Nd-doped beta/alpha-SiAlON composites and the instability of internal alpha-prime(Nd) phase at high temperature

Nd-doped beta/alpha-SiAlON composites with Si3N4-AlN-Nd2O3 composition and the behavior of its internal alpha-prime (Nd) phase were studied at high temperature, adding extra AlN to a constant ratio composition to understand the role of AlN in the densification of the material. It was found that only...

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Published inJournal of materials science letters Vol. 17; no. 20; pp. 1759 - 1763
Main Authors Kuang, Shao-Feng, Qi, Long-Hao, Huang, Zhen-Kun, Tien, Tseng-Ying
Format Journal Article
LanguageEnglish
Published 15.10.1998
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Summary:Nd-doped beta/alpha-SiAlON composites with Si3N4-AlN-Nd2O3 composition and the behavior of its internal alpha-prime (Nd) phase were studied at high temperature, adding extra AlN to a constant ratio composition to understand the role of AlN in the densification of the material. It was found that only a little AlN definitely raised the sinterability of Si3N4/Nd2O3 composition, and caused the formation of alpha(Nd)-SiAlON. Fully dense beta /alpha(Nd)-SiAlON composite with superior mechanical properties were obtained by hot pressing. These composites have a fine microstructure, with elongated rod-shaped grains of beta-SiAlON combining with the fine grains of alpha(ND)-SiAlON. (AIAA)
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0261-8028