Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (2): 16 doi: 10.1007/s41365-016-0172-9

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

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

Yuan-Chao Hu 1,2, Xing-Zhong Cao 1,Peng Zhang 1, Hidetsugu Tsuchida 3, Qiu Xu 4, Shuo-Xue Jin 1, Er-Yang Lu 1, Yu-Xiao Li 2, Run-Sheng Yu 1, Bao-Yi Wang 1, Long Wei 1   

  1. 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
  • Contact: Xing-Zhong Cao E-mail:caoxzh@ihep.ac.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (Nos. 91026006, 91226103, 11475193, 11475197, 11575205 and 11505192) and Beijing Natural Science Foundation (No. 1164017).

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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. Effects of thermal aging on Fe ion-irradiated Fe–0.6%Cu alloy investigated by positron annihilation.Nuclear Science and Techniques, 2017, 28(2): 16     doi: 10.1007/s41365-016-0172-9
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Abstract:

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.

Key words: Fe–Cu alloy, Positron annihilation, Irradiation, Thermal aging