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Preparation and firing of a TiC/Si powder mixture
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-3661-9262
Linköpings universitet.ORCID iD: 0000-0002-2286-5588
2009 (English)In: 5th International EEIGM/AMASE/FORGEMAT Conference on Advanced Materials Research, Bristol: IOP Publishing Ltd , 2009Conference paper, Published paper (Refereed)
Abstract [en]

This paper describes how the preparation and heat treatment of TiC/Si powders influences the phase reactions during firing. The powders are prepared by milling and some effects of powder preparation are discussed. A solid state displacement reaction according to: 3TiC + 2Si → Ti3SiC2 + SiC is a priori expected to take place during heat treatment. The firing procedure is investigated with respect to the effect of heat treatment time and temperature on the phases produced, especially Ti3SiC2. Samples were heat treated in a graphite lined furnace. Heat treated samples are analysed by x-ray diffraction, scanning electron microscope and energy dispersive spectroscopy. Ti3SiC2, TiC and SiC are dominant in the final products. The highest amount of Ti3SiC2 is achieved for short holding times (2-4 hours) at high temperatures (1350-1400°C). Ti3SiC2 appears to decompose at elevated temperatures or extended times, through a Ti3SiC2 → TiC + Si(g) type reaction. The activation energy of Ti3SiC2 phase formation is determined to be 289 kJ/mol, using the Mehl-Avrami-Johnson model.

Place, publisher, year, edition, pages
Bristol: IOP Publishing Ltd , 2009.
Series
I O P Conference Series: Materials Science and Engineering, ISSN 1757-8981 ; 5
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-32922DOI: 10.1088/1757-899X/5/1/012016Local ID: 794188f0-a2b2-11de-8293-000ea68e967bOAI: oai:DiVA.org:ltu-32922DiVA: diva2:1006156
Conference
EEIGM/AMASE/FORGEMAT conference on Advanced Materials Research : 04/11/2009 - 05/11/2009
Note
Validerad; 2009; 20090916 (idaker)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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