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Microstructural refinement in spark plasma sintering 3Y-TZP nanoceramics
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 5
2016 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 36, no 10, 2565-2571 p.Article in journal (Refereed) Published
Abstract [en]

A commercial 3Y-TZP nanopowder was consolidated by spark plasma sintering (SPS) techniques. By special die-upset designs, each possible influence from the electric field, uniaxial pressure and heating rate was peeled to identify its contribution. Besides density and grain growth, the evolution of pore structure was consulted to clarify the relationships between microstructural development and densification kinetics. The results showed that neither electric current nor fast heating had no decisive contributions while external force was a necessity for the microstructural refinement. The authors proposed that the essentially underlying mechanism was the intensive particle rearrangement, which involves no grain growth but particle close-packing through grain rotation and sliding. The full advantages of this mechanism can be taken in rapid heating conditions, which combined with the application of higher pressures, make the SPS family of techniques to have advancement in the preparations of nanoceramics over their conventional counterparts characterized by slow heating features.

Place, publisher, year, edition, pages
2016. Vol. 36, no 10, 2565-2571 p.
Keyword [en]
Spark plasma sintering (SPS), Densification, Grain growth, Microstructural refinement, Particle rearrangement
National Category
Chemical Sciences Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-131182DOI: 10.1016/j.jeurceramsoc.2016.03.019ISI: 000375518700019OAI: oai:DiVA.org:su-131182DiVA: diva2:939870
Available from: 2016-06-20 Created: 2016-06-14 Last updated: 2016-06-20Bibliographically approved

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Shen, Zhijian
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Department of Materials and Environmental Chemistry (MMK)
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