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Pressureless sintering of beta silicon carbide nanoparticles

Malinge, Antoine ; Coupé, Aurélie ; Le Petitcorps, Yann ; Pailler, René

Journal of the European Ceramic Society, 2012-12, Vol.32 (16), p.4393-4400 [Periódico revisado por pares]

Elsevier Ltd

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  • Título:
    Pressureless sintering of beta silicon carbide nanoparticles
  • Autor: Malinge, Antoine ; Coupé, Aurélie ; Le Petitcorps, Yann ; Pailler, René
  • Assuntos: Binders ; Borides ; Density ; Loose powder sintering ; Microstructure ; Microstructure-final ; Nanostructure ; Platelets ; Pressureless sintering ; SiC ; Silicon carbide ; Sintering
  • É parte de: Journal of the European Ceramic Society, 2012-12, Vol.32 (16), p.4393-4400
  • Notas: ObjectType-Article-2
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  • Descrição: This study reports the pressureless sintering of cubic phase silicon carbide nanoparticles (β-SiC). Green blended compounds made of SiC nano-sized powder, a fugitive binder and a sintering agent (boron carbide, B4C), have been prepared. The binder is removed at low temperature (e.g. 800°C) and the pressureless sintering studied between 1900 and 2100°C. The nearly theoretical density (98% relative density) was obtained after 30min at 2100°C. The structural and microstructural evolutions during the heat treatment were characterised. The high temperatures needed for the sintering result in the β-SiC to α-SiC transformation which is revealed by the change of the composite microstructure. From 1900°C, dense samples are composed of β-SiC grains surrounding α-SiC platelets in a well-defined orientation. TEM investigations and calculation of the activation energy of the sintering provided insight to the densification mechanism.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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