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Fabrication of Al2O3/BN Nanocomposites by Chemical Processing and Their Mechanical Properties

Published online by Cambridge University Press:  03 March 2011

Takafumi Kusunose ,
Yoon-Ho Kim ,
Tohru Sekino ,
Takuya Matsumoto ,
Norihito Tanaka ,
Tadachika Nakayama  and
Koichi Niihara
Takafumi Kusunose*
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
Yoon-Ho Kim
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
Tohru Sekino
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
Takuya Matsumoto
Affiliation:
Division of Biomaterials Science, Graduate School of Dentistry, Osaka University, Suita, Osaka 565-0871, Japan
Norihito Tanaka
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
Tadachika Nakayama
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
Koichi Niihara
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
*
a)Address all correspondence to this author. e-mail: kusuno15@sanken.osaka-u.ac.jp
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Abstract

Al2O3/BN nanocomposites were fabricated through a novel chemical route involving hot-pressing of α–Al2O3 powders covered partly with turbostratic BN (t-BN). The nano-sized hexagonal BN (h-BN) particles were found to be homogeneously dispersed within the Al2O3 grains as well as at grain boundaries, which is indicative of nanocomposite structures. Thus, the present nanocomposites exhibited the unique properties of high strength and low Young’s modulus associated with nanocomposites. This paper discusses in detail the synthesis process and microstructural features of these materials.

Keywords

CeramicCompositePowder processing
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 1 , January 2005 , pp. 183 - 190
Copyright
Copyright © Materials Research Society 2004

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References

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