Microstructure and sliding wear characterization of Cu/TiB2 copper matrix composites fabricated via friction stir processing

Journal of Asian Ceramic Societies

I. Dinaharan¹  S. Saravanakumar²  K. Kalaiselvan³  S. Gopalakrishnan⁴ 

[1] Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Kingsway Campus, Johannesburg 2006, South Africa;Department of Mechanical Engineering, Angel College of Engineering and Technology, Tirupur 641665, Tamil Nadu, India;Department of Mechanical Engineering, Dr. N.G.P. Institute of Technology, Coimbatore 641048, Tamil Nadu, India;Department of Mechanical Engineering, K.S. Rangasamy College of Technology, Tiruchengode 637215, Tamil Nadu, India;

关键词: Copper matrix composites;    Friction stir processing;    Microstructure;    Wear;   

DOI  :  10.1016/j.jascer.2017.06.002

来源: DOAJ

【 摘 要 】

The poor wear performance of copper is improved by reinforcing hard ceramic particles. The present work reports the fabrication of Cu/TiB2 (0, 6, 12, 18 vol.%) copper matrix composites (CMCs) using friction stir processing (FSP). TiB2 particles were initially packed together into a machined groove and were subjected to FSP under a constant set of process parameters. The microstructure was observed using optical, scanning and transmission electron microscopy. The wear behavior was examined using a pin-on-disc apparatus. The micrographs showed a homogeneous distribution of TiB2 particles without aggregation and segregation. The distribution of TiB2 particles was closely persistent across the stir zone. TiB2 particles were well bonded with the copper matrix without any interfacial reaction. Many TiB2 particles fractured during FSP. The grains in the composite were extensively refined because of dynamic recrystallization and pinning effect of TiB2 particles. The wear behavior under dry sliding condition was presented in detail.

【 授权许可】

Unknown