钾掺杂钨合金中气相热充氘的热脱附行为  

Thermal Desorption Behavior of Deuterium by Gas-phase Thermal Charge from Potassium Doped Tungsten Alloy

作　　者：郑振华[1,2] 叶小球 吴吉良[2] 蒋春丽 杨飞龙[1] 桑革[1,2] Zheng Zhenhua;Ye Xiaoqiu;Wu Jiliang;Jiang Chunli;Yang Feilong;Sang Ge(Institute of Materials,China Academy of Engineering Physics,Mianyang 621907,China;Science and Technology on Surface Physics and Chemistry Laboratory,Mianyang 621908,China)

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

出　　处：《稀有金属材料与工程》2021年第3期1000-1006,共7页Rare Metal Materials and Engineering

基　　金：国家磁约束核聚变能发展研究专项(2015GB109002)。

摘　　要：钾(K)掺杂钨(W)合金已经表现了优异的高温力学性能,成为最有希望的PFMs备选材料之一。为评估氢同位素在W-K合金中的滞留情况,采用放电等离子烧结技术(SPS),制备了纯W及K含量82μg/g的W-K合金,通过气相热充法引入氘(D)元素,考察热脱附行为。研究表明,气相热充氘释放温区从600K延伸至1200K,掺杂K后,D脱附活化能从0.86 eV下降到0.68 eV;纯W样品D滞留量在1×10^(-6)(原子比)左右,掺杂K后有所提高,但依然大大优于商用ITER级纯W。As the most promising plasma facing materials(PFMs),potassium doped tungsten alloy exhibits excellent high temperature mechanical properties.In order to evaluate the hydrogen isotope residence in WK alloy,the pure W and the WK alloys doped with 82μg/g potassium were prepared by spark plasma sintering(SPS).After deuterium was introduced into potassium doped tungsten alloy by gas-phase thermal charge,thermal desorption spectra(TDS)were obtained at different heating rates.The results show that deuterium release occurs gradually at 600~1200 K.And after doping K,the activation energy of thermal desorption of deuterium reduces from 0.86 to 0.68 e V.The retention of deuterium in tungsten sample is less than 1×10^(-6)(atom ratio)and it is enhanced with doping K,but still lower than that of commercial pure W alloy.

关 键 词：面向等离子体材料 钾掺杂钨合金 气相热充 热脱附 氘滞留 

分 类 号：TL627[核科学技术—核技术及应用]