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

作　　者：Xue-Feng Wang Ji-Liang Wu Qiang Li Rui-Zhu Yang Zhan-Lei Wang Chang-An Chen Chun-Rong Feng Yong-Chu Rao Xiao-Hong Chen Xiao-Qiu Ye 王雪峰;吴吉良;李强;杨蕊竹;王占雷;陈长安;冯春蓉;饶咏初;谌晓洪;叶小球(School of Sciences and Research Center for Advanced Computation,Xihua University,Chengdu 610039,China;Science and Technology on Surface Physics and Chemistry Laboratory,Mianyang 621907,China)

机构地区：[1]School of Sciences and Research Center for Advanced Computation,Xihua University,Chengdu 610039,China [2]Science and Technology on Surface Physics and Chemistry Laboratory,Mianyang 621907,China

出　　处：《Chinese Physics B》2020年第6期327-332,共6页中国物理B（英文版）

基　　金：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);the National Natural Science Foundation of China(Grant No.21401173).

摘　　要：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 × 1026D/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.

关 键 词：metals and alloys plasma-based ion implantation thermal desorption diffusion in solid 

分 类 号：O53[理学—等离子体物理]