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Controlling Co-capping in sintering of cermets
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Kontroll av ytkoboltbildning vid sintring av cermets (Swedish)
Abstract [en]

This master thesis includes a literature study and experimental work to understandthe conditions where a binder phase layer, Co-capping, could be produced orinhibited, for three different cermet grades in order to suggest changes in thesintering processes and two production units. The effect of C activity and sinteringatmosphere, e.g. flow rate, pressure were investigated. The results show that the Co-capping occurs on the cooling stage, when the binder phase, Co, solidifies. Co-capping could be inhibited by using a high C activity and high pressure (50 bar). Itwas further found that Co-capping could be evaporated using low pressure, i.e. vacuum, which has not been discussed in earlier studies on Co-capping. Evaporation was also found to have a relation with the solidification temperature of the grades,since grades with higher solidification temperature get Co-capping at a highertemperature, which consequently will be exposed to higher temperatures.

Place, publisher, year, edition, pages
2013. , 31 p.
UPTEC K, ISSN 1650-8297 ; 12009
Keyword [en]
Cermet, Co-capping, sintering
National Category
Other Chemical Engineering
URN: urn:nbn:se:uu:diva-197034OAI: oai:DiVA.org:uu-197034DiVA: diva2:611545
External cooperation
Sandvik AB
Subject / course
Educational program
Master Programme in Chemical Engineering
2013-01-17, Ångström 2003, Lägerhyddsvägen 1, Uppsala, 15:15 (Swedish)
Available from: 2014-01-07 Created: 2013-03-17 Last updated: 2014-01-07Bibliographically approved

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