时效氚化锆的氦释放及结构变化

He Release and Structure Evolution of Aging Zirconium Tritide

摘要: 实验测量了氚化锆时效过程中的³He释放以及结构变化。实验结果表明，面心四方结构ZrH_1.801相的氚化锆在n(³He_gen)/n(Zr)小于0.27的时效期间，³He的释放系数处于10^-6～10^-5量级，生成的³He几乎全部被氚化物捕获。受季节温差的影响，³He的释放系数呈波浪式变化。随n(³He_gen)/n(Zr)的增加，氚化锆的晶胞体积经历了增大、维持恒定以及减小3种变化。

Abstract: Helium release and structure evolution of Zr tritide with fct-ZrH_1.801 phase were investigated. It proves that the ³He release fraction is between 10 ^-6 and 10 ^-5while n(³He_gen)/n(Zr) is smaller than 0.27. The ³He generated is trapped deeply in the tritide. The release fraction varies in wave with the temperature change between summer and winter. X-ray diffraction results show that the cell volume experiences increase, invariablenes and decrease with the n(³He_gen)/n(Zr) increasing.