利用X射线衍射技术分析LaNi_5氚老化效应  

Analysis of Tritium-Aging Effects of LaNi_5 Alloys Using XRD

作　　者：王勤国[1] 李嵘[1] 帅茂兵[1] 敬文勇[1] 

机构地区：[1]表面物理与化学国家重点实验室,四川绵阳621907

出　　处：《核化学与放射化学》2009年第4期250-252,共3页Journal of Nuclear and Radiochemistry

摘　　要：利用覆膜法对长期贮存氚的LaNi5进行了XRD分析。经过实验发现,老化后的LaNi5的谱峰比新鲜的LaNi5存在明显的展宽,而经过高温除He处理后,又恢复到新鲜的LaNi5水准,氚衰变形成的3He在晶格中居留并在其中形成部分位错亚结构,这可能是导致LaNi5XRD衍射峰宽化的主要原因。The crystal structure of LaNi5 alloy after longterm storage of tritium was investigated by means of X-ray diffraction （XRD）. The results show broadened peaks on the XRD spectra of the specimens compared with that of the as-received ones, indicating clear aging effects of the alloy. The main reason causing the aging effects of the alloy is likely due to the tritium produced ^3 He, which might induce dislocation sub-structures in the crystal. The alloy shows the ability to be near fully recovered through high temperature treatment.

关 键 词：LANI5 3He 氚老化 XRD 

分 类 号：TL817.1[核科学技术—核技术及应用]