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Thermodynamic reassessment of the Si3N4-AlN-Al2O3-SiO2 system - Modeling of the SWON and liquid phases
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Computational Thermodynamics.ORCID iD: 0000-0002-8493-9802
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Computational Thermodynamics.ORCID iD: 0000-0001-5031-919X
2007 (English)In: Calphad, ISSN 0364-5916, E-ISSN 1873-2984, Vol. 31, no 2, p. 269-280Article in journal (Refereed) Published
Abstract [en]

The technically important quasi-ternary section Si3N4-AlN-Al2O3-SiO2 of the Si-Al-O-N system has been then-nodynamically reassessed. Improved descriptions for the Gibbs energies of the beta and O'-sialon phases are applied. Different modelings according to the different behaviors of the reciprocal system within the beta-sialon phase are discussed. The liquid phase is modeled with a new formula based on the ionic twosublattice model. The thermodynamic properties of the sialon phases are discussed and various phase diagrams are presented. The self-consistent thermodynamic dataset is useful for the computer simulation of sialon synthesis. Some examples of such applications are illustrated.

Place, publisher, year, edition, pages
2007. Vol. 31, no 2, p. 269-280
Keyword [en]
thermodynamic optimization, Si3N4-AlN-Al2O3-SiO2 system, SiAlON, ionic two-sublattice liquid model, computer simulation, o-n system, nitrogen ceramics, equilibria
Identifiers
URN: urn:nbn:se:kth:diva-16663DOI: 10.1016/j.calphad.2006.11.002ISI: 000246835500015Scopus ID: 2-s2.0-33947406262OAI: oai:DiVA.org:kth-16663DiVA, id: diva2:334706
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Mao, HuahaiSelleby, Malin

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