Positron Lifetime Study on Degradation of TiCrV Hydrogen Storage Alloy

摘要：

Using positron lifetime spectroscopy, we examined the evolution of defects in the Ti24Cr36V40 alloy prepared by arc-melting method during hydriding cycles. We found that the positron lifetime increases with increasing the pressure swing cycles. This behavior is well correlated with the degradation of hydrogen transfer change with the pressure swing cycles. The prolonged positron lifetime is attributed to dislocation-related defects. Both dislocations and vacancies bound at dislocations may act as positron trapping centers. After the heat treatment at 400℃, a partial recovery of positron lifetime was observed.

关键词： Hydrogen storage alloy Defects Vacancy Dislocation Positron Lifetime X-ray diffraction

作者: A.Kawasuso H.Arashima M.Maekawa H.Itoh T.Kabutomori

作者单位: ASCRC,Japan Atomic Energy Agency,1233,Takasaki,Gunma,370-1292,Japan MRL,The Japan Steel Works,Ltd.4,Chatsumachi,Muroran,051-8505,Japan

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 122-124

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）