Contact damage of machinable aluminum nitride/boron nitride nanocomposites(<Feature>SiAlons and Non-oxides)

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概要

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• AlN/BN nanocomposites indicated such a unique property as machinable with high fracture strength. In order to investigate the deformation mechanism of AlN/BN nanocomposites, Hertzian contact tests were performed on monolithic AlN, and nanocomposite and microcomposite AlN/BN. The monolith and microcomposite comprised micro-sized grains of AlN and BN. In the microcomposite, plate-like BN particles preferentially oriented perpendicular to the hot-press direction. On the other hand, the nanocomposite showed a finer microstructure with fine BN particles and small matrix grains. These microstructural differences led to differences in the mechanism of contact damage. The damage of the monolithic AlN and the AlN/BN microcomposite exhibited collapsed Hertzian cone fracture and preferentially oriented large cracks perpendicular to the hot-press direction, whereas the damage observed in the nanocomposites appeared to be quasi-plastic deformation.

• 社団法人日本セラミックス協会の論文
• 2008-06-01

著者

• Sekino Tohru

  Inst. Of Multidisciplinary Res. For Advanced Materials Tohoku Univ.

• Sekino Tohru

  Institute Of Multidisciplinary Research For Advanced Materials Tohoku University

• Sekino Tohru

  Institute Of Multidisciplinary Research For Advanced Materials (imram) Tohoku University

• Ando Yoichi

  Institute Of Scientific And Industrial Research Osaka University

• KUSUNOSE Takafumi

  Institute of Scientific and Industrial Research, Osaka University

• Kusunose Takafumi

  The Inst. Of Scientific And Industrial Res. Osaka Univ.

• Ando Yoichi

  Institute Of Industrial And Scientific Research Osaka University

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