Machinability of silicon nitride/boron nitride nanocomposites

Takafumi Kusunose, Tohru Sekino, Yong Ho Choa, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)

Abstract

The machinability and deformation mechanism of Si3N4/BN nanocomposites were investigated in the present work. The fracture strength of Si3N4/BN microcomposites remarkably decreased with increased hexagonal graphitic boron nitride (h-BN) content, although machinability was somewhat improved. However, the nanocomposites fabricated using the chemical method simultaneously had high fracture strength and good machinability. Hertzian contact tests were performed to clarify the deformation behavior by mechanical shock. As a result of this test, the damage of the monolithic Si3N4 and Si3N4/BN microcomposites indicated a classical Hertzian cone fracture and many large cracks, whereas the damage observed in the nanocomposites appeared to be quasi-plastic deformation.

Original languageEnglish
Pages (from-to)2689-2695
Number of pages7
JournalJournal of the American Ceramic Society
Volume85
Issue number11
Publication statusPublished - 2002 Nov 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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