Preparation of Y-SiAlON rod-like crystals and whiskers by combustion synthesis
authors Liu, GH; Chen, KX; Zhou, HP; Pereira, C; Quaresma, S; Ferreira, JMF
nationality International
journal MATERIALS LETTERS
author keywords SiAlON; rod-like crystal; whisker; combustion synthesis
keywords SILICON-NITRIDE; CERAMICS; GROWTH; MICROSTRUCTURE; MECHANISM
abstract By combustion synthesis, Y (alpha + beta)-SiAlON ceramic powders consisting of rod-like crystals were prepared. Effect of starting composition on the phase assemblage of combustion products was studied. It was found that with the increase of oxygen content, the phase assemblage of products varied from single-phase alpha-SiAlON to beta-SiAlON gradually. Novel beta-SiAlON whiskers were also observed in the combustion products. From the whisker morphology, it was suggested that both VLS and VS mechanisms operated here. It was also noticed that the whiskers could nucleate either on the basal face or on the side faces of as-existed prismatic rod-like crystals. (C) 2005 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0167-577X
year published 2005
volume 59
issue 29-30
beginning page 3955
ending page 3958
digital object identifier (doi) 10.1016/j.matlet.2005.07.046
web of science category Materials Science, Multidisciplinary; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000232864800036
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journal impact factor 3.204
5 year journal impact factor 2.785
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