Materials Reports  2022, Vol. 36 Issue (Z1): 22030154-5 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Deuterium Permeation Test of a Conceptual First Wall Containing a TiN Interlayer |
| ZHANG Shuting, HUANG Xiangmei, ZHAO Dongye, HONG Zhihao, ZENG Xiaoxiao, CAI Laizhong
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| Southwestern Institute of Physics, Chengdu 610041, China |
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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.
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Published: 05 June 2022
Online: 2022-06-08
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| Fund:National Magnetic Confinement Fusion Program of China (2019YFE031203,2019YFE031204),and the National Natural Science Foundation of China (11905049). |
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