Contact damage of silicon carbide/boron nitride nanocomposites

Takafumi Kusunose, Tohru Sekino, Koichi Niihara

研究成果: Article査読

9 被引用数 (Scopus)


To investigate the deformation mechanism of silicon carbide (SiC)/boron nitride (BN) nanocomposites, Hertzian contact tests were performed on monolithic SiC, and nanocomposite and microcomposite SiC/BN. Monolithic SiC had the typical microstructure of hot-pressed SiC with Y2O3 and Al2O3 additives, composed of slightly large grains in small matrix grains. The microcomposite comprised large BN grains dispersed along the grain boundaries of elongated SiC grains, while 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 SiC and the SiC/BN microcomposite exhibited classical Hertzian cone fracture and many large cracks, whereas the damage observed in the nanocomposites appeared to be quasi-plastic deformation.

ジャーナルJournal of the American Ceramic Society
出版ステータスPublished - 2007 10 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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