%0 Journal Article
%T Synthesis of  in situ  reinforced silicon nitride composites
%A ALEKSANDRA VUCKOVIC
%A SNEZANA BOSKOVIC
%A LJILJANA ZIVKOVIC
%J Journal of the Serbian Chemical Society
%D 2004
%I Serbian Chemical Society
%X The objective of this work was to investigate the effect of two different sintering additives (CeO2 and Y2O3 + Al2O3), sintering time and amount of b-Si3N4 seeds on the densification, mechanical properties and microstructure of self-reinforced Si3N4 based composites obtained by pressureless sintering. Preparation of b-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 9.3 MPa m1/2 can be obtained using a presureless sintering procedure.
%K b-Si3N4 seeds
%K additive
%K pressureless sintering
%K self-reinforced composites
%K densification
%K fracture toughness
%U http://www.shd.org.yu/HtDocs/SHD/Vol69/No1/V69-No1-08.pdf