Effect of Cr3C2 Addition on the Sintering of SiC-TiC Composite

The densification behavior and mechanical properties of SiC‐30TiC (in volume percent) composites prepared with Cr3C2 additive were investigated. By hot‐pressing a SiC‐30TiC‐lCr3C2 specimen at 1950°C, 98.5% of theoretical density was achieved and the specimen exhibited a fracture strength of 750 MPa....

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1996-12, Vol.79 (12), p.3305-3308
Main Authors: Chae, Ki-Woong, Niihara, Koichi, Kim, Doh-Yeon
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
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Summary:The densification behavior and mechanical properties of SiC‐30TiC (in volume percent) composites prepared with Cr3C2 additive were investigated. By hot‐pressing a SiC‐30TiC‐lCr3C2 specimen at 1950°C, 98.5% of theoretical density was achieved and the specimen exhibited a fracture strength of 750 MPa. For the SiC‐30TiC‐10Cr3C2 specimen, (β‐α transformation of SiC was observed to occur during hot‐pressing and in situ growth of elongated α‐SiC grains resulted in an increase of fracture toughness. Micro‐structural observations using high‐resolution TEM indi‐cated that no liquid phase was present at the interfaces.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1996.tb08109.x