机械合金化和放电等离子烧结制备的CoCrNiCuZn高熵合金的相、微观结构及力学性能

Phases, Microstructures and Mechanical Properties of CoCrNiCuZn High-Entropy Alloy Prepared by Mechanical Alloying and Spark Plasma Sintering.

作者信息

Sun Yuchen, Ke Boren, Li Yulin, Yang Kai, Yang Mingqi, Ji Wei, Fu Zhengyi

机构信息

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Entropy (Basel). 2019 Jan 29;21(2):122. doi: 10.3390/e21020122.

DOI:10.3390/e21020122

PMID:33266838

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7514605/

Abstract

In the study, an equiatomic CoCrNiCuZn high-entropy alloy (HEA) was prepared by mechanical alloying (MA) and the phases, microstructures, and thermal properties of the alloy powder were explored. The results suggest that a solid solution with body-centered cubic (BCC) phase and a crystalline size of 10 nm formed after 60 h of milling. Subsequently, the alloy powder was consolidated by spark plasma sintering (SPS) at different temperatures (600 °C, 700 °C, 800 °C, and 900 °C). Two kinds of face-centered cubic (FCC) phases co-existed in the as-sintered samples. Besides, Vickers hardness and compressive strength of the consolidated alloy sintered at 900 °C were respectively 615 HV and 2121 MPa, indicating excellent mechanical properties.

摘要

在该研究中，通过机械合金化（MA）制备了一种等原子CoCrNiCuZn高熵合金（HEA），并对合金粉末的相、微观结构和热性能进行了探索。结果表明，球磨60小时后形成了具有体心立方（BCC）相且晶体尺寸为10 nm的固溶体。随后，通过火花等离子烧结（SPS）在不同温度（600℃、700℃、800℃和900℃）下对合金粉末进行固结。烧结态样品中存在两种面心立方（FCC）相。此外，在900℃烧结的固结合金的维氏硬度和抗压强度分别为615 HV和2121 MPa，表明其具有优异的力学性能。