Influence of rhenium addition on deuterium plasma-driven permeation and retention in tungsten coatings

被引：0
|
作者：
Tian, Xiao-Ping [1 ]
Xu, Yue [1 ,2 ]
Tan, Hong-Yan [1 ]
He, Yan [1 ]
Fu, Hai-Ying [3 ]
Luo, Lai-Ma [1 ,2 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China
[2] Minist Educ, Copper Alloy & Forming Engn Res Ctr, Hefei 230009, Peoples R China
[3] Southwestern Inst Phys, Ctr Fus Sci, Chengdu 610225, Peoples R China
来源：
FUSION ENGINEERING AND DESIGN | 2025年 / 211卷
基金：
中国国家自然科学基金;
关键词：
Tungsten coating; Rhenium; Plasma-driven permeation; Deuterium retention; RAFM steel; HYDROGEN ISOTOPES; 1ST WALL; DIFFUSION; FUSION; TRANSMUTATION; TRANSPORT; RELEASE; IRRADIATION;
D O I：
10.1016/j.fusengdes.2025.114822
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The effect of transmutation element rhenium (Re) on deuterium (D) plasma-driven permeation (PDP) and retention in magnetron-sputtered W coatings was studied. It was found that the W-Re coating showed higher steady-state D permeation flux and diffusion coefficient than the pure W coating, which was attributed to the influence of Re on the capture energy of D in W. The TDS results showed that W-Re coating had lower D retention compared to pure W coating. The decreased D inventory was due to the higher solvation energy of D in W-Re coatings and the repulsive effect of Re on D atoms. The impact of W-Re coatings thickness on D permeation was also investigated. D-PDP flux and the effective diffusion coefficient were found to decrease as the coating thickness increased. The study examined the impact of incident ion energy on D-PDP. The presence of coatings altered the balance between bulk diffusion and surface recombination dynamics. Besides, He pre-irradiation of W and W-Re coatings revealed that He irradiation reduced the D-PDP flux and increased the D diffusion coefficient in the coatings due to the formation of He bubbles. The diffusion coefficient of irradiated W-Re coating was lower than that of irradiated pure W coating because the Re element of the W-Re coating stabilized the crystal lattice structure.
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页数：9
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