钨粉中驻留氘去除技术研究  

Deuterium Removal Technology in Tungsten Powder

作　　者：于文臻 黄河[2] 王占雷 严俊 叶小球[1,2] 王雪峰 罗林龄 冯春蓉 李冰清 饶咏初 肖瑶[1] Yu Wenzhen;Huang He;Wang Zhanlei;Yan Jun;Ye Xiaoqiu;Wang Xuefeng;Luo Linling;Feng Chunrong;Li Bingqing;Rao Yongchu;Xiao Yao(Science and Technology on Surface Physics and Chemistry Laboratory,Mianyang 621908,China;Institute of Materials,China Academy of Engineering Physics,Mianyang 621907,China)

机构地区：[1]表面物理与化学重点实验室,四川绵阳621908 [2]中国工程物理研究院材料研究所,四川绵阳612907

出　　处：《稀有金属材料与工程》2020年第11期3932-3937,共6页Rare Metal Materials and Engineering

基　　金：国家磁约束核聚变能发展研究专项(2015GB109002,2018YFE0312400)。

摘　　要：氢同位素在钨基材料中的滞留及有效去除,对于材料在聚变堆工况下的损伤评估和氢同位素燃料的投放有着重要的意义。为消除块体钨的几何尺寸因素在氢同位素滞留与有效去除研究中的影响,本研究使用钨粉进行了氢同位素滞留与有效去除,采用热解吸法与同位素置换法2种方式对气相热充进入钨粉的氘进行去除,获得了2种方式去除后钨粉中氘的残留量、脱附特征峰、固溶度等结果。结果表明,2种去除方式对于钨粉中驻留的表面吸附、低能陷阱捕获和高能陷阱捕获的氘都有明显的去除效果;2种去除方式达到平衡的时间与条件不同;同位素置换法相较热解吸法去除效果更好,但操作难度更大,综合考虑,热解吸法具有较大优势。Tungsten is the material of choice for the first wall of magnetically constrained thermonuclear fusion reactors.The retentio n and effective removal of hydrogen isotopes in tungsten-based materials is of great significance for the damage assessment of materials under the conditions of fusion reactors and the placement of hydrogen isotope fuels.In order to eliminate the influence of the geo metrical factors of bulk tungsten in the study of hydrogen isotope retention and effective removal,the work of hydrogen isotope retention and effective removal was carried out in this work,using thermal desorption and isotope exchange.By using these two methods,the deuterium retained in powder tungsten has been removed,and the residual amount,desorption characteristic peak and solid solubility of the tungsten powder in the two methods were obtained.The results show that the two removal methods have obvious removal effects on the three types of deuterium residing in tungsten powder;the time and conditions for the two removal methods to reach equilibrium are different.Although the isotope exchange is more effective than the thermal desorption,its operation is more difficult;so the thermal desorption method has a greater advantage.

关 键 词：钨 氘 热解吸 同位素交换 

分 类 号：TL627[核科学技术—核技术及应用]