Synthesis of "in situ" reinforced silicon nitride composites

The objective of this work was to investigate the effect of two different sintering additives (CeO2 and Y2O3 + Al2O3), sintering time and amount of β-Si3N4 seeds on the densification, mechanical properties and microstructure of self-reinforced Si3N4 based composites obtained by pressureless sinterin...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of the Serbian Chemical Society Vol. 69; no. 1; pp. 59 - 67
Main Authors:	Vučković Aleksandra B., Bošković Snežana B., Živković Ljiljana M.
Format:	Journal Article
Language:	English
Published:	Serbian Chemical Society 01-01-2004
Subjects:	additive densification fracture toughness pressureless sintering self-reinforced composites β-si3n4 seeds
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The objective of this work was to investigate the effect of two different sintering additives (CeO2 and Y2O3 + Al2O3), sintering time and amount of β-Si3N4 seeds on the densification, mechanical properties and microstructure of self-reinforced Si3N4 based composites obtained by pressureless sintering. Preparation of β-Si3N4 seeds, also obtained by a pressureless sintering procedure, is described. Samples without seeds were prepared for comparison. The results imply that self-reinforced silicon nitride based composites with densities close to the theoretical values and with fracture toughness of 9.3MPa m1/2 can be obtained using a presureless sintering procedure.
ISSN:	0352-5139 1820-7421
DOI:	10.2298/JSC0401059V