Abstract: From the standpoints of tritium self-sufficiency and the safety regulation, the control of the tritium inventory of the first wall is crucial. A conceptual first wall of Tritium barrier transition layer was designed and fabricated, consisting of CVD-W as plasma-facing material, reduced activation ferritic/martensitic CLF-1 as substrate and a TiN interlayer that benefited the resistance of tritium permeation and strengthened the bon-ding of CVD-W and CLF-1. The conceptual first wall samples with different substrate roughnesses were fabricated and analyzed in this work. The GDP tests were performed on the conceptual first wall samples and bare CLF-1. The morphology and elements distributions were characterized by employing the XRD and the SEM equipped with EDS. The results indicated that the first wall samples containing TiN interlayer could reduce the deuterium permeation crucially compared with the bare CLF-1. The permeability of the deuterium follows the Arrhenius relationship with the temperature. Sample T2 with a rougher substrate surface had a relatively higher deuterium permeability which was caused by the broken and peel-off of the CVD-W layer and the cracks in the TiN layer during the GDP test.
张舒婷, 黄向玫, 赵栋烨, 洪志浩, 曾晓晓, 才来中. 含TiN阻氚过渡层新型第一壁的氘渗透实验研究[J]. 材料导报, 2022, 36(Z1): 22030154-5.
ZHANG Shuting, HUANG Xiangmei, ZHAO Dongye, HONG Zhihao, ZENG Xiaoxiao, CAI Laizhong. Deuterium Permeation Test of a Conceptual First Wall Containing a TiN Interlayer. Materials Reports, 2022, 36(Z1): 22030154-5.
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2022, Vol. 36 
