Stability of Si3N4 and Liquid Phase(s) During Sintering
- 1 July 1981
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 64 (7), C‐96-C‐97
- https://doi.org/10.1111/j.1151-2916.1981.tb09885.x
Abstract
Advanced sintering techniques for consolidation of Si3N4 powders in the presence of an oxygen‐rich liquid phase(s) require high temperatures and usually high nitrogen pressures. A stability diagram is constructed for Si3N4 as a function of the partial pressures of nitrogen (PN2) and silicon (PSi). High PN2 (20 to 100 atm) increases the stability of Si3N4 and the oxygen‐rich liquid phase by reducing the PSi and PSi0, respectively. The region of high sinterability is outlined for submicrometer Si3N4 powders containing 7 wt% BeSiN2 and 7 wt% SiO2 as densification aids.This publication has 7 references indexed in Scilit:
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