Effects of Multi-Phase Reinforcements on Microstructures, Mechanical and Tribological Properties of Cu/Ti3SiC2/C/BN/GNPs Nanocomposites Sintered by Vacuum Hot-Pressing and Hot Isostatic Pressing

• Published in: Metals (Basel ) Vol. 6; no. 12; p. 324
• Main Authors: Shao, Zhenyi, Sun, Yue, Liu, Wanxia, Zhang, Xueqiao, Jiang, Xiaosong
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.12.2016
• Subjects: Bearing steels; Chromium steels; Compressive strength; Cu/Ti3SiC2/C/BN/GNPs nanocomposites; Diamond pyramid hardness; Graphene; Heat treating; Hot isostatic pressing; Mechanical properties; Microstructure; Multiphase; Nanocomposites; Optical microscopy; Platelets (materials); Reinforcement; Scanning electron microscopy; Shear strength; Sintering; Tensile strength; Titanium silicon carbide; Tribology; wear; Wear mechanisms
• ISSN: 2075-4701; 2075-4701
• DOI: 10.3390/met6120324

Cu/Ti3SiC2/C/BN/GNPs nanocomposites were prepared by vacuum hot-pressing (HP) sintering and hot isostatic pressing (HIP) sintering methods. Microstructures, mechanical and tribological properties of Cu/Ti3SiC2/C/BN/GNPs nanocomposites were investigated. Microstructures were examined by optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscope (SEM). Mechanical properties were determined by the relative density, micro-Vickers hardness, as well as tensile strength, compressive strength and shear strength. Tribological behavior of the Cu/Ti3SiC2/C/BN/GNPs composite against the GCr15 steel ring was evaluated using an M-2000 wear tester with high tangential sliding velocity. Results demonstrated that BN and graphene nano-platelets (GNPs) have an impact on the microstructures and mechanical properties of Cu/Ti3SiC2/C/BN/GNPs nanocomposites. Based on microstructures, and mechanical and tribological properties of Cu/Ti3SiC2/C/BN/GNP nanocomposites, strengthening, fracture and wear mechanisms for synergistic enhancement by multi-phase reinforcements were analyzed.