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

Xin Hong Liu; En Xia Xu; Chao Jie Zhou

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

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 295-297Thermo-Mechanical Properties and Microstructure of...

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

Abstract:

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.

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Periodical:

Advanced Materials Research (Volumes 295-297)

Pages:

161-164

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.295-297.161

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Online since:

July 2011

Authors:

Xin Hong Liu, En Xia Xu, Chao Jie Zhou

Keywords:

Al₂O₃-SiC-SiAlON Composites, Microstructure, Silicon Carbide (SiC), ß-SiAlON, Thermo-Mechanical Properties

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