The effects of post heat-treatment on the microstructure and fracture behaviors of Yb2O3-doped Si3N4

Authors
Huang, JL Shih, ZH Lu, HH Chen, CY
Citation
Jl. Huang et al., The effects of post heat-treatment on the microstructure and fracture behaviors of Yb2O3-doped Si3N4, MATER CH PH, 63(2), 2000, pp. 116-121
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS CHEMISTRY AND PHYSICS
ISSN journal
02540584 → ACNP
Volume
63
Issue
2
Year of publication
2000
Pages
116 - 121
Database
ISI
SICI code
0254-0584(20000228)63:2<116:TEOPHO>2.0.ZU;2-G
Abstract
Silicon nitrides containing various compositions of Yb2O3 were investigated . The effects of post heat-treatment on the microstructure, grain boundary phases and high temperature strength were studied. The average grain size, and Yb:Si ratio in the amorphous pocket increased w ith the amount of Yb2O3 additives. The high temperature strength was substa ntially increased after post heat-treatment. This was attributed to the cry stallized grain boundary phases post heat-treatment. (C) 2000 Published by Elsevier Science S.A. All rights reserved.