高熵合金涂层又称多主元合金涂层,是一种新型合金涂层.受高熵效应的影响,涂层的组织结构主要由单一的BCC、FCC或者HCP固溶体相构成,且易于形成非晶、纳米晶和纳米复合物,呈现出优异的综合力学性能、抗高温氧化性能、耐辐射性能和生物兼容性能等,具有重要的研究价值和应用前景.分别从涂层的主元数量和位形熵值两方面对高熵合金涂层的概念进行了阐述,比较分析了热喷涂、激光熔覆以及物理气相沉积等几类常用的高熵合金涂层制备工艺的优点和不足,总结了高熵合金涂层的工业应用现状,最后指出了高熵合金涂层在目前的研究中存在的问题并展望了其未来的发展方向.
High-entropy alloy coatings(HEACs), also known as multi-principal-element alloy coatings, are new kinds of alloy coatings which primarily composed by single BCC, FCC or HCP solid solution, and amorphous, nanocrystalline and nanocomposite can be easily obtained under the influence of high entropy effect.HEACs have excellent comprehensive mechanical properties, high temperature oxidation resistance, radiation resistance, biocompatibility and so forth, therefore they have high research value and great application prospects.The conception of HEACs are elaborated from two aspects, namely, the number of principal element and the value of configuration entropy of coatings.The advantage and disadvantage of thermal spray, laser cladding and physical vapor deposition process which are commonly used methods to prepare HEACs are analyzed and compared.The current application of HEACs in industry is introduced.Finally, the existing problems of the current research about HEACs are pointed out and the future development direction of HEACs is also proposed.
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