Phase state diagrams of a four-component system Al-Si-N-O-analysis of the thermodynamic stability of sialon compounds dased on energy crystal-chemistry

V. A. Vlasov, A. A. Klopotov, V. I. Vereshchagin, O. G. Volokitin, K. A. Bezukhov, N. P. Gorlenko, N. A. Tsvetkov

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The paper presents the results of the analysis of the state diagram of compounds in the system А12O3−SiO2. It has been found that the presence and the concentration of oxygen have a very important effect on formation of compounds with a crystalline structure in different syngony based on SIALON. Oxygen contributes to transition of the metastable AlXSi3XN4compound into stable one. The parameter of structural “friability” of compounds has been used in the analysis of the thermodynamic stability of compounds in the Al-Si-N-O system. It has been found that the SiAl4O2N4 compound with the 12H-SIALON structure (Pearson symbol hP32) has the greatest thermodynamic stability among the compounds under study in this system.

Original languageEnglish
Title of host publicationSolid State Phenomena
PublisherTrans Tech Publications Ltd
Pages97-103
Number of pages7
DOIs
Publication statusPublished - 2020

Publication series

NameSolid State Phenomena
Volume303
ISSN (Print)1012-0394
ISSN (Electronic)1662-9779

Keywords

  • Ceramics
  • Metastable compounds
  • SIALON
  • State diagram

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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