α-Al_2O_3在高温氢中的稳定性研究  

Stability of α-Al_2O_3 in High Temperature Hydrogen Atmosphere

作　　者：莫丽玢[1] 李群[1] 向青云[1] 曹江利[1] 

机构地区：[1]北京科技大学新材料技术研究院,北京100083

出　　处：《陶瓷学报》2014年第6期567-572,共6页Journal of Ceramics

基　　金：中央高校基本科研经费专项资金(编号:FRF-SD-12-027A;FRF-TP-13-047);新世纪优秀人才支持计划(编号:NCET-12-0778);科技部创新方法工作专项项目(编号:2012IM030500);国家留学基金

摘　　要：热核聚变堆阻氚渗透涂层不仅要有低的氚渗透性能,还需要有高硬度和高电阻率以及长期服役可靠性等。因此,保持阻氚渗透涂层材料在高温氢中工作的稳定性是非常重要的。α-Al2O3材料是一种典型的阻氚涂层材料,本研究对α-Al2O3材料在高温氢中的稳定性研究,发现α-Al2O3材料在高温氢气氛中的晶体结构和电学性能都很稳定。但力学性能经过一段时间的氢处理后有所下降,单晶样品的显微硬度从1600 kgf/mm2下降到了1200 kgf/mm2,陶瓷样品的硬度从1100 kgf/mm2下降到了900 kgf/mm2。In fusion reactors, tritium permeation barriers should obtain properties of low tritium permeability, high hardness and electrical resistivity and so on. Therefore, the stability of α-Al_2O_3 is extremely vital for the fabrication of high performance tritium permeation barriers. In the present study, the stability of α-Al_2O_3 in high temperature hydrogen atmosphere was investigated. The result shows that the crystal structure and electrical properties of α-Al_2O_3 were very stable. The mechanical properties of α-Al_2O_3 were decreased through hydrogenation. The single crystal samples decreased from 1600 kgf/mm^2 to 1200 kgf/mm^2, and the ceramic samples decreased from 1100 kgf/mm^2 to 900 kgf/mm^2.

关 键 词：α-Al_2O_3 氢 稳定性 高温 力学性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]