Surface Modification of Al2O3/TiC Cutting Ceramics

Cutting ceramics with a graded TiC‐rich surface have been obtained by an in situ reaction. Al2O3/TiC ceramics, prepared by reaction sintering, have been subjected to various thermal posttreatments at atmospheric pressure. The temperature, dwelling time, and reaction atmosphere have been varied. It h...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2007-12, Vol.90 (12), p.3773-3778
Main Authors: Zimmermann, Katrin, Schneider, Gerold A., Bhattacharya, Anup K., Hintze, Wolfgang
Format: Article
Language:English
Subjects:
Abrasives and cutting tools
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Cermets, ceramic and refractory composites
Chemical industry and chemicals
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Other materials
Physics
Specific materials
Technical ceramics
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Summary:Cutting ceramics with a graded TiC‐rich surface have been obtained by an in situ reaction. Al2O3/TiC ceramics, prepared by reaction sintering, have been subjected to various thermal posttreatments at atmospheric pressure. The temperature, dwelling time, and reaction atmosphere have been varied. It has been observed that a TiC‐rich surface develops in CO‐containing atmospheres. The microstructure of the bulk remains unaffected. Thermal treatment under a CO atmosphere at 1600°C for 1 h resulted in a dense TiC layer on the ceramic. A schematic model is proposed for this layer formation process.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2007.02039.x