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Al-TiO_2-B_2O_3反应体系的机械力化学与热化学行为 认领 引用 被引量:6
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作者 马壮 林鹏 +1 位作者 董世知 李智超 《中国有色金属学报》 EI CAS 北大核心 2010年第5期908-913,共6页
通过机械球磨系统地研究Al-TiO2-B2O3反应体系粉体的机械力化学与热化学行为。结果表明:Al-TiO2-B2O3复合粉体球磨20h后,中位径可达到4.35μm,形状近乎球形,并生成少量Al2O3、TiB2等新相;机械力化学作用使其在400℃左右就可发生缓慢的... 通过机械球磨系统地研究Al-TiO2-B2O3反应体系粉体的机械力化学与热化学行为。结果表明:Al-TiO2-B2O3复合粉体球磨20h后,中位径可达到4.35μm,形状近乎球形,并生成少量Al2O3、TiB2等新相;机械力化学作用使其在400℃左右就可发生缓慢的固相反应,在670℃时反应最为剧烈;在700℃热处理时,产物大部分为Al2O3和TiB2;在1000℃热处理时,产物全部为Al2O3和TiB2。 展开更多
关键词 Al-TiO2-B2O3反应体系 机械力化学 热化学 粉体
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Self-Propagating High-Temperature Reductive Synthesis of TiB_2-Al_2O3Composite Powders 认领 引用 被引量:1
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作者 YU Zhiqiang YANG Zhenguo 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第1期48-51,共4页
TiB2-Al2O3 composite powders were produced by self-propagating high-temperature synthesis(SHS)method with reductive process from B2O3-TiO2-AI system.X-ray diffraction(XRD)and scanning electron microscopy(SEM)analyses ... TiB2-Al2O3 composite powders were produced by self-propagating high-temperature synthesis(SHS)method with reductive process from B2O3-TiO2-AI system.X-ray diffraction(XRD)and scanning electron microscopy(SEM)analyses show the presence of TiB2 and Al2O3 only in the composite powders produced by SHS.The powders are uniform and free-agglomerate.Transmission electron microscopy(TEM)and high resolution electron microscopy(HREM)observation of microstructure of the composite powders indicate that the interfaces of the TiB2-Al2O3 bond well,without any interfacial reaction products.It is proposed that the good interfacial bonding of the composite powders can be resulted from the TiB2 particles crystallizing and growing on the Al2O3 particles surface with surface defects acting as nucleation centers. 展开更多
关键词 SHS with reductive process TiB2-Al2O3 composite powders B2O3+TiO2+Al system microstructure
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