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Fabrication of crack-free SUS316L/Al(2)O(3) functionally graded materials by spark plasma sintering
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2011 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 46, no 17, 5807-5814 p.Article in journal (Refereed) Published
Abstract [en]

This paper describes the preparation of crack-free stainless steel 316L/alumina functionally graded material (SUS316L/Al(2)O(3) FGM) by spark plasma sintering (SPS). The sintering of individual powders and their composites was first studied to find an optimum SPS condition to get both materials and their mixtures highly dense. Sintering of cylindrical-shaped FGM pellets (I center dot 20 mm) with various numbers of interlayers of 1, 2, 3, 4, and 9 was then carried out where the kind of and location of related cracking were carefully examined. The FGMs faced the problem of cracking mainly in the radial direction near the Al(2)O(3)-rich layers regardless of the number of layers or the gradient compositional profile. An yttrium-stabilized zirconia (3Y-ZrO(2)) was added thereafter to the gradient on the expense of Al(2)O(3) content (up to 50 vol.%) and no radial cracking was found. Defects-free FGM pellets were successfully produced by interposing 19 interlayers between the SUS316L and Al(2)O(3) ends. The Vickers hardness profile was determined throughout the cross-section of sintered FGM and it was varying steadily through the gradient from 2.0 GPa at the SUS316L surface to 14.4 GPa at the Al(2)O(3) surface.

Place, publisher, year, edition, pages
2011. Vol. 46, no 17, 5807-5814 p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-68027DOI: 10.1007/s10853-011-5536-2ISI: 000291359700026OAI: oai:DiVA.org:su-68027DiVA: diva2:471854
Note
authorCount :4Available from: 2012-01-03 Created: 2012-01-02 Last updated: 2017-12-08Bibliographically approved

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