Microstructure and Mechanical Properties of Fine Structured B4C/2024 Al Composites with High B4C Content

被引：5
|
作者：
Zheng, Ruixiao [1 ]
Ma, Fengmei [1 ]
Zhang, Yitan [1 ]
Ma, Chaoli [1 ]
机构：
[1] Beihang Univ, Key Lab Aerosp Adv Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2017年 / 19卷 / 07期
基金：
中国国家自然科学基金;
关键词：
METAL-MATRIX COMPOSITES; HIGH-VOLUME FRACTION; ALUMINUM COMPOSITES; REINFORCED ALUMINUM; HOT EXTRUSION; STRENGTH; ALLOY; PARTICLES; BEHAVIOR; FABRICATION;
D O I：
10.1002/adem.201700047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, bulk fine structured B4C/2024 Al composites with various B4C content are prepared by mechanical milling and subsequent hot consolidation. Scanning electron microscopy (SEM) observation revealed that the higher the B4C content, the finer the B4C particle size in the bulk composites. Transmission electron microscopy (TEM) observation indicates that the grain size of the Al matrix around the B4C particles is much finer compared to other, area due to the large difference in coefficients of thermal expansion (CTE) between the Al matrix and the B4C particles. Room temperature compression test reveals that with increasing B4C content, the compression strength of the bulk samples first increases and then decreases. The significant change of the mechanical properties is discussed based on the microstructure observed.
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收藏
页数：6
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