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Densification and preservation of ceramic nanocrystalline character by spark plasma sintering
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
2012 (engelsk)Inngår i: Advances in Applied Ceramics: Structural, Functional and Bioceramics, ISSN 1743-6753, E-ISSN 1743-6761, Vol. 111, nr 5-6, s. 280-285Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Spark plasma sintering is a hot pressing technique where rapid heating by dc electric pulses is used simultaneously with applied pressure. Thus, spark plasma sintering is highly suitable for rapid densification of ceramic nanoparticles and preservation of the final nanostructure. A considerable portion of the shrinkage during densification of the green compact of nanoparticles in the first and intermediate stages of sintering occurs during heating by particle rearrangement by sliding and rotation. Further densification to the final stage of sintering takes place by either plastic yield or diffusional processes. Full densification in the final stage of sintering is associated with diffusional processes only. Nanoparticle sliding and rotation during heating may also lead to grain coalescence, with much faster kinetics than normal grain growth at higher temperatures. Based on existing models for particle rearrangement and sliding, the contributions of these processes in conjunction with nanoparticle properties and process parameters were highlighted.

sted, utgiver, år, opplag, sider
2012. Vol. 111, nr 5-6, s. 280-285
Emneord [en]
Spark plasma sintering, Densification, Nanoparticles, Particle sliding, Plastic yield, Grain growth, Ceramics, Oxides
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-80621DOI: 10.1179/1743676111Y.0000000074ISI: 000306691700007OAI: oai:DiVA.org:su-80621DiVA, id: diva2:556502
Merknad

AuthorCount:4;

Tilgjengelig fra: 2012-09-25 Laget: 2012-09-25 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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