Effects of thermal aging on Fe ion-irradiated Fe–0.6%Cu alloy investigated by positron annihilation  

作　　者：Yuan-Chao Hu Xing-Zhong Cao Peng Zhang Hidetsugu Tsuchida Qiu Xu Shuo-Xue Jin Er-Yang Lu Yu-Xiao Li Run-Sheng Yu Bao-Yi Wang Long Wei 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China [2]College of Physical Engineering, Zhengzhou University,Zhengzhou 450001, China [3]Quantum Science and Engineering Center, Kyoto University,Uji 6110011, Japan [4]Research Reactor Institute, Kyoto University,Osaka 5900494, Japan

出　　处：《Nuclear Science and Techniques》2017年第2期8-11,共4页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.91026006,91226103,11475193,11475197,11575205and 11505192);Beijing Natural Science Foundation(No.1164017)

摘　　要：Thermal aging effects on surface of 2.5 Me V Fe ion-irradiated Fe–0.6%Cu alloy were investigated using positron annihilation techniques. The samples were irradiated at 573 K to a dose of 0.1 dpa. Their thermal aging was performed at 573 K for 5, 50 and 100 h. From the results of Doppler broadening measurement, an obvious trough could be seen in near-surface region from the S parameters and inflection point form at S–W curves. This indicates changes in the annihilation mechanism of positrons in surface region after thermal aging. Coincident Doppler broadening indicates that the density of Cu precipitates in the thermal aged samples decreased, due to recovery of the vacancies.Thermal aging effects on surface of 2.5 MeV Fe ion-irradiated Fe-0.6%Cu alloy were investigated using positron annihilation techniques. The samples were irradiated at 573 K to a dose of 0.1 dpa. Their thermal aging was performed at 573 K for 5, 50 and 100 h. From the results of Doppler broadening measurement, an obvious trough could be seen in near-surface region from the S parameters and inflection point form at S-W curves. This indicates changes in the annihilation mechanism of positrons in surface region after thermal aging. Coincident Doppler broadening indicates that the density of Cu precipitates in the thermal aged samples decreased, due to recovery of the vacancies.

关 键 词：Fe–Cu alloy POSITRON ANNIHILATION IRRADIATION Thermal aging 

分 类 号：TG142.1[一般工业技术—材料科学与工程]