Thermo-Mechanical Properties and Microstructure of Al2O3-SiC-SiAlON Composites

Abstract:

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The composite specimens have been prepared using fused corundum, silicon and bauxite-based β-SiAlON powder as starting materials. The physical properties, high temperature modulus of rupture (HMOR), thermal shock resistance (TSR), phase composition and microstructure of the specimens after firing at 1500°C have been studied. The results show: (1) Al2O3-SiC-SiAlON composites are sintered well at 1500°C. (2) HMOR and TSR of the specimens increase with increase of Si content, high temperature properties are further increased with appropriate β-SiAlON addition. (3) The in-situ formed SiC and O’-SiAlON fill in the interstices of corundum skeleton structure, forming interlocking network structure, thus creating strengthening and toughening effects.

Info:

Periodical:

Advanced Materials Research (Volumes 295-297)

Edited by:

Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu

Pages:

161-164

DOI:

10.4028/www.scientific.net/AMR.295-297.161

Citation:

X. H. Liu et al., "Thermo-Mechanical Properties and Microstructure of Al2O3-SiC-SiAlON Composites", Advanced Materials Research, Vols. 295-297, pp. 161-164, 2011

Online since:

July 2011

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Price:

$35.00

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