Preparation and properties of TiC-Ni cermets using Ni-plated TiC |
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Authors: | Soon-Gi Shin |
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Affiliation: | (1) Division of Metallurgical and Materials, and Chemical Engineering, Dong-A University, 840 Hadan 2-dong, Saha-ku, 604-714 Busan, Korea |
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Abstract: | TiC powders were coated with Ni by a chemical plating technique and the pressed compacts sintered at 1623K. The density of
the sintered bodies was 98–99%. Compared with mechanically-mixed powder, Ni-plated TiC powders gave a more uniform microstructure
in which TiC particles were well dispersed in the Ni matrix. The cermets exhibited ductile fracture for TiC-70 vol.% Ni and
brittle fracture for TiC-30 vol.% Ni. The flexural strength was improved by the homogeneous dispersion of TiC. The thermal
expansion coefficient increased with a decrease in Ni content, following a nearly linear law of mixtures on the basis of volume
fractions of pure TiC and Ni. |
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Keywords: | cermet plated powder mechanical properties thermal expansion coefficient |
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