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Spark plasma sintered beta-phase silicon nitride with Sr and Ca as a sintering aid for load bearing medical applications
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Dept of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University.
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2012 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 32, no 11, 2705-2709 p.Article in journal (Refereed) Published
Abstract [en]

Due to its inherent good physical and chemical properties silicon nitride has high potential to be used for load bearing implants. However, the standard sintering additives alumina and rare earth oxides are limiting the biocompatibility of the material. The aim of the current project is to exchange the additives for more biologically beneficial additives. Spark plasma sintered silicon nitride was manufactured with strontium or calcium as sintering aids. The ability of forming high strength beta-phase microstructure silicon nitride was investigated. Powders were prepared with 10 and 30 wt.% glass phase and sintered at 1600, 1650, 1700 and 1750 degrees C. X-ray diffraction demonstrated compositions with 10 wt.% glass phase with strontium as sintering aid to yield larger amount of beta-phase. The highest amount of beta-phase (96% of the crystalline structure) was obtained using SPS for strontium-doped silicon nitride at sintering temperature 1750 degrees C, resulting in the highest fracture toughness, 4.2 MPa m(1/2).

Place, publisher, year, edition, pages
2012. Vol. 32, no 11, 2705-2709 p.
Keyword [en]
Spark plasma sintering, Si3N4, Strontium, Calcium, Biomedical applications
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Materials Science
Identifiers
URN: urn:nbn:se:uu:diva-179012DOI: 10.1016/j.jeurceramsoc.2011.12.027ISI: 000306247200018OAI: oai:DiVA.org:uu-179012DiVA: diva2:543237
Conference
ECerS XII, 12th Conference of the European Ceramic Society, 19-24 July 2011, Stockholm Sweden.
Available from: 2012-08-07 Created: 2012-08-06 Last updated: 2017-12-07Bibliographically approved

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Pettersson, MariaEngqvist, Håkan

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