Superfunctional high-entropy alloys and ceramics by severe plastic deformation  

作　　者：Parisa Edalati Masayoshi Fuji Kaveh Edalati 

机构地区：[1]Department of Life Science and Applied Chemistry,Nagoya Institute of Technology,Tajimi,507-0071,Japan [2]Advanced Ceramics Research Center,Nagoya Institute of Technology,Tajimi,507-0071,Japan [3]WPI International Institute for Carbon-Neutral Energy Research(WPI-I2CNER),Kyushu University,Fukuoka,819-0395,Japan [4]Mitsui Chemicals,Inc.—Carbon Neutral Research Center(MCI-CNRC),Kyushu University,Fukuoka,819-0395,Japan

出　　处：《Rare Metals》2023年第10期3246-3268,共23页稀有金属（英文版）

基　　金：the Hosokawa Powder Technology Foundation of Japan for a grant;supported by the MEXT, Japan through Grants-in-Aid for Scientific Research on Innovative Areas (Nos. JP19H05176 and JP21H00150);in part by the MEXT, Japan through Grant-in-Aid for Challenging Research Exploratory (No. JP22K18737)。

摘　　要：High-entropy alloys and ceramics containing at least five principal elements have recently received high attention for various mechanical and functional applications.The application of severe plastic deformation(SPD),particularly the high-pressure torsion method,combined with the CALPHAD(calculation of phase diagram) and first-principles calculations resulted in the development of numerous superfunctional high-entropy materials with superior properties compared to the normal functions of engineering materials.This article reviews the recent advances in the application of SPD to developing superfunctional high-entropy materials.These superfunctional properties include(ⅰ) ultrahigh hardness levels comparable to the hardness of ceramics in high-entropy alloys,(ⅱ) high yield strength and good hydrogen embrittlement resistance in high-entropy alloys;(ⅲ) high strength,low elastic modulus,and high biocompatibility in high-entropy alloys,(ⅳ) fast and reversible hydrogen storage in high-entropy hydrides,(ⅴ) photovoltaic performance and photocurrent generation on high-entropy semiconductors,(ⅵ) photocatalytic oxygen and hydrogen production from water splitting on high-entropy oxides and oxynitrides,and(ⅶ)CO_(2) photoreduction on high-entropy ceramics.These findings introduce SPD as not only a processing tool to improve the properties of existing high-entropy materials but also as a synthesis tool to produce novel high-entropy materials with superior properties compared with conventional engineering materials.

关 键 词：Multi-principal element alloys(MPEAs) High-entropy alloys(HEAs) High-entropy ceramics(HECs) High-entropy oxides(HEOs) Ultrafine-grained(UFG)microstructure High-pressure torsion(HPT) 

分 类 号：TG139[一般工业技术—材料科学与工程] TQ174.1[金属学及工艺—合金]