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Silicon nitride foams from emulsions sintered by rapid intense thermal radiation
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
Rekke forfattare: 42015 (engelsk)Inngår i: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 35, nr 12, s. 3263-3272Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Open cell Si3N4 foams were fabricated by an emulsification process and subsequent sintering. Emulsification took place in an aqueous environment by using octane as alkane phase and a surfactant as stabilizer. Effects of different octane concentrations (50 vol% and 70 vol%) and stirring velocities (700 rpm and 1000 rpm) on porosity and pore size distribution were investigated. The shaped foams were pressureless sintered at 1600 degrees C inside a modified SPS set-up. Si3N4 foams decorated with SiC nanowires and with an average cell size of 8-41 mu m and total porosity of 80-86 vol% were obtained. The compressive strength ranged from 2.0 MPa up to 9.9 MPa. Both the foaming and sintering processes contributed to the development of different microstructures.

sted, utgiver, år, opplag, sider
2015. Vol. 35, nr 12, s. 3263-3272
Emneord [en]
Foams, Silicon nitride, Emulsification, Spark plasma sintering, Sintering by intense thermal radiation
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-119277DOI: 10.1016/j.jeurceramsoc.2015.02.007ISI: 000357356000009OAI: oai:DiVA.org:su-119277DiVA, id: diva2:844376
Tilgjengelig fra: 2015-08-05 Laget: 2015-08-03 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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