UNSPECIFIED (1997) Microstructure and properties of MoSi2-SiC and MoSi2-Si3N4 composites. In: 1st International Conference on Ceramic and Metal Matrix Composites (CMMC 96), SEP 09-12, 1996, SAN SEBASTIAN, SPAIN.

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Abstract

This paper will describe part of the work carried out on the fabrication and properties of MoSi2 based composites for potential use in the gas industry. MoSi2 and MoSi2 based composites with 10 and 20vol% of SiC and Si3N4 reinforcement have been fabricated by pressureless sintering. This resulted in high density MoSi2 (similar to 97.6%T.D.) and 10vol% reinforcement added composites with densities >90%T.D. However, 20vol% addition composites had lower densities and this was reflected in their mechanical and thermal screening test performances. Room temperature flexure testing indicated that the MoSi, fabricated had a strength similar to that reported by other researchers and a comparable strength to commercial materials (Kanthal Super 1700 and Super 1800). The strength of the composites was lower reflecting the lower densities of these materials and this was particularly true of the 20vol% addition materials. Post mechanical evaluation of materials after thermal cycling and simulated combustion gas corrosion tests indicated no significant degradation in mechanical properties for the fabricated and Kanthal materials. Microstructural analysis of the thermally tested materials indicated the formation of a passive SiO2 surface layer.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TP Chemical technology T Technology > TA Engineering (General). Civil engineering (General)
Series Name:	KEY ENGINEERING MATERIALS
Journal or Publication Title:	CMMC 96 - PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON CERAMIC AND METAL MATRIX COMPOSITES, PTS 1 AND 2
Publisher:	TRANS TECH PUBLICATIONS
ISBN:	0-87849-753-6
ISSN:	1013-9826
Editor:	Fuentes, M and MartinezEsnaola, JM and Daniel, AM
Date:	1997
Volume:	127-
Number:	Part 1 & 2
Number of Pages:	8
Page Range:	pp. 877-884
Publication Status:	Published
Title of Event:	1st International Conference on Ceramic and Metal Matrix Composites (CMMC 96)
Location of Event:	SAN SEBASTIAN, SPAIN
Date(s) of Event:	SEP 09-12, 1996
URI:	http://wrap.warwick.ac.uk/id/eprint/17966

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