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Combustion synthesis of (Mo 1- xCrx) Si 2 (x= 0.00--0.30) alloys in SHS mode
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
Department of Materials and Environmental Chemistry, Stockholm University.ORCID iD: 0000-0003-4888-6237
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
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2012 (English)In: Advanced Powder Technology, ISSN 0921-8831, E-ISSN 1568-5527, Vol. 23, no 2, p. 133-138Article in journal (Refereed) Published
Abstract [en]

Combustion synthesis was adopted to successfully synthesize molybdenum–silicon–chromium (Mo−Si−Cr) alloys by the mode of self-propagating high-temperature synthesis (SHS). The experimental study of combustion synthesis of Mo−Si−Cr alloys was conducted on elemental powder compacts. Powder compacts with nominal compositions including MoSi2, (Mo0.95Cr0.05)Si2, (Mo0.90Cr0.10)Si2, (Mo0.85Cr0.15)Si2, (Mo0.80Cr0.20)Si2, (Mo0.75Cr0.25)Si2 and (Mo0.70Cr0.30)Si2 were employed in combustion synthesis experiments. The combustion mode, combustion temperature, flame-front propagation velocity and product structure were investigated. The results showed that Mo−Si−Cr alloys were synthesized by an unsteady state combustion mode with a spiral-trajectory reaction front. The peak combustion temperature reduced with the addition of Cr to Mo–Si system. The flame-front propagation velocity decreased with an increase in Cr content of the powder compact. The X-ray diffraction (XRD) results showed that the crystal structure of the combustion product changed from Cllb-type structure (Mo0.90Cr0.10)Si2 to C40-type structure (Mo0.85Cr0.15)Si2 with increase in Cr content of Mo–Cr–Si alloys. The intensities of diffraction peaks of the C40-type phase gradually increased with increase in Cr content.

Place, publisher, year, edition, pages
2012. Vol. 23, no 2, p. 133-138
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-5406DOI: 10.1016/j.apt.2011.01.003Local ID: 38124c4d-001e-4c23-9362-aada5099708eOAI: oai:DiVA.org:ltu-5406DiVA: diva2:978280
Note
Upprättat; 2012; 20150416 (farakh)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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