Spectroscopic evaluation of nanocomposite formation from amorphous complexcompound in Si3N4-BN system

Authors
Hojo, J Eto, K Uehara, M Enomoto, N
Citation
J. Hojo et al., Spectroscopic evaluation of nanocomposite formation from amorphous complexcompound in Si3N4-BN system, SCR MATER, 44(8-9), 2001, pp. 2169-2172
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
SCRIPTA MATERIALIA
ISSN journal
13596462 → ACNP
Volume
44
Issue
8-9
Year of publication
2001
Pages
2169 - 2172
Database
ISI
SICI code
1359-6462(20010518)44:8-9<2169:SEONFF>2.0.ZU;2-R
Abstract
The phase separation behavior of amorphous Si3N4-BN composite powder was in vestigated by spectroscopic methods. The powder was heat-treated in N-2 at 1200-1600 degreesC with and without Y2O3-Al2O3 sintering aid. The IR analys is indicated that Si3N4 and BN were separated above 1400 degreesC and the c rystallization was accelerated by the sintering aid. It was found from the XPS analysis that BN was expelled from the inside to the surface of composi te particles during heating. Finally; The dense nanocomposite of Si3N4-BN s ystem was obtained by hot pressing at 1800 degreesC. (C) 2001 Acta Material ia Inc. Published by Elsevier Science Ltd. All rights reserved.