联合添加微量Sc、Zr元素对B4C/7075Al复合材料力学性能和腐蚀行为的影响

韩慧敏, 姜龙涛, 晁振龙, 韩秉卓, 王春雨

doi:10.16577/j.issn.1001-1560.2024.0076

材料保护 >

2024 , Vol. 57 >Issue 4: 36 - 46

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0076

研究篇

联合添加微量Sc、Zr元素对B₄C/7075Al复合材料力学性能和腐蚀行为的影响

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（1. 哈尔滨工业大学材料科学与工程学院, 黑龙江哈尔滨150001;
2. 哈尔滨工业大学（威海）材料科学与工程学院, 山东威海264209）

姜龙涛（1973-），博士，教授，研究方向为颗粒增强金属基复合材料基础理论与应用，电话：18845610821，E-mail: longtaojiang@163.com；
晁振龙（1994-），博士，副教授，研究方向为装甲用金属基复合材料，电话：15304503033，E-mail: chaozhenlong@hit.edu.cn

收稿日期: 2023-08-05

修回日期: 2023-10-10

录用日期: 2023-10-20

网络出版日期: 2024-04-30

基金资助

国家自然科学基金资助项目（52101172）

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Effect of Combined Addition of Trace Sc and Zr Elements on Mechanical Properties and Corrosion Behavior of B₄C/7075Al Composite

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(1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology (Weihai), Weihai 264209, China)

JIANG Longtao(1973-), Ph.D., Professor, Research Focus: Basic Theory and Application of Particle-Reinforced Metal Matrix Composites, Tel.: 18845610821, E-mail: longtaojiang@163.com;
CHAO Zhenlong(1994-), Ph.D., Associate Professor, Research Focus: Metal Matrix Composites for Armor, Tel.: 15304503033, E-mail: chaozhenlong@hit.edu.cn

Received date: 2023-08-05

Revised date: 2023-10-10

Accepted date: 2023-10-20

Online published: 2024-04-30

Supported by

National Natural Science Foundation of China (No. 52101172)

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摘要

限制高强度B₄C/Al复合材料工程应用的关键为腐蚀问题，添加微量合金元素是提高其耐蚀性的有效措施。采用压力浸渗法制备了B₄C/7075和添加微量Sc、Zr元素的B₄C/7075-0.15Sc-0.35Zr复合材料，利用扫描电镜、透射电镜、弯曲性能测试、拉伸性能测试、中性盐雾试验和电化学测试对比研究了联合添加Sc和Zr元素对B₄C/7075Al复合材料的显微组织、力学性能和腐蚀行为的影响。结果表明：添加Sc和Zr元素后，复合材料的抗弯曲强度和抗拉强度升高，腐蚀速率降低，腐蚀电流密度(J_corr)下降，耐蚀性增强，这是因为添加Sc和Zr元素后，复合材料的晶界析出相细小且不连续分布，无析出带(PFZ)消失。

关键词： B₄C/7075复合材料; Sc; Zr; 力学性能; 腐蚀行为; 无析出带

本文引用格式

韩慧敏, 姜龙涛, 晁振龙, 韩秉卓, 王春雨 . 联合添加微量Sc、Zr元素对B₄C/7075Al复合材料力学性能和腐蚀行为的影响[J]. 材料保护, 2024 , 57(4) : 36 -46 . DOI: 10.16577/j.issn.1001-1560.2024.0076

Abstract

The key to restrict the engineering application of high-strength B₄C/Al composites is corrosion, and adding trace alloying elements is an effective measure to improve corrosion resistance. In this work, the B₄C/7075 and B₄C/7075-0.15Sc-0.35Zr composite containing trace Sc and Zr elements were prepared by pressure infiltration. The influence of combined addition of Sc and Zr on microstructure, mechanical properties and corrosion behavior of B₄C/7075 composites was investigated by using scanning electron microscopy, transmission electron microscopy, bending performance testing, tensile performance testing, neutral salt spray testing and electrochemical testing. Results showed that adding Sc and Zr elements to B₄C/7075 composites, the higher bending strength and tensile strength values were obtained in B₄C/7075-0.15Sc-0.35Zr. In addition, the corrosion rate and the corrosion current(J_corr) decreased, indicating that the corrosion resistance of B₄C/Al composite increased, which might be caused by that the grain boundary precipitates in the composite material were small and discontinuous after adding Sc and Zr elements, and the precipitate free zone(PFZ) disappeared.

Key words：

B₄C/7075 composite

; Sc; Zr; mechanical properties; corrosion behavior; PFZ

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