辐照对Al<i><sub>x</sub></i>CrMoNbZr高熵合金涂层微观结构和力学性能的影响研究

doi:10.11896/cldb.24120102

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Abstract The Fukushima accident has highlighted the necessity for the development of fuel cladding materials for pressurized water reactors (PWRs) with superior overall performance. Coating technology can enhance cladding performance without significant modifications to the existing core fuel system, and high-entropy alloy (HEA) coatings are recognized as one of the solutions due to their exceptional properties. The radiation da-mage effect in intense irradiation fields is one of the key factors leading to material degradation and even failure. In this work, high-entropy alloy coatings of Al_xCrMoNbZr (with Al atomic percentages of 0%, 5%, 10%, 20%, and 40%) were prepared on Zr-2 alloy using the magnetron sputtering method, and they were irradiated with 6 MeV Au²⁺ at room temperature. The results indicate that the roughness of the coatings decreases after irradiation. The 0% Al coating exhibits a large number of nanocrystals, dislocations, and vacancy clusters after irradiation, but no significant elemental segregation is observed. The hardness of this coating increased by 71.6% compared to its unirradiated state. The 5% Al coating showed nanocrystals near the peak damage region after irradiation, with a 43.6% increase in hardness compared to the unirradiated state. The 10% Al, 20% Al, and 40% Al coatings remained amorphous after irradiation, but the degree of disorder in their atomic arrangements decreased, resulting in hardness increases of 21.1%, 12.5%, and 5.8%, respectively. These findings reveal that an increase in Al content can significantly enhance the radiation resistance of Al_xCrMoNbZr coatings.

Key words： high entropy alloy coating ion irradiation microstructure evolution mechanical property

Published: 25 December 2025 Online: 2025-12-17

CLC number:

TG113

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	Articles by authors
	YANG Jiaqi
	LI Haijun
	LI Haoyun
	LIAN Jie
	WANG Xiaowei
	SONG Yipeng
	ZHANG Ruijuan
	YANG Fan
	YANG Jijun

Cite this article:

YANG Jiaqi,LI Haijun,LI Haoyun, et al. Irradiation Response of Microstructure and Mechanical Properties of Al_xCrMoNbZr High Entropy Alloy Coatings[J]. Materials Reports, 2025, 39(24): 24120102-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24120102 OR https://www.mater-rep.com/EN/Y2025/V39/I24/24120102

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