Irradiation Response of Microstructure and Mechanical Properties of AlxCrMoNbZr High Entropy Alloy Coatings
YANG Jiaqi1, LI Haijun1, LI Haoyun1, LIAN Jie1, WANG Xiaowei1, SONG Yipeng1, ZHANG Ruijuan1,YANG Fan1, YANG Jijun2,*
1 CNNC Key Laboratory of Mass Spectrometry, Leshan 614200, Sichuan, China 2 Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, China
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 AlxCrMoNbZr (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 AlxCrMoNbZr coatings.
杨佳奇, 李海军, 李皓云, 廉杰, 王小维, 宋祎鹏, 张瑞娟, 杨帆, 杨吉军. 辐照对AlxCrMoNbZr高熵合金涂层微观结构和力学性能的影响研究[J]. 材料导报, 2025, 39(24): 24120102-8.
YANG Jiaqi, LI Haijun, LI Haoyun, LIAN Jie, WANG Xiaowei, SONG Yipeng, ZHANG Ruijuan,YANG Fan, YANG Jijun. Irradiation Response of Microstructure and Mechanical Properties of AlxCrMoNbZr High Entropy Alloy Coatings. Materials Reports, 2025, 39(24): 24120102-8.
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2025, Vol. 39 
