Hydrogen desorption behaviors of zirconium hydride in oxygen containing atmosphere

来源期刊：中国有色金属学报(英文版)2007年增刊第1期(Part ⅡB)

论文作者：陈伟东 王建伟 王力军 卢世刚

文章页码：945 - 948

Key words：zirconium hydride; gas phase analysis(GPA); hydrogen desorption; oxide scale

Abstract: Hydrogen desorption behaviors of zirconium hydride at temperature range of 100-900 ℃ in mixture gases of helium and oxygen was studied by gas phase analysis(GPA). Meanwhile, the morphologies of the oxide scale formed on the surface of zirconium hydride were analyzed by scanning electron microscopy(SEM). The hydrogen desorption is retarded effectively when zirconium hydride is exposed to an oxygen containing atmosphere. Hydrogen desorption in mixed gas of helium and oxygen starts at 525 ℃ and reaches maximum at 660 ℃ and ends eventually at 800 ℃. No hydrogen desorption is found at the temperature range from 800 ℃ to 900 ℃. An oxide scale with approximately 20 μm in thickness formed on the surface of zirconium hydride acts as an effective diffusion barrier.

基金信息：the National Natural Science Foundation of China