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The wear of polycrystalline diamond tools used in the cutting of metal matrix composites

1999; Elsevier BV; Volume: 17; Issue: 1-3 Linguagem: Inglês

10.1016/s0263-4368(98)00040-7

0263-4368

R. M. Hooper, J.L. Henshall, A Klopfer,

Advanced machining processes and optimization

Polycrystalline diamond (PCD) has been used for some years for the machining of abrasive systems such as aluminium/silicon and glass filled polymeric materials. This paper reports on the machining of the highly abrasive composite system of aluminium reinforced by silicon carbide particles and/or alumina fibres using polycrystalline diamond tools. The results indicate that polycrystalline diamond tooling offers superior performance over carbide, both in wear resistance and the quality of the surface finish produced. Observations of the morphology of the wear scars on the tools indicate that the wear process involves both adhesive wear and of the build up of defects within the diamond particles leading to eventual micro- and macro-fracture in a fatigue-like process.