Recrystallization behaviour of high-flux hydrogen plasma exposed tungsten

JOURNAL OF NUCLEAR MATERIALS

卷:545

Article

Shah, V.¹  Beune, J. T. S.¹  Li, Y.^1,2  Loewenhoff, Th.³  Wirtz, M.³  Morgan, T. W.²  van Dommelen, J. A. W.¹ 

[1] Eindhoven Univ Technol, Dept Mech Engn, POB 513, NL-5600 MB Eindhoven, Netherlands

[2] DIFFER Dutch Inst Fundamental Energy Res, Zaale 20, NL-5612 AJ Eindhoven, Netherlands

[3] Forschungszentrum Julich, Inst Energie & Klimaforsch, D-52425 Julich, Germany

关键词: Tungsten;    Hydrogen;    Plasma exposure;    Hardness;    Recrystallization kinetics;   

DOI  :  10.1016/j.jnucmat.2020.152748

来源: Elsevier

【 摘 要 】

Knowledge of a material's thermal stability under extreme synergistic particle and heat loads is crucial for developing high performance reactor materials. In this work, the recrystallization behaviour of tungsten under the influence of hydrogen is investigated by low energy high flux hydrogen plasma exposure for various lengths of time. The microstructural changes following exposure are probed by micro-indentation, electron back-scatter diffraction measurements and the characteristic time for recrystallization is assessed using the Johnson-Mehl-Avrami-Kolmogorov UMAK) model. A recrystallization activation energy in the range of 425 to 440 kJ.mol(-1) is determined, identical to that of oven annealed samples, thereby indicating an insignificant influence of hydrogen plasma on the recrystallization kinetics of tungsten. (C) 2020 The Author(s). Published by Elsevier B.V.

【 授权许可】

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