ANALYSIS OF SI3N4+BETA-SI3N4 WHISKER CERAMICS

被引：0
|
作者：
DUSZA, J
SAJGALIK, D
REECE, M
机构：
[1] SLOVAK ACAD SCI, CTR CHEM RES, INST INORGAN CHEM, CS-84236 BRATISLAVA, CZECHOSLOVAKIA
[2] NATL PHYS LAB, TEDDINGTON TW11 0LW, MIDDX, ENGLAND
来源：
JOURNAL OF MATERIALS SCIENCE | 1991年 / 26卷 / 24期
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D O I：
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dense Si3N4 + beta-Si3N4 whisker composite ceramics were fabricated by hot pressing powder-whisker mixtures. Addition of beta-Si3N4 whiskers had no significant influence on the densification behaviour for up to 20 wt % addition. Light microscopy and scanning and transmission electron microscopy were used to study their microstructure and fracture behaviour. An increase in fracture toughness was observed for beta-Si3N4 whisker additions of up to 10%. The main toughening mechanisms observed were crack deflection, crack branching, whisker-matrix debonding and whisker pull-out.
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页码：6782 / 6788
页数：7
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