%A 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) %T Determination of activation energy of ion-implanted deuterium release from W-Y2O3 %0 Journal Article %D 2020 %J Chin. Phys. B %R 10.1088/1674-1056/ab8204 %P 65205-065205 %V 29 %N 6 %U {https://cpb.iphy.ac.cn/CN/abstract/article_122557.shtml} %8 2020-06-05 %X 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.