期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 13, 期 -, 页码 1509-1520出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2021.05.084
关键词
Metal matrix composites; Microstructure; Mechanical properties
资金
- National Natural Science Foundation of China [U1664254, 51701085, 51371091]
- Postgraduate Research & Practice Innova-tion Program of Jiangsu Province [SJCX18_0730]
This study presents a novel method to enhance the density, interface bonding strength, and mechanical properties of B4Cp/Al composites by incorporating TiB2. The (TiB2p+B4Cp)/Al composites exhibit a clean interface and improved performance, with high compactness and compressive strength. The addition of TiB2 synergistically enhances densification and ameliorates interfaces and microstructure, leading to optimized composite properties.
This study demonstrates a novel method to improve the density, interface bonding strength and mechanical properties of the B4Cp/Al composites by directly adding TiB2 to the material. Specifically, the (TiB2p+B4Cp)/Al composites with different TiB2 contents were successfully fabricated by ball milling (BM) and microwave sintering (MS). The results indicate that the developed (TiB2p+B4Cp)/Al possess a clean interface, with the absence of any reaction, thus, confirming microwave sintering as one of the preferred ways to prepare the (TiB2p+B4Cp)/Al composites. On adding TiB2, the densification in the microstructure is noted to initially increase, followed by a decrease. Overall, the TiB2 and B4C particles are noted to synergistically improve the densification as well as ameliorate the interfaces and microstructure. As a result, the optimized composites exhibit the compactness and Vickers hardness as high as 94.6% and 153.42HV0.3 respectively. The highest value of the compressive strength is determined to be 578.71 MPa at 50.0%. Further, no macroscopic fracture is noted to occur after 50% compression strain. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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