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

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...

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Bibliographic Details
Published inJournal of materials research Vol. 19; no. 5; pp. 1432 - 1438
Main Authors Kusunose, Takafumi, Sung, Rak-Joo, Sekino, Tohru, Sakaguchi, Shuji, Niihara, Koichi
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 01.05.2004
Subjects
Ceramic
Composite
Mechanical properties
Composite
Mechanical properties
Ceramic
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Summary: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.
Bibliography:istex:C204D9D88270230D60AF213012D2761DF346F7D2
PII:S0884291400088701
ark:/67375/6GQ-6MJN270X-4
ArticleID:08870
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2004.0192