郑振华,叶小球,吴吉良,蒋春丽,杨飞龙,桑革.钾掺杂钨合金中气相热充氘的热脱附行为[J].稀有金属材料与工程,0,():-.[ZHENG Zhenhua,YE Xiaoqiu,WU Jiliang,JIANG Chunli,YANG Feilong,SANG Ge.Thermal Desorption Behavior of Deuterium by Gas-phase Thermal Charge from Potassium Doped Tungsten Alloy[J].Rare Metal Materials and Engineering,0,():-].
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钾掺杂钨合金中气相热充氘的热脱附行为
投稿时间:2020-04-24  修订日期:2020-06-11
中文关键词:  面向等离子体材料  钾掺杂钨合金  气相热充  热脱附  氘滞留
基金项目:国家磁约束核聚变能发展研究专项课题(2015GB109002)
中文摘要:
      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82 ppm的W-K合金,通过气相热充法引入D元素,考察热脱附行为。研究表明,气相热充D释放温区从600 K延伸至1200 K ,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滞留量不到1 appm左右,掺杂K后有所提高,但依然大大优于商用ITER级纯W。
Thermal Desorption Behavior of Deuterium by Gas-phase Thermal Charge from Potassium Doped Tungsten Alloy
英文关键词:Plasma-Facing Materials  Potassium Doped Tungsten Alloy  Gas-phase Thermal Charge  Thermal Desorption  Deuterium Retention
英文摘要:
      As the most promising plasma facing materials (PFMs),potassium doped tungsten alloy have exhibited excellent high temperature mechanical properties. In order to evaluate the hydrogen isotope residence in WK alloy,the pure W and the WK alloy with 82 ppm potassium doping 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 with different heating rates. The results show that deuterium released gradually at 600 K~1200 K. And after doping K, the activation energy of thermal desorption of deuterium reduced from 0.86 eV to 0.68 eV; The retention of deuterium in tungsten sample is less than 1 appm and it is enhanced with doping K,but still lower than that of commercial pure W
作者单位
郑振华 中国工程物理研究院材料研究所 
叶小球 表面物理与化学重点实验室 
吴吉良 表面物理与化学重点实验室 
蒋春丽 表面物理与化学重点实验室 
杨飞龙 中国工程物理研究院材料研究所 
桑革 中国工程物理研究院材料研究所 
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