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Thermal Desorption Behavior of Deuterium by Gas-phase Thermal Charge from Potassium Doped Tungsten Alloy
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1.Institute of Materials,China Academy of Engineering Physics;2.Science and Technology on Surface Physics and Chemistry Laboratory

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    Abstract:

    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

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[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,2021,50(3):1000~1006.]
DOI:10.12442/j. issn.1002-185X.20200270

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History
  • Received:April 24,2020
  • Revised:June 11,2020
  • Adopted:June 30,2020
  • Online: April 02,2021
  • Published: