Effects of technical parameters on the phase composition and microstructure of Yb alpha-sialon prepared by combustion synthesis

authors	Liu, GH; Chen, KX; Zhou, HP; Ning, XS; Ferreira, JMF
editors	Pan, W; Gong, JH; Ge, CC; Li, JF
nationality	International
journal	HIGH-PERFORMANCE CERAMICS III, PTS 1 AND 2
author keywords	Yb alpha-sialon; combustion synthesis; elongated grains
keywords	SILICON-NITRIDE; CERAMICS; CRYSTALS
abstract	In this paper, Yb alpha-sialon powders with elongated grains have been prepared by combustion synthesis. The effects of diluents, nitrogen pressure, adding alpha-sialon seeds and NH4F on the phase transformation and microstructure development of the samples are discussed systematically. The experimental results show that the addition of diluents, proper nitrogen pressure and additive NH4F can facilitate the nitridation of Si. It was also found that the added alpha-sialon seeds and NH4F are beneficial to the nucleation and growth of elongated grains.
publisher	TRANS TECH PUBLICATIONS LTD
issn	1013-9826
isbn	0-87849-959-8
year published	2005
volume	280-283
beginning page	1237
ending page	1240
web of science category	Materials Science, Ceramics; Materials Science, Composites
subject category	Materials Science
unique article identifier	WOS:000227051400299