Hydrogen desorption behaviors of zirconium hydride in oxygen containing atmosphere

作者：Chen Wei dong; Wang Jian wei; Wang Li jun^*; Lu Shi gang

来源：Transactions of Nonferrous Metals Society of China, 2007, 17: S945-S948.

• zirconium hydride
• gas phase analysis(GPA)
• hydrogen desorption
• oxide scale

Hydrogen desorption behaviors of zirconium hydride at temperature range of 100-900 degrees C 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 degrees C and reaches maximum at 660 degrees C and ends eventually at 800 degrees C. No hydrogen desorption is found at the temperature range from 800 degrees C to 900 degrees C. An oxide scale with approximately 20 mu m in thickness formed on the surface of zirconium hydride acts as an effective diffusion barrier.

• 出版日期2007-11
• 单位北京有色金属研究总院