Determination of activation energy of ion-implanted deuterium release from W-Y2O3

doi:10.1088/1674-1056/ab8204

Abstract The retention and release of deuterium in W-2%Y₂O₃ composite materials and commercially pure tungsten after they have been implanted by deuterium plasma (flux ～3.71×10²¹ D/m²·s, energy ～25 eV, and fluence up to 1.3×10²⁶ D/m²) are studied. The results show that the total amount of deuterium released from W-2%Y₂O₃ is 5.23×10²⁰ D/m²(2.5 K/min), about 2.5 times higher than that from the pure tungsten. Thermal desorption spectra (TDS) at different heating rates (2.5 K/min-20 K/min) reveal that both W and W-2%Y₂O₃ have two main deuterium trapped sites. For the low temperature trap, the deuterium desorption activation energy is 0.85 eV (grain boundary) in W, while for high temperature trap, the desorption activation energy is 1.57 eV (vacancy) in W and 1.73 eV (vacancy) in W-2%Y₂O₃.

Keywords: metals and alloys plasma-based ion implantation thermal desorption diffusion in solid

Received: 06 January 2020
Revised: 05 March 2020
Accepted manuscript online:

PACS:	61.82.Bg	(Metals and alloys)
	52.77.Dq	(Plasma-based ion implantation and deposition)
	68.43.Vx	(Thermal desorption)
	66.30.-h	(Diffusion in solids)

Fund: Project supported by the National Magnetic Confinement Fusion Energy Research Project, Ministry of Science and Technology of China (Grant No. 2015GB109002), the Innovation Fund of Postgraduate, Xihua University, China (Grant No. ycjj2018017), and the National Natural Science Foundation of China (Grant No. 21401173).

Corresponding Authors: Xiao-Hong Chen, Xiao-Qiu Ye
E-mail: shengxiaohongb@163.com;xiaoqiugood@sina.com

Cite this article:

Xue-Feng Wang(王雪峰), Ji-Liang Wu(吴吉良), Qiang Li(李强), Rui-Zhu Yang(杨蕊竹), Zhan-Lei Wang(王占雷), Chang-An Chen(陈长安), Chun-Rong Feng(冯春蓉), Yong-Chu Rao(饶咏初), Xiao-Hong Chen(谌晓洪), Xiao-Qiu Ye(叶小球) Determination of activation energy of ion-implanted deuterium release from W-Y₂O₃ 2020 Chin. Phys. B 29 065205

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Determination of activation energy of ion-implanted deuterium release from W-Y2O3

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Determination of activation energy of ion-implanted deuterium release from W-Y₂O₃