碳化硼对高熵合金结构及性能的影响

doi:10.13251/j.issn.0254-6051.2020.06.036

金属热处理 ›› 2020, Vol. 45 ›› Issue (6): 173-177.DOI: 10.13251/j.issn.0254-6051.2020.06.036

碳化硼对高熵合金结构及性能的影响

张洁, 程晓农, 罗锐, 刘明

江苏大学材料科学与工程学院, 江苏镇江 212013

收稿日期:2019-12-10 出版日期:2020-06-25 发布日期:2020-09-02
通讯作者: 程晓农,教授,博士,E-mail:Chengxiaonong@hotmail.com
作者简介:张洁(1995—),女,硕士研究生,主要研究方向为金属材料,E-mail:ZhangJie_Sylvia@outlook.com。
基金资助:
江苏省重点研发计划(产业前瞻与共性关键技术)(BE2017127);江苏省研究生实践创新项目(SJCX18_0728)

Effect of B₄C on microstructure and properties of high-entropy alloy

Zhang Jie, Cheng Xiaonong, Luo Rui, Liu Ming

School of Materials Science and Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China

Received:2019-12-10 Online:2020-06-25 Published:2020-09-02

摘要/Abstract

摘要： 采用微波烧结工艺制备B₄C/FeCoNiCrAl与B₄C/FeCoNiCrCu高熵合金基复合材料,研究了不同含量的B₄C对FeCoNiCrAl、FeCoNiCrCu高熵合金组织结构和性能的影响。结果表明:B₄C的添加一定程度上增加了基体合金的晶格畸变,合金微观组织由高熵合金基底区、碳化硼分解生成的硼化物区和碳化物区3部分构成。体心立方结构的FeCoNiCrAl高熵合金中硼化物为针状,面心立方结构FeCoNiCrCu高熵合金中硼化物组织为块状,这与合金体系中的原子尺寸差相关。B₄C可显著提高合金的强度和硬度,塑性略有下降。4%B₄C/FeCoNiCrAl合金复合材料具有最高的硬度和压缩强度值,分别为627.1 HV0.5和1836 MPa,但是塑性较差,压缩比仅为11%;而4%B₄C/FeCoNiCrCu合金复合材料硬度与强度仅为249.3 HV0.5与1413 MPa,低于4%B₄C/FeCoNiCrAl复合材料,但塑性较好,压缩比可达35%。

关键词: B₄C, 高熵合金, 微波烧结, 结构, 性能

Abstract: High entropy alloy matrix composites B₄C/FeCoNiCrAl and B₄C/FeCoNiCrCu were prepared by microwave sintering process. The effects of different contents of B₄C on the microstructure and properties of high-entropy alloy were investigated. The results show that the addition of B₄C increases the lattice distortion of matrix alloy to a certain extent. The microstructure of the alloy consists of a high-entropy alloy basement region, a boride region formed by decomposition of boron carbide, and a carbide region. The boride of the body-centered cubic FeCoNiCrAl high-entropy alloy is needle-like, and the high-entropy alloy boride structure of the face-centered cubic structure FeCoNiCrCu is block-shaped, which is related to the atomic size difference in the alloy system. B₄C can significantly improve the strength and hardness of the alloy, and the plasticity decreases slightly. The 4% B₄C/FeCoNiCrAl alloy composite presents the highest hardness and compressive strength values of 627.1 HV0.5 and 1836 MPa, respectively, but the plasticity is poor, and the compression ratio is only 11%. The hardness and strength of the 4% B₄C/FeCoNiCrCu alloy composite are only 249.3 HV0.5 and 1413 MPa, which are lower than that of 4% B₄C/FeCoNiCrAl alloy composite, but the plasticity is good and the compression ratio can reach 35%.

Key words: B₄C, high-entropy alloy, microwave sintering, microstructure, properties

中图分类号:

TG113
TG146

张洁, 程晓农, 罗锐, 刘明. 碳化硼对高熵合金结构及性能的影响[J]. 金属热处理, 2020, 45(6): 173-177.

Zhang Jie, Cheng Xiaonong, Luo Rui, Liu Ming. Effect of B₄C on microstructure and properties of high-entropy alloy[J]. Heat Treatment of Metals, 2020, 45(6): 173-177.

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碳化硼对高熵合金结构及性能的影响

Effect of B₄C on microstructure and properties of high-entropy alloy

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碳化硼对高熵合金结构及性能的影响

Effect of B4C on microstructure and properties of high-entropy alloy

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Effect of B₄C on microstructure and properties of high-entropy alloy