IN-SITU SYNTHESIS OF HIGH-PURITY ALPHA-SI3N4 WHISKERS FROM AMORPHOUS SI-N-C POWDERS

Authors
LI YL LIANG Y HU ZQ
Citation
Yl. Li et al., IN-SITU SYNTHESIS OF HIGH-PURITY ALPHA-SI3N4 WHISKERS FROM AMORPHOUS SI-N-C POWDERS, Materials letters, 21(3-4), 1994, pp. 325-328
Citations number
13
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
21
Issue
3-4
Year of publication
1994
Pages
325 - 328
Database
ISI
SICI code
0167-577X(1994)21:3-4<325:ISOHAW>2.0.ZU;2-9
Abstract
alpha-Si3N4 whiskers with diameters of 0.1-0.5 mum and lengths in the millimeter range were synthesized from organosilane-derived nanometer- sized amorphous Si-N-C powders at 1873 K in 1 atm of nitrogen. The whi skers nucleated on the alpha-Si3N4 grains crystallized from the Si-N-C powders and grew in situ by the vapor-solid (VS) mechanism. The absen ce of a catalyst and the in situ formation of the whiskers ensured tha t the whiskers were quite pure.