Journal of Materials Science

, Volume 46, Issue 19, pp 6273–6276 | Cite as

High temperature phase equilibrium of SiC-based ceramic systems: SiC–Si3N4–R2O3 (R = Gd, Y) systems

  • W. Z. Sun
  • Y. H. Chen
  • L. E. Wu
  • Y. J. Lu
  • Y. Jiang
  • Z. K. Huang
Abbaschian Festschrift


The phase relations of the ternary systems SiC–Si3N4–R2O3 (R = Gd and Y) have been investigated by XRD phase analyses of the hot-pressed samples from SiC, Si3N4, and R2O3 powders. Their subsolidus phase diagrams were presented. In situ SiO2 impurity in the powders always led to form some oxygen-richer rare-earth siliconoxynitrides and extend the ternary systems to the quaternary systems of SiC–Si3N4–SiO2–R2O3 (R = Gd, Y). Within these systems all rare-earth siliconoxynitrides coexist with SiC. The phase diagrams of the quaternary systems of SiC–Si3N4–SiO2–R2O3 (R = Gd, Y) were established, in which the subsolidus diagram of Si3N4–SiO2–Gd2O3 system was first reported.


Y2O3 Phase Relation Gd2O3 Quaternary System Sialon 
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Supported by National Natural Science Foundation of China, NSFC50962001.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • W. Z. Sun
    • 1
  • Y. H. Chen
    • 1
  • L. E. Wu
    • 1
  • Y. J. Lu
    • 1
  • Y. Jiang
    • 1
  • Z. K. Huang
    • 1
  1. 1.College of Materials Science and EngineeringBeifang Nationalities University of ChinaYinchuanChina

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