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Effect of synthesis temperature and aging on the microstructure and hardness of Ti-Zr-C
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
2018 (English)In: International Journal of Refractory Metals and Hard Materials, ISSN 0263-4368, Vol. 73, p. 99-105Article in journal (Refereed) Published
Abstract [en]

The mixed carbide Ti-Zr-C has been synthesized through carbothermal reduction of TiZrO4 at 2200 °C, 2300 °C, and 2400 °C. As-synthesized carbide was subsequently aged at 1400 °C to study phase separation. Microstructural investigations and nano-indentation measurements were performed. It was found that the synthesis temperature was important for the homogeneity and porosity of the as-synthesized powder, which strongly influenced the subsequent phase separation upon aging. The phase separation occurred via discontinuous precipitation, and high-angle boundaries were preferred. Furthermore, the characteristics of discontinuous precipitation in the present Ti-Zr-C system with a miscibility gap were compared to those of classical discontinuous precipitation. Finally, fully decomposed particles were found to be slightly harder than the unaged carbide particles.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 73, p. 99-105
Keywords [en]
Discontinuous precipitation, Electron backscatter diffraction, Grain boundary misorientation, Powder metallurgy, Ternary carbide
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-227560DOI: 10.1016/j.ijrmhm.2018.02.001ISI: 000430028800014Scopus ID: 2-s2.0-85041405008OAI: oai:DiVA.org:kth-227560DiVA, id: diva2:1206523
Funder
VINNOVA, 2014-03392Swedish Foundation for Strategic Research , RMA 15-0062
Note

QC 20180517

Available from: 2018-05-17 Created: 2018-05-17 Last updated: 2018-05-17Bibliographically approved

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Ma, TaoranHedström, PeterOdqvist, Joakim

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