Microstructure of tungsten coatings effect on deuterium plasma-driven permeation through RAFM steel
Microstructure of tungsten coatings effect on deuterium plasma-driven permeation through RAFM steel
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DOI：
10.1016/j.nme.2023.101557
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发表时间：
2023-12
影响因子：
2.6
通讯作者：
Kai Yang;Yue Xu;Xiao-Ping Tian;Lai-ma Luo;Jun-Jie Ni;Yu-cheng Wu
中科院分区：
文献类型：
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作者：
Kai Yang;Yue Xu;Xiao-Ping Tian;Lai-ma Luo;Jun-Jie Ni;Yu-cheng Wu
采用磁控溅射方法，通过改变溅射时间和放电功率，在CLF-1钢表面沉积了不同形貌的钨（W）涂层。然后在583-833 K温度范围内进行了氘（D）等离子体驱动渗透（PDP）实验。结果表明，致密的钨涂层降低了稳态渗透通量，延长了渗透通量达到稳态的时间。由于高密度本征缺陷的存在，涂层的D有效扩散系数低于体W的D有效扩散系数。涂层厚度的增加降低了渗透通量。此外，通过改变偏压和研究入射离子能量对D-PDP的影响，发现W涂层的引入通过重新平衡体扩散和表面复合过程影响了整体D输运。W涂层的厚度和微观结构在决定不同温度下的D稳态渗透通量方面起着关键作用。
Tungsten (W) coatings with different morphologies were deposited on CLF-1 steel by changing the sputtering time and discharge power using the magnetron sputtering method. Deuterium (D) plasma-driven permeation (PDP) experiments through W-coated CLF-1 were then carried out in the temperature range of 583–833 K. The obtained results showed that dense W coatings reduced steady-state permeation flux and prolonged the time of permeation flux reaching steady-state. Due to the existence of high-density intrinsic defects, D effective diffusivities of the coating are lower than that of bulk W. The increase of coating thickness reduced permeation flux. In addition, by changing the bias voltage and studying the influence of incident ion energy on D-PDP, it is found that the introduction of W coating affected the overall D transport by re-balancing the bulk diffusion and surface recombination processes. The thickness and microstructure of W coatings played a key role in determining the D steady-state permeation flux at varying temperatures.