摘要
高熵合金具有许多诸如高强度、高硬度、抗氧化等优异的性能,使它在诸多领域有着广泛的应用.随着高熵合金的广泛应用,通过多主元成分设计,增加构型熵,利用高熵合金的特性也被用来调控热电材料的性能.综述了常见的高熵热电材料的发展现状,分析高熵对热电性能的解耦前景.通过分析Ⅳ-Ⅵ族热电材料、类液态材料、Half-heusler合金等材料中熵工程的应用,总结了高熵对热电性能的影响.通过合金化、高熵效应,结合类液效应、固溶量、共振掺杂、纳米沉淀和构建自适应亚晶格等调控手段,可以显著改善热电材料的性能,并为发展更为高效的热电转换材料提供了新的方向.
Abstract
High-entropy alloys have excellent properties such as high strength,high hardness and oxi-dation resistance,making them widely used in various fields.With the extensive application of high-entropy alloys,the design of multi-principal element compositions to increase the configurational entropy and exploit the properties of high-entropy alloys has also been used to control the performance of thermoelectric materials.This article reviews the current development status of common high-entropy thermoelectric materials and analy-ses the prospects of decoupling the effect of entropy on thermoelectric performance.By analysing the applica-tion of entropy engineering in thermoelectric materials such as Ⅳ-Ⅵ group materials,liquid-like materials,half-Heusler alloys,etc,the influence of high entropy on thermoelectric performance is summarised.Through alloying,high entropy effects,liquid-like effects,solid solution amount,resonance doping,nanoprecipitation,and the construction of adaptive sublattices,the performance of thermoelectric materials can be significantly improved,opening up new directions for the development of more efficient thermoelectric conversion materials.
维普
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