The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Effect of $Mo_2C$ Content on the Microstructure and Properties of Ti(CN)-$Mo_2C$ Ceramics

  • Park, Dong-Soo (Ceramic Materials Group, Korea Institute of Machinery and Materials) ;
  • Lee, Yang-Doo (Ceramic Materials Group, Korea Institute of Machinery and Materials) ;
  • Taejoo Jung (Production Engineering Center, Materials Development Division Korloy Inc.)
  • Published : 1999.09.01
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Abstract

Ti(CN)-0.3mole% $Mo_2C$ ceramics were prepared by pressureless sintering. $Mo_2C$ dissolved in Ti(CN) more easily in a nitrogen environment than in the other environment because nitrogen forced Mo to form a solid solution, (Ti, No)(C, N). A "core-rim" structure developed within the grains. The boundary between the "core" and the rim was delineated by thermal etching in the sample with more than 2 mole% $Mo_2C$. The rim thickness and the grain size decreased as the $Mo_2C$ content increased. The hardness and the flexural strength showed maxima of 18.2 GPa and 1.23 GPa, respectively when the $Mo_2C$ content was 2 mole%. The post-sintering heat treatments improved the properties.oved the properties.

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References

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