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Development of an experimental technique suitable for thermodynamic characterisation of oxides
RISE, Swerea, Swerea KIMAB.
RISE, Swerea, Swerea KIMAB.
2012 (English)Report (Refereed)
Abstract [en]

The formation of an oxide depends on the alloy composition, temperature of oxidation and oxidation environment defined by its oxygen partial pressure. In aggressive environments a dense oxide layer will be built up (upper figure). In less aggressive environments a matrix with individual oxides will form (lower figure). The type of oxide and its range of stability can be predicted by thermodynamic calculations. An experimental and computational technique has been developed, allowing for a thermodynamic evaluation of oxide stability. Oxidation of Fe-6Cr-3Mn-(0-0.1)Si alloys show mainly a spinel oxide on the formula (Fe,Mn)Cr2O4. Silicon is found in separate oxides, rather than combined Cr-Mn-Si oxides. At low partial pressures it appears to be quartz types of oxide SiO2, and at higher partial pressures it could be olivine (Fe,Mn)2SiO4.

Place, publisher, year, edition, pages
Swerea KIMAB AB , 2012. , p. 24
Series
Rapport / Institutet för metallforskning, ISSN 1403-848X ; KIMAB-2012-117
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13019OAI: oai:DiVA.org:ri-13019DiVA, id: diva2:973213
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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