Cost-effective fabrication of porous alpha-SiAlON bonded beta-SiAlON ceramics

authors	Xu, X; Fu, RL; Chen, KX; Ferreira, JMF
nationality	International
journal	MATERIALS LETTERS
author keywords	sialon; ceramics; microstructure; porosity
keywords	SILICON-NITRIDE CERAMICS; MICROSTRUCTURE; CRYSTALS; SI3N4
abstract	Porous sialon ceramics have been cost-effectively prepared by pressureless sintering from a mixture of elongated SHS beta-sialon powders with an alpha-sialon precursor composition composed Of alpha-Si3N4, AlN, Y2O3 and Al2O3. The obtained porous sialon ceramics exhibited low shrinkage and homogeneous pore size distribution. The results of X-ray diffraction and scanning electron microscopy showed that a uniform microstructure with elongated and intermingled beta-SiAlON grains, which were strongly connected by alpha-SiAlON phase, has been obtained. (c) 2005 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE BV
issn	0167-577X
year published	2005
volume	59
issue	19-20
beginning page	2601
ending page	2604
digital object identifier (doi)	10.1016/j.matlet.2005.03.048
web of science category	Materials Science, Multidisciplinary; Physics, Applied
subject category	Materials Science; Physics
unique article identifier	WOS:000230275100050