High-temperature properties of a silicon nitride/boron nitride nanocomposite

Takafumi Kusunose, Rak Joo Sung, Tohru Sekino, Shugi Sakaguchi, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Hexagonal graphitic BN (h-BN) is interesting as a second phase for high-temperature structural ceramics because it has the same crystal structure as graphite, for which fracture strength and Young's modulus increase with increased temperature. In this study, high-temperature mechanical properties of Si3N4/BN nanocomposite were evaluated to clarify the effect of fine h-BN particles at elevated temperatures. As a result, we found that high-temperature strength and hardness of the nanocomposite were maintained up to high temperatures; also, its Young's modulus increased gradually, concomitant with elevated temperatures up to 1400 °C. Finally, these properties were compared with those of monolithic Si3N4 and Si3N4/BN microcomposite.

Original languageEnglish
Pages (from-to)1432-1438
Number of pages7
JournalJournal of Materials Research
Volume19
Issue number5
DOIs
Publication statusPublished - 2004 May 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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