Physical properties and cutting performance of silicon nitride ceramic

Mikio Fukuhara, Kenji Fukazawa, Akira Fukawa

研究成果: Article査読

101 被引用数 (Scopus)


Silicon nitride, a nitrogen compound of highly covalent bond character, has low density, high hardness, low thermal expansion and high thermal conductivity and excellent oxidation and corrosion resistance. Therefore it is considered to be a promising material for high temperature engineering components. However, it has very poor sinterability compared with the conventional oxide ceramics owing to its low self-diffusivity. By investigating starting materials, sintering additives and processing, a hot-pressed silicon nitride ceramic having grains enveloped by crystalline boundary phases can be produced. The silicon-nitride-based ceramic has high strength, high Weibull modulus, fracture toughness and thermal conductivity, and low thermal expansion compared with existing cutting tool ceramics such as Al2O3 + TiC, and it is expected to have superior thermal shock resistance. This new ceramic cutting tool shows superior performance in cutting cast irons at high speeds (10-16.75 m s-1 (600-1000 m min-1)) and rates (about 1.0 mm rev-1), where conventional tools cannot be used.

出版ステータスPublished - 1985 4月 1

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学


「Physical properties and cutting performance of silicon nitride ceramic」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。