ISSN:1000-8365 CN:61-1134/TG
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Effects of the Layer Thickness Ratio on the Microstructure and Mechanical Properties of Cu-TiB2/Cu Layered Composites
Author of the article:CAO Fei1, 2, CAI Lei1, HAN Fei1, ZHANG Hanxiao1, LIU Nan1, XIE Zhangle1, JIANG Yihui1, 2
Author's Workplace:1. Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, Engineering Research Center of Conducting Materials and Composite Technology, Ministry of Education, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China; 2. Xi'an University of Technology, Xi'an Zhitong Automation Technology Development Company, Xi'an 710048, China
Key Words:Cu-TiB2/Cu composite; layered structure; microstructure; strength and plasticity
Abstract:

Copper matrix composites with excellent comprehensive properties have potential applications in electronic packaging, electrical contact and other fields. However, overcoming the strength-plasticity inversion relationship of materials has always been a great challenge, and designing a layered configuration is considered to be an effective strategy for solving the inversion problem. In this work, Cu-TiB2/Cu layered composites with overlapping Cu layer and TiB2/Cu composite layer were prepared by powder metallurgy and in situ reaction methods. The tensile properties and fracture characteristics of the Cu-TiB2/Cu layered composites were studied, and the effect of the layered structural parameters on the composite properties was discussed. When the thickness ratio of the Cu layer to the TiB2/Cu composite layer is 13, the ultimate tensile strength(UTS) of the Cu-TiB2/Cu laminated composite is 315 MPa, and the elongation at break is 18%, which indicates good strong plastic matching. Based on the characterization and analysis of the crack propagation paths of composite materials, the mechanism through which layered configuration design inhibits crack propagation and promotes crack deflection is revealed. This study provides a new idea for the configuration design and performance optimization of copper matrix composites with high strength and plasticity.