The effects of SiCp addition on the z-value and mechanical properties of β-Sialon–SiCp refractories

Zhaohui HUANG; Juntong HUANG; Minghao FANG; Saifang HUANG; Yan’gai LIU; Xiaoxian WU; Jingzhou YANG

doi:10.2109/jcersj2.120.387

Papers

The effects of SiC_p addition on the z-value and mechanical properties of β-Sialon–SiC_p refractories

Zhaohui HUANG, Juntong HUANG, Minghao FANG, Saifang HUANG, Yan’gai LIU, Xiaoxian WU, Jingzhou YANG

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Keywords: β-Sialon–SiC_p, z-Value, Microstructure, Mechanical properties, Refractories

JOURNAL FREE ACCESS

2012 Volume 120 Issue 1406 Pages 387-392

DOI https://doi.org/10.2109/jcersj2.120.387

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Abstract

The effects of SiC_p addition on the z-value, microstructure and mechanical properties of β-Si₆₋_zAl_zO_zN₈₋_z–SiC_p were investigated. The results showed that z-value of β-Sialon decreased from 2.66 to 1.20 with the increase of SiC_p addition, while the apparent porosity of β-Sialon–SiC_p composites increased. The bending strength and compressive strength decreased due to the increase of the apparent porosity and the weak cohesion resulted from the thermal expansion coefficient mismatch between SiC_p and β-Sialon matrix. Moreover, a linear regression model used to identify the relationship between the content of SiC and z value of β-Sialon is fitted.

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