IAM - Ceramic Materials and Technologies

Substitution of Y2O3 by a rare earth oxide mixture as sintering additive of Si3N4 ceramics

  • Author:

    Strecker, K.; Gonzaga, R.; Ribeiro, S.; Hoffmann, M. J.

  • Source:

    MATERIALS LETTERS 45 (2000), 1, 39–42 

     
  • Substitution of Y2O3 by a rare earth oxide mixture as sintering additive of Si3N4 ceramics.

Abstract

The objective of this work was to compare the sinterability, the microstructures and the mechanical properties of Si3N4 ceramics with additive mixtures based on yttrium oxide, Y2O3, and a mixed concentrate of yttrium and rare earth oxides. The RE2O3 samples were prepared by a two-step gas-pressure sintering process. No significant differences between the samples have been found, thus demonstrating the potential of this low cost alternative sinter additive.