Property Characteristics of a TiB_2P/Al Composite Fabricated by Squeeze Casting Technology

Min ZHAO, Gaohui WU, Zuoyong DOU and Longtao JIANG School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

摘 要：<正>TiB2P/AI composite was successfully fabricated by squeeze casting technology. Its mechanical and tribological properties were evaluated. The elimination of Ti-AI intermetallic compound was confirmed by X-ray diffraction （XRD） studies. At 45% volume fraction, the bending strength at ambient temperature was 934 MPa. And the fracture modes included ductile failure of Al matrix and brittle fracture of TiB2 particles. In dry sliding wear mode, severe plastic deformation and adhesive wear were found on the worn surfaces of the SiCP/AI composite. But no obvious characteristics of adhesion or abrasion wear were observed on that of the TiB2P/AI composites. At the steady stage, the friction coefficient of the SiCP/AI composite was about 0.6. While that of TiB2P/AI composite was only about 0.16-0.17.

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