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Investigation of phase separation in the (TI, ZR)C system
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0003-1102-4342
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0003-3598-2465
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2012 (English)In: Advances in Powder Metallurgy and Particulate Materials - 2012, Proceedings of the 2012 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2012, 2012, 81-810 p.Conference paper, Published paper (Refereed)
Abstract [en]

The hardness of cemented carbide (WC-Co) cutting tools can be improved by the addition of TiC or ZrC to the matrix. It is possible that an even better hardness can be obtained by utilizing phase separation of a mixed (Ti, Zr)C where the mixed (Ti, Zr)C phase is stable at high temperature, but decomposes to TiC and ZrC at lower temperatures. In the present work, the decomposition is experimentally and theoretically investigated. The mixed carbide is first formed by synthesis from oxide powders at 2200°C and aging treatments are conducted at 1380 and 1450°C. X-ray diffraction analysis show that the synthesized mixed (Ti, Zr)C will decompose to TiC and ZrC. The experimental work is supplemented by thermodynamic and first-principles calculations.

Place, publisher, year, edition, pages
2012. 81-810 p.
Keyword [en]
Aging treatment, C-systems, Cemented carbides, First-principles calculation, High temperature, Lower temperatures, Oxide powder
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-144761Scopus ID: 2-s2.0-84890253778ISBN: 978-098533972-2 (print)OAI: oai:DiVA.org:kth-144761DiVA: diva2:716632
Conference
2012 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2012; Nashville, TN; United States; 10 June 2012 through 13 June 2012
Note

QC 20140512

Available from: 2014-05-12 Created: 2014-04-29 Last updated: 2014-05-12Bibliographically approved

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Odqvist, Joakim

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