Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Effect of Oxygen Introduction on Oxidation Resistance and Cutting Performance of Silicon Nitride Ceramics

  • Nagano, Mituyoshi (Nippon Tungsten Co., Ltd.) ;
  • Sano, Hideaki (Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University) ;
  • Sakaguchi, Shigeya (Nippon Tungsten Co., Ltd.) ;
  • Zheng, Guo Bin (Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University) ;
  • Uchiyama, Yasuo (Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University)
  • Published : 2006.09.24
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Abstract

In order to clarify the wear resistance as cutting tools, the effect of oxygen addition on oxidation behavior of the ${\beta}-Si_3N_4$ ceramics with 5 mass% $Y_2O_3$ and 2 or 4 mass% $Al_2O_3$ was investigated by performing oxidation tests in air at $1300^{\circ}$ to $1400^{\circ}C$ and cutting performance tests. From test results, we could conclude that the mechanical properties of ${\beta}-Si_3N_4$ ceramics depending on oxygen introduction are much effective on cutting performance improvements of ${\beta}-Si_3N_4$ ceramics.

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