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Chemical reactions in the system Si3N4-SiO2-B2O3
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
Avdelningen för oorganisk kemi, Umeå universitet.
Luleå tekniska universitet.
1998 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 18, no 6, p. 633-640Article in journal (Refereed) Published
Abstract [en]

Chemical interactions in the system of silicon nitride with borosilicate glass have been studied as part of an evaluation of glass encapsulated HIP. Theoretical calculations have been performed to predict the thermodynamically stable phases under conditions reflecting different stages in a HIP-cycle. Experimental studies were made on heat treated mixtures of the silicon nitride and the silicate glass. These samples were evaluated with X-ray diffraction. At temperatures commonly used for densification, the system reacted to BN and Si2N2O in agreement with the theoretical calculations. At typical temperatures for pressure application no chemical reactions could be detected but the theoretical calculations showed that BN and, for larger amount of silicon nitride, also silicon oxynitride were stable. Minor amounts of the phases may have formed or non-equilibrium conditions could be explanations for the absence of the expected phases

Place, publisher, year, edition, pages
1998. Vol. 18, no 6, p. 633-640
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-7585DOI: 10.1016/S0955-2219(97)00188-XISI: 000074140200008Local ID: 5f8a9030-f4a1-11db-ac9f-000ea68e967bOAI: oai:DiVA.org:ltu-7585DiVA, id: diva2:980475
Note
Godkänd; 1998; 20070427 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Westman, Anna-Karin

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