| 镍中氢与缺陷互作用的正电子寿命和多普勒展宽研究 |
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| 引用本文： | 吴奕初,朱梓英,伊东芳子,伊藤泰男.镍中氢与缺陷互作用的正电子寿命和多普勒展宽研究[J].物理学报,1997,46(2):406-410. |
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| 作者姓名： | 吴奕初 朱梓英 伊东芳子 伊藤泰男 |
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| 作者单位： | (1)日本东京大学核科学与技术研究中心; (2)日本理化学研究所; (3)中山大学物理系 |
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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
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| 关 键 词： | 正电子寿命 多普勒展宽 晶体缺陷 镍 金属 氢脆 |
| 收稿时间： | 1996-01-22 |
POSITRON LIFETIME AND DOPPLER BROADENING TECHNIQUES STUDIES ON THE INTERACTION BETWEEN HYDROGEN AND DEFECTS IN NICKEL |
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| WU YI-CHU,ZHU ZHI-YING,YOSHIKO ITOH and YASUO ITO.POSITRON LIFETIME AND DOPPLER BROADENING TECHNIQUES STUDIES ON THE INTERACTION BETWEEN HYDROGEN AND DEFECTS IN NICKEL[J].Acta Physica Sinica,1997,46(2):406-410. |
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| Authors: | WU YI-CHU ZHU ZHI-YING YOSHIKO ITOH and YASUO ITO |
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| 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. |
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