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摘要: 采用正电子寿命和多普勒展宽技术研究了退火、回复及冷轧镍中氢与缺陷的互作用.结果表明:冷轧镍充氢后正电子平均寿命和多普勒展宽S参数上升,并且寿命谱的两成分拟合出现一个390ps的长寿命分量;而退火及回复镍充氢后正电子平均寿命和多普勒展宽S参数均不改变.因此认为冷轧镍充氢后正电子参数(平均寿命和S参数)的上升取决于氢和空位的互作用,与氢和位错的互作用无关;氢空位对也可以作为聚集空位的核心
Abstract: The interaction between hydrogen and defects in annealed,473K tempered and cold-rolled nickel samples has been investigated by positron lifetime and Doppler broadening measurements.Experimental results show that there has been no effect of hydrogen-charging on the nickel samples containing only dislocations,while in the samples containing vacancies the effect was evident.A long-lifetime component appeared for the latter,which may indicate that the hydrogen-vacancy composite is also the center of vacancy agglomeration.