铝浓度对AlNbTiZr中熵合金涂层微观结构及性能的影响
Effect of Al Concentration on Microstructure and Properties of AlNbTiZr Medium-Entropy Alloy Coatings.
作者信息
Xin Hongyang, Yang Jijun, Mao Jianjun, Chen Qingsong, Yang Jiaqi, Zhang Wei, Ning Zhien, Teng Changqing, Ma Cong, Wu Lu, Wu Xiaoyong
机构信息
The First Sub-Institute, Nuclear Power Institute of China, Chengdu 610041, China.
Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China.
出版信息
Materials (Basel). 2021 Dec 12;14(24):7661. doi: 10.3390/ma14247661.
The AlNbTiZr medium-entropy alloy (MEA) coatings with different Al contents were prepared on N36 zirconium alloy substrates by RF magnetron co-sputtering. The morphology, microstructure, mechanical properties, surface wettability and corrosion resistance of the AlNbTiZr MEA coatings were studied to evaluate the surface protection behavior of zirconium alloy cladding under operation conditions of a pressurized water reactor. The results showed that all the coatings were composite structures with amorphous and bcc-structured nanocrystals. With the increase of Al content, both the elastic modulus and hardness decreased first and then increased. The hydrophobicity of the coatings was enhanced compared with that of the substrate. The 10.2 at.% Al AlNbTiZr coating had the best corrosion resistance and the minimum oxygen penetration depth, which originated from the formation of a denser oxide layer consisting of NbZrO and ZrO. This study provides an improved idea for the design and development of Al-containing MEA coating materials for accident tolerant fuel.
通过射频磁控共溅射在N36锆合金基体上制备了不同Al含量的AlNbTiZr中熵合金（MEA）涂层。研究了AlNbTiZr MEA涂层的形貌、微观结构、力学性能、表面润湿性和耐蚀性，以评估压水堆运行条件下锆合金包壳的表面保护行为。结果表明，所有涂层均为具有非晶态和体心立方结构纳米晶体的复合结构。随着Al含量的增加，弹性模量和硬度先降低后升高。与基体相比，涂层的疏水性增强。10.2 at.% Al的AlNbTiZr涂层具有最佳的耐蚀性和最小的氧渗透深度，这源于形成了由NbZrO和ZrO组成的更致密的氧化层。本研究为事故容错燃料含Al MEA涂层材料的设计与开发提供了改进思路。
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