Creep behavior of SiC whisker-reinforced Si3N4/BN fibrous monolithic ceramics

The flexural creep behaviour was studied in the temperature range 1000-1200 C and stress range 250-600 MPa. Creep curves generally showed extensive primary and lack of tertiary creep. The creep and fracture mechanisms were mainly controlled by the BN interlayer. BN began to oxidise at 1200 C and dec...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2001-06, Vol.21 (6), p.841-845
Main Authors: Li, Shuqin, Huang, Yong, Wang, Changan, Luo, Yongming, Zou, Linhua, Li, Cuiwei
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
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Summary:The flexural creep behaviour was studied in the temperature range 1000-1200 C and stress range 250-600 MPa. Creep curves generally showed extensive primary and lack of tertiary creep. The creep and fracture mechanisms were mainly controlled by the BN interlayer. BN began to oxidise at 1200 C and decreased the creep resistance. Meanwhile SiC whisker pullout improved the creep resistance. Microscopic damage mechanisms were investigated by SEM. 14 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(00)00251-X