高密度高温高熵合金与陶瓷共晶复合材料的研究进展  

Research Progress on High-Temperature High-Entropy Alloy and Ceramic Eutectic Composites with High Density

作　　者：沈强[1] 吴信婷 魏琴琴[1,2] 张建[1] 罗国强[1] SHEN Qiang;WU Xinting;WEI Qinqin;ZHANG Jian;LUO Guoqiang(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学,材料复合新技术国家重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《硅酸盐学报》2024年第2期463-473,共11页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51932006)。

摘　　要：高密度高温高熵合金与陶瓷共晶复合材料是一类由高熵合金与陶瓷组成的具有高密度和优异高温性能的共晶复合材料,兼顾高熵合金、陶瓷和共晶复合材料的性能优势,表现出优异的高温强度和良好的室温塑性,近年来得到广泛研究。本文总结了近年来高密度高温高熵合金与陶瓷共晶复合材料的研究现状,围绕共晶复合材料的成分组成、组织结构与材料性能的关系,从成分设计、元素组成、微观结构、室温和高温力学性能、高温抗氧化性、耐磨性和电化学腐蚀性能等方面综述了现有研究工作,并对其未来研发趋势进行了展望。With the rapid development of cutting-edge technology fields such as aerospace and defense,high-temperature structural materials are needed for key hot-end components.High-entropy alloy and ceramic eutectic composites are a kind of eutectic composites composed of high-entropy alloy and ceramic,having high density and high-temperature properties.The eutectic composites exhibit superior high-temperature strength and room-temperature plasticity via combining the performance advantages of high-entropy alloys,ceramics,and eutectic composites,which have attracted recent attention.High-temperature high-entropy alloy and ceramic eutectic composites are mainly composed of refractory metal elements and high-melting non-metallic elements such as C,Si and B,which have a high density up to 13.31 g/cm^(3).The phase composition and eutectic structure can be effectively predicted by a phase diagram software named CALPHAD,while the predicted difference in eutectic points originates from the limited simulation databases.The eutectic composites are composed of refractory body-centered cubic(BCC)high-entropy alloy and ceramic phase with a eutectic structure,in which the two phases exhibit a semi-coherent interface with a low interface energy and a high stability.After annealed at 1573 K for 168 h or deformed at 1473 K,the eutectic composite maintains a phase and structural stability.The high-temperature high-entropy alloy and ceramic eutectic composites have superior high-temperature strength and room-temperature plasticity via combining the synergistic effects from strong bonding interface,fine grain strengthening,and second phase strengthening,which are better than the reported high-temperature high-entropy alloys and their ceramic composites.In addition,the high-temperature high-entropy alloy and ceramic eutectic composites derived from the optimization of alloying elements also possess high-temperature oxidation resistance,wear resistance and corrosion resistance.Summary and prospects The high-temperature eutectic composites com

关 键 词：高熵合金 陶瓷 共晶结构 力学性能 

分 类 号：TG291[金属学及工艺—铸造]