Study of vacancies in the intermetallic compound Ni3Al by positron annihilation
Study of vacancies in the intermetallic compound Ni3Al by positron annihilation
复制标题
金属间化合物Ni3Al中空位的正电子湮灭研究
DOI：
10.1088/0305-4608/14/1/006
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
M. Doyama
中科院分区：
文献类型：
--
作者：
T. Wang;M. Shimotomai;M. Doyama
金属间化合物 Ni3Al 的样品在室温下受到 2 MeV 电子的辐照，或从 900 摄氏度淬火至约 1300 摄氏度，随后进行等时退火。使用正电子寿命研究了空位的行为。空位在215℃左右退火。空位的形成能被确定为EvF=1.6+或-0.2eV。空位运动的活化能估计为EvM=1.2+或-0.2eV。发现空位的退火是二级反应。
Specimens of the intermetallic compound Ni3Al were irradiated by 2 MeV electrons at room temperature or quenched from 900 degrees C to about 1300 degrees C and subsequently annealed isochronally. The behaviour of the vacancies was studied using the positron lifetime. The vacancies annealed out around 215 degrees C. The formation energy of a vacancy was determined to be EvF=1.6+or-0.2 eV. The activation energy for the motion of the vacancy was estimated to be EvM=1.2+or-0.2 eV. The annealing of the vacancies was found to be a second-order reaction.