Hydrogen absorption and desorption in metallic glass and nanocrystalline Zr_(52.5)Cu_(17.9)Ni_(14.6)Ti_5Al_(10) alloy  

作　　者：程晓英 王芳 

机构地区：[1]Institute of Materials Science,Shanghai University

出　　处：《中国有色金属学会会刊：英文版》2009年第2期377-382,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(0452NM002) supported by the Science and Technology Committee of Shanghai, China;Project(50671057) supported by the National Natural Science Foundation of China;Project(T0101) supported by Shanghai Leading Academic Discipline, China;Project(02ZE14033) supported by the Natural Science Foundation of Shanghai, China

摘　　要：To illuminate the intrinsic surface activity of Zr52.5Cu17.9Ni14.6Ti5Al10 alloy in its glass and nanocrystalline states,hydrogen absorption and desorption in both states was investigated by gas chromatographic analysis. The results show that the Zr52.5Cu17.9Ni14.6Ti5Al10 alloy in the nanocrystalline state can absorb a larger amount of hydrogen than that in glass state at room temperature after activation. According to the desorption process and surface state,the significant change in absorption induced by crystallization is proposed to result from that the glassy alloy has a higher desorption energy,which can adsorb gas physically and nonselectively,and is difficult to activate,while the nanocrystalline alloy can absorb much hydrogen due to the inter-atomic or intra-atomic electron transfer,which accelerates the kinetics of the catalytic reaction for the dissociation of molecular hydrogen into atomic hydrogen.To illuminate the intrinsic surface activity of Zr52.5Cul7.9Ni14.6Ti5Al10 alloy in its glass and nanocrystalline states, hydrogen absorption and desorption in both states was investigated by gas chromatographic analysis. The results show that the Zr52.5Cul7.9Ni14.6Ti5Al10 alloy in the nanocrystalline state can absorb a larger amount of hydrogen than that in glass state at room temperature after activation. According to the desorption process and surface state, the significant change in absorption induced by crystallization is proposed to result from that the glassy alloy has a higher desorption energy, which can adsorb gas physically and nonselectively, and is difficult to activate, while the nanocrystalline alloy can absorb much hydrogen due to the inter-atomic or intra-atomic electron transfer, which accelerates the kinetics of the catalytic reaction for the dissociation of molecular hydrogen into atomic hydrogen.

关 键 词：纳米晶合金 金属玻璃 解吸 吸氢 气相色谱分析 反应动力学 氢原子 表面活性 

分 类 号：TG139.7[一般工业技术—材料科学与工程]