Influence of SiC on the Properties of PcBN Cutting Tools Fabricated by High Pressure and High Temperature Sintering

Abstract:

SiC-Al₃BC₃-cBN composites with different contents of cBN were fabricated by high pressure and high temperature sintering (HPHT) at 1450 °C for 3 min under a pressure of 5.0 GPa using SiC, Al, B₄C and C as additives. The effect of SiC content on the density and mechanical properties of SiC-Al₃BC₃-cBN composites was investigated. X-ray diffraction (XRD) and Scanning electron microscope (SEM) were used to analyze phases and micro-structure of the sintered samples. The hardness of SiC-Al₃BC₃-cBN composites decreased with the increasing of SiC content, However, the fracture strength of SiC-Al₃BC₃-cBN composites increased with the increasing of SiC content.

• Periodical: Key Engineering Materials (Volume 697)
• Pages: 526-529
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.697.526
• Online since: July 2016
• Authors: Shi Xun Zhang, Jian Li, Yao Ma, Hai Long Wang*, Rui Zhang
• Keywords: High Pressure High Temperature (HPHT) Sintering, Mechanical Properties, PCBN, SiC

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