Nitride based ceramic nanocomposites with multifunctionality

Takafumi Kusunose, Tohru Sekino, Koichi Niihara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Two types of Aluminum nitride (AlN) based ceramic nanocomposite with multifunctionality were investigated to improve machinability or electrical conductivity of AlN ceramics with high thermal conductivity. The AlN/BN nanocomposite was fabricated by pressureless sintering AlN-BN composite powder, which was prepared by reducing and heating AlN particles coated with a mixture of boric acid, urea and carbon. The nanocomposite containing 20 vol.% BN showed high strength, good machinability and relatively high thermal conductivity. On the other hand, the electrically conductive AlN ceramics with high thermal conductivity were attained by precipitating yttrium oxycarbide at grain boundaries. Their electrical conductivities were high enough to be machined by electric discharge machining.

Original languageEnglish
Title of host publicationProceedings of The Seventeenth 2007 International Offshore and Polar Engineering Conference, ISOPE 2007
Pages2907-2911
Number of pages5
Publication statusPublished - 2007 Dec 3
Event17th 2007 International Offshore and Polar Engineering Conference, ISOPE 2007 - Lisbon, Portugal
Duration: 2007 Jul 12007 Jul 6

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Other

Other17th 2007 International Offshore and Polar Engineering Conference, ISOPE 2007
CountryPortugal
CityLisbon
Period07/7/107/7/6

Keywords

  • Aluminum nitride
  • Boron nitride
  • Electric discharge machining
  • Electrical conductivity
  • Machinability
  • Thermal conductivity

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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