激光熔覆硬质颗粒增强高熵合金复合涂层研究进展

Research progress of hard particle reinforced high entropy alloy composite coatings fabricated by laser cladding

摘要:

高熵合金因其独特的合金设计理念及优异的综合性能，逐渐成为表面工程领域的热门涂层材料之一，而激光熔覆技术已成为高熵合金涂层制备的主要手段之一．目前，激光熔覆制备的面心立方（FCC）或体心立方（BCC）单相的高熵合金涂层，由于强度-塑性不匹配而导致涂层综合性能不佳，限制了其工程应用．由于硬质颗粒增强FCC结构高熵合金涂层是解决强度?塑性匹配的重要途径，成为国内外学者研究热点之一．重点介绍了直接添加和原位合成硬质颗粒增强高熵合金熔覆涂层的研究现状，分析了硬质颗粒增强高熵合金复合涂层性能的主要影响因素，并对未来硬质颗粒增强高熵合金涂层研究方向进行了展望．

Abstract:

High entropy alloy has gradually become one of the most popular coating materials in the field of surface engineering due to its unique alloy design concepts and excellent comprehensive properties．Laser cladding technology has become one of the main means of high entropy alloy coating preparation. At present， the comprehensive properties of face center cubic（FCC） or body centered cubic （BCC） single-phase high entropy alloy coating prepared by laser cladding are unsatisfactory due to the mismatch of strength and plasticity， which limits its engineering application. Hard particles can be used to enhance the high entropy alloy coating with FCC single-phase structure， so that its strength and plasticity can match， which has become one of the research hotspots in China and abroad. The way of adding hard particles can be divided into direct addition and in-situ synthesis. In this paper， the research status of direct addition and in-situ synthesis of hard particles reinforced high entropy alloy cladding coating is introduced. Influence factors of hard particles reinforced high entropy alloy composite coatings are analyzed and the future research directions of hard particles reinforced high entropy alloy coating are prospected.