Nitride based ceramic nanocomposites with multifunctionality

Takafumi Kusunose; Tohru Sekino; Koichi Niihara

Nitride based ceramic nanocomposites with multifunctionality

Takafumi Kusunose, Tohru Sekino, Koichi Niihara

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Proceedings of The Seventeenth 2007 International Offshore and Polar Engineering Conference, ISOPE 2007
Pages	2907-2911
Number of pages	5
Publication status	Published - 2007 Dec 3
Event	17th 2007 International Offshore and Polar Engineering Conference, ISOPE 2007 - Lisbon, Portugal Duration: 2007 Jul 1 → 2007 Jul 6

Publication series

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

Other

Other	17th 2007 International Offshore and Polar Engineering Conference, ISOPE 2007
Country	Portugal
City	Lisbon
Period	07/7/1 → 07/7/6

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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Nitride based ceramic nanocomposites with multifunctionality. / Kusunose, Takafumi; Sekino, Tohru; Niihara, Koichi.

Proceedings of The Seventeenth 2007 International Offshore and Polar Engineering Conference, ISOPE 2007. 2007. p. 2907-2911 (Proceedings of the International Offshore and Polar Engineering Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kusunose, T, Sekino, T & Niihara, K 2007, Nitride based ceramic nanocomposites with multifunctionality. in Proceedings of The Seventeenth 2007 International Offshore and Polar Engineering Conference, ISOPE 2007. Proceedings of the International Offshore and Polar Engineering Conference, pp. 2907-2911, 17th 2007 International Offshore and Polar Engineering Conference, ISOPE 2007, Lisbon, Portugal, 07/7/1.

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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.",

keywords = "Aluminum nitride, Boron nitride, Electric discharge machining, Electrical conductivity, Machinability, Thermal conductivity",

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N2 - 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.

AB - 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.

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