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Making ceramics ductile at low homologous temperatures
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry, Inorganic Chemistry.
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2007 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 56, no 2, 89-91 p.Article in journal (Refereed) Published
Abstract [en]

Polycrystalline ceramics are brittle at room temperature but may deform by dislocation slip processes at higher temperatures, where T >= 0.5 T-M (T-M, the melting temperature), leading to strain hardening, i.e. the total strain to rupture is limited. We show that mutual sliding of nanometer grains and atomic transport along their boundaries enables low-temperature metal-like plasticity in nanocrystalline ceramics. Compression of fully dense MgO nanoceramics at temperatures as low as 700 degrees C (0.31 T-M) exhibited stress-strain curves with no strain hardening.

Place, publisher, year, edition, pages
2007. Vol. 56, no 2, 89-91 p.
Keyword [en]
low-temperature deformation, superplasticity, MgO, nanocrystalline materials, deformation, diffusion, kinetics
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-57530DOI: 10.1016/j.scriptamat.2006.09.024ISI: 000242513800003OAI: oai:DiVA.org:su-57530DiVA: diva2:416519
Note
authorCount :5Available from: 2011-05-12 Created: 2011-05-11 Last updated: 2017-12-11Bibliographically approved

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