Microstructures and Mechanical Properties of β-Sialon-cBN Composites

Abstract:

β-Sialon-cubic boron nitride (cBN) composites were prepared by the high temperature (1700°C) and high pressure (5GPa) sintering. β-Sialon chemical general composition can be represented as Si_6-zAl_zO_zN_{8 –z} (Z is the number of Al atoms which are substituted by Si atoms, and the range of z value is usually between 0-4.2[1].).The effects of different formula with corresponding to z values on microstructure and mechanical properties of β-Sialon-cBN composites were studied. The relative test results were verified by computer simulation. The study result showed: with the z values of β-Sialon increasing, the aluminum and oxygen content increased. The densification and mechanical properties of β-Sialon-cBN composites decreased gradually.

• Periodical: Key Engineering Materials (Volume 697)
• Pages: 515-520
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.697.515
• Online since: July 2016
• Authors: Xin Ze Wu, Yi Wu*, Jin Long Han, Tian Yu Shen
• Keywords: Mechanical Properties, Microstructure, β-Sialon-cBN

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