Thermodynamic reassessment of the Si3N4-AlN-Al2O3-SiO2 system - Modeling of the SWON and liquid phases
2007 (English)In: Calphad, ISSN 0364-5916, E-ISSN 1873-2984, Vol. 31, no 2, 269-280 p.Article in journal (Refereed) Published
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, 269-280 p.
thermodynamic optimization, Si3N4-AlN-Al2O3-SiO2 system, SiAlON, ionic two-sublattice liquid model, computer simulation, o-n system, nitrogen ceramics, equilibria
IdentifiersURN: urn:nbn:se:kth:diva-16663DOI: 10.1016/j.calphad.2006.11.002ISI: 000246835500015ScopusID: 2-s2.0-33947406262OAI: oai:DiVA.org:kth-16663DiVA: diva2:334706
QC 201005252010-08-052010-08-05Bibliographically approved