Chen Zhao Chao Xu Dong-Liang Zhao 《Rare Metals》 SCIE EI CAS CSCD 2014年第6期663-673,共11页
In this paper, we comprehensively investigate the influences of M（M=Cu, Co, Mn） substitution for Ni on the structures and electrochemical hydrogen storage characteristics of the nanocrystalline and amorphous Mg20Ni1... In this paper, we comprehensively investigate the influences of M（M=Cu, Co, Mn） substitution for Ni on the structures and electrochemical hydrogen storage characteristics of the nanocrystalline and amorphous Mg20Ni10-xMx（M=Cu, Co, Mn; x = 0–4） alloys prepared by melt spinning. The as-spun（M=None, Cu） alloys display an entire nanocrystalline structure, whereas the as-spun（M=Co, Mn） alloys hold a mixed structure of both nanocrystalline and amorphous when x = 4（M content）. These results indicate that the substitution of M（M=Co, Mn） for Ni facilitates the glass formation in Mg2Ni-type alloy. All the as-spun alloys have the Mg2 Ni major phase, but M（M=Co, Mn） substitution brings on some secondary phases,such as Mg Co2, Mg phases for M=Co, and Mn Ni, Mg phases for M=Mn. The substitution of M（M=Cu, Co, Mn）for Ni also makes a positive contribution to the cycle stability of the alloys in the following orders：（M=Cu） [（M=Co） [（M=Mn） for x = 1 and（M=Co） [（M=Mn）[（M=Cu） for x = 2–4. Meanwhile, it notably enhances the discharge capacity of the alloys in the sequence of（M=Co） [（M=Mn） [（M=Cu）. As for the high rate discharge ability, it visibly upgrades with the growing of M content for（M=Cu, Co）, while it grows at first and then declines for（M=Mn）. 展开更多
关键词 Mg2Ni-type alloy Element substitution Melt spinning Nanocrystalline and amorphous Electrochemical characteristics
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Properties of Mechanically Milled Nanocrystalline and Amorphous Mg–Y–Ni Electrode Alloys for Ni–MH Batteries 认领 引用 被引量：5
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作者 Yang-Huan Zhang Ze-Ming Yuan +2 位作者 Tai Yang Zhong-Hui Hou Dong-Liang Zhao 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2015年第7期826-836,共11页
Nanocrystalline and amorphous Mg2Ni-type Mg20-xYxNi10（x = 0,1,2,3 and 4） electrode alloys were fabricated using mechanical milling.The effects of the Y content and milling time on the microstructures and electrochem... Nanocrystalline and amorphous Mg2Ni-type Mg20-xYxNi10（x = 0,1,2,3 and 4） electrode alloys were fabricated using mechanical milling.The effects of the Y content and milling time on the microstructures and electrochemical performances of the alloys were investigated in detail.X-ray diffraction and transmission electron microscopy analyses revealed that the substitution of Y for Mg yields an obvious change in the phase composition and micro morphology of the alloys.When the Y content x ≤ 1,the substitution of Y for Mg does not change the major phase Mg2 Ni,but with a further increase in the Y content,the major phase of the alloys transforms into the YMg Ni4 YMg3 phase.A nanocrystalline and amorphous structure can be obtained by mechanical milling,and the amorphisation degree of the alloy visibly increases with increased milling time.Electrochemical measurements indicate that the discharge capacity of the alloys first increases and then decreases with increasing Y content and milling time.The substitution of Y for Mg dramatically ameliorates the cycle stability of the as-milled alloys,and the mechanical milling more or less impairs the cycle stability of the alloys.Furthermore,the high rate discharge ability,electrochemical impedance spectrum,Tafel polarisation curves and potential step measurements indicate that the electrochemical kinetic properties of the as-milled alloys first increase and then decrease with increasing Y content and milling time. 展开更多
关键词 Mg2Ni-type alloy Y substitution for Mg Milling time Electrochemical performance
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Hydrogen storage properties of La1-xPrxMgNi3.6Co0.4(x=0-0.4) alloys with annealing treatment 认领 引用 被引量：4
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作者 Ting-Ting Zhai Sheng Xu +2 位作者 Tai Yang Ze-Ming Yuan Yang-Huan Zhang 《Rare Metals》 SCIE EI CAS CSCD 2019年第9期871-876,共6页
The as-cast RE-Mg-Ni-b ased AB2-type La1-xPrxMgNi3.6Co0.4(x=0-0.4)alloys were prepared by vacuum induction melting followed by annealing treatment.The phase composition and structure were characterized by X-ray diffra... The as-cast RE-Mg-Ni-b ased AB2-type La1-xPrxMgNi3.6Co0.4(x=0-0.4)alloys were prepared by vacuum induction melting followed by annealing treatment.The phase composition and structure were characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM).The results show that LaMgNi4 and LaNi5 coexist in as-cast alloys,but only LaMgNi4 is detected in the annealed alloys.The morphology of annealed alloys is more homogeneous than that of as-cast alloys.The gaseous hydrogen storage and electrochemical properties were investigated by pressure-composition isotherm(P-C-T)and electrochemical measurements.The P-C-T curves of annealed alloys show flatter and wider pressure plateaus corresponding to absorption/desorption pressure plateaus of LaMgNi4 hydride.But the maximum hydrogen storage content of annealed alloys is lower than that of as-cast alloys.In consideration of the electrochemical properties,the annealed La0.8Pr0.2MgNi3.6Co0.4alloy exhibits a maximum discharge capacity of354.2 mAh·g-1. 展开更多
关键词 LaMgNi4 P-C-T Annealing treatment Hydrogen storage properties
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Gaseous and electrochemical hydrogen storage behaviors of nanocrystalline and amorphous Nd-added Mg_2Ni-type alloys 认领 引用 被引量：3
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作者 Yang-Huan Zhang Sheng-Long Liu +3 位作者 Tai Yang Guo-Fang Zhang Xia Li Dong-Liang Zhao 《Rare Metals》 SCIE EI CAS CSCD 2015年第7期463-471,共9页
Melt spinning technology was used to prepare the Mg2Ni-type(Mg24Ni10Cu2)100-xNdx(x = 0, 5, 10, 15,20) alloys in order to obtain a nanocrystalline and amorphous structure.The effects of the spinning rate on the structu... Melt spinning technology was used to prepare the Mg2Ni-type(Mg24Ni10Cu2)100-xNdx(x = 0, 5, 10, 15,20) alloys in order to obtain a nanocrystalline and amorphous structure.The effects of the spinning rate on the structures and gaseous and electrochemical hydrogen storage behaviors of the alloys were investigated.The analysis of X-ray diffraction(XRD), transmission electron microscope(TEM), and scanning electron microscope(SEM) linked with energy-dispersive spectroscopy(EDS)reveals that all the as-cast alloys hold a multiphase structure, involving the main phase Mg2 Ni and some secondary phases such as Mg6 Ni, Nd5Mg41, and Nd Ni.The as-spun Nd-free alloy displays an entire nanocrystalline structure,whereas the as-spun Nd-added alloys hold a nanocrystalline and amorphous structure, and the amorphization degree visibly increases with the spinning rate increasing.The melt spinning ameliorates the hydrogen storage performances of the alloys dramatically.When the spinning rate rises from 0(the as-cast was defined as the spinning rate of 0 m s-1) to 40 m s-1, the discharge capacity increases from 86.4 to 452.8 m Ah g-1, the S20(the capacity maintain rate at 20 th cycle) value increases from53.2 % to 89.7 %, the hydrogen absorption saturation ratio(Ra5, a ratio of the hydrogen absorption quantity in 5 min to the saturated hydrogen absorption capacity) increases from36.9 % to 91.5 %, and the hydrogen desorption ratio(Rd10,a ratio of the hydrogen desorption quantity in 10 min to the saturated hydrogen absorption capacity) increases from16.4 % to 47.7 % for the(x = 10) alloy, respectively. 展开更多
关键词 Mg2Ni-type alloy Element addition Melt spinning Na
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Development and Application of Hydrogen Storage 认领 引用 被引量：19
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作者 Yang-huan ZHANG Zhi-chao JIA +3 位作者 Ze-ming YUAN Tai YANG Yan QI Dong-liang ZHAO 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2015年第9期757-770,共14页
Hydrogen,as a secure,clean,efficient,and available energy source,will be successfully applied to reduce and eliminate greenhouse gas emissions.Hydrogen storage technology,which is one of the key challenges in developi... Hydrogen,as a secure,clean,efficient,and available energy source,will be successfully applied to reduce and eliminate greenhouse gas emissions.Hydrogen storage technology,which is one of the key challenges in developing hydrogen economy,will be solved through the unremitting efforts of scientists.The progress on hydrogen storage technology research and recent developments in hydrogen storage materials is reported.Commonly used storage methods,such as high-pressure gas or liquid,cannot satisfy future storage requirement.Hence,relatively advanced storage methods,such as the use of metal-organic framework hydrides and carbon materials,are being developed as promising alternatives.Combining chemical and physical hydrogen storage in certain materials has potential advantages among all storage methods.Intensive research has been conducted on metal hydrides to improve their electrochemical and gaseous hydrogen storage properties,including their hydrogen storage capacity,kinetics,cycle stability,pressure,and thermal response,which are dependent on the composition and structural feature of alloys.Efforts have been exerted on a group of magnesium-based hydrides,as promising candidates for competitive hydrogen storage,to decrease their desorption temperature and enhance their kinetics and cycle life.Further research is necessary to achieve the goal of practical application by adding an appropriate catalyst and through rapid quenching or ball milling.Improving the kinetics and cycle life of complex hydrides is also an important aspect for potential applications of hydrogen energy. 展开更多
关键词 hydrogen storage hydrogen energy metal hydride complex hydride research progress
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Structure and electrochemical properties of LaMgNi4-xCox(x=0-0.8)hydrogen storage electrode alloys 认领 引用 被引量：8
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作者 Tai Yang Ting-Ting Zhai +3 位作者 Ze-Ming Yuan Wen-Gang Bu Yan Qi Yang-Huan Zhang 《Rare Metals》 SCIE EI CAS CSCD 2018年第3期249-256,共8页
LaMgNi（4-x）Cox（x = 0-0.8） electrode alloys used for MH/Ni batteries were prepared by induction melting. The structures and electrochemical hydrogen storage properties of the alloys were investigated in detail.X-ra... LaMgNi（4-x）Cox（x = 0-0.8） electrode alloys used for MH/Ni batteries were prepared by induction melting. The structures and electrochemical hydrogen storage properties of the alloys were investigated in detail.X-ray diffraction（XRD） and scanning electron microscopy（SEM） analysis show that LaMgNi4 phase and LaNi5 phase are obtained. The lattice parameters of the two phases increase first and then decrease with Co content increasing.The electrochemical properties of the alloy electrodes were measured by means of simulated battery tests. Results show that the addition of Co does not change the discharge voltage plateau of the alloy electrodes. However, the maximum discharge capacity increases from 319.9 mAh·g^-1（x = 0）to 347.5 mAh·g^-1（x = 0.4） and then decreases to331.7 mAh·g^-1（x = 0.8）. The effects of Co content on electrochemical kinetics of the alloy electrodes were also performed. The high rate dischargeability（HRD） first increases and then decreases with Co content increasing and reaches the maximum value（95.0 %） when x = 0.4. Test results of the electrochemical impedance spectra（EIS）,potentiodynamic polarization curves and constant potential step measurements of the alloy electrodes all demonstrate that when Co content is 0.4 at%, the alloy exhibits the best comprehensive electrochemical properties. 展开更多
关键词 Hydrogen storage alloy Element substitution Phase structure Electrochemical performances Kinetics
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Hydrogen Storage Kinetics of Nanocrystalline and Amorphous LaMg12-Type Alloy–Ni Composites Synthesized by Mechanical Milling 认领 引用 被引量：2
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作者 Yanghuan Zhang Baowei Li +4 位作者 Huiping Ren Tai Yang Shihai Guo Yan Qi Dongliang Zhao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2016年第3期218-225,共8页
The nanocrystalline and amorphous LaMg11Ni ＋ x wt% Ni （x = 100, 200） composites were synthesized by the mechanical milling, and their gaseous and electrochemical hydrogen storage kinetics performance were systemati... The nanocrystalline and amorphous LaMg11Ni ＋ x wt% Ni （x = 100, 200） composites were synthesized by the mechanical milling, and their gaseous and electrochemical hydrogen storage kinetics performance were systematically investigated, The results indicate that the as-milled composites exhibit excellent hydrogen storage kinetic performances, and increasing Ni content significantly facilitates the improvement of the hydrogen storage kinetics properties of the composites. The gaseous and electrochemical hydrogen storage kinetics of the composites reaches a maximum value with the variation of milling time. Increasing Ni content and milling time both make the hydrogen desorption activation energy lower, which are responsible for the enhancement in the hydrogen storage kinetics properties of the composites. The diffusion coefficient of hydrogen atom and activation enthalpy of charge transfer on the surface of the as-milled composites were also calculated, which are considered to be the dominated factors for the electrochemical high rate discharge ability. 展开更多
关键词 LaMg12 alloy Mechanical milling Activation energy Hydrogen storage kinetics
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Synthesis, characterization and in vivo evaluation of honokiol bisphosphate prodrugs protects against rats’ brain ischemia-reperfusion injury 认领 引用
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作者 Gaojie Xu Renghan Dong +8 位作者 Jin Liu Li Zhao Yan Zeng Xiaofan Xiao Jinglin An Sheng Huang Yueling Zhong Bing Guang Tai Yang 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2019年第6期640-648,共9页
Honokiol(HK)usage is greatly restricted by its poor aqueous solubility and limited oral bioavailability.We synthesized and characterized a novel phosphate prodrug of honokiol(HKP)for in vitro and in vivo use.HKP great... Honokiol(HK)usage is greatly restricted by its poor aqueous solubility and limited oral bioavailability.We synthesized and characterized a novel phosphate prodrug of honokiol(HKP)for in vitro and in vivo use.HKP greatly enhanced the aqueous solubility of HK(127.54±15.53 mg/ml)and the stability in buffer solution was sufficient for intravenous administration.The enzymatic hydrolysis of HKP to HK was extremely rapid in vitro(T 1/2=8.9±2.11 s).Pharmacokinetics studies demonstrated that after intravenous administration of HKP(32 mg/kg),HKP was converted rapidly to HK with a time to reach the maximum plasma concentration of^5 min.The prodrug HKP achieved an improved T 1/2(7.97±1.30 h)and terminal volume of distribution(26.02±6.04 ml/kg)compared with direct injection of the equimolar parent drug(0.66±0.01 h)and(2.90±0.342 ml/kg),respectively.Furthermore,oral administration of HKP showed rapid and improved absorption compared with the parent drug.HKP was confirmed to maintain the bioactivity of the parent drug for ameliorating ischemia-reperfusion injury by decreasing brain infarction and improving neurologic function.Taken together,HKP is a potentially useful aqueous-soluble prodrug with improved pharmacokinetic properties which may merit further development as a potential drug candidate. 展开更多
关键词 Phosphate prodrug Honokiol Pharmacokinetics Focal cerebral ischemia-reperfusion
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