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Densification mechanism involved during spark plasma sintering of a codoped α-alumina material: Part I. Formal sintering analysis

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Abstract

Spark plasma sintering (SPS) of a codoped α-alumina powder has been investigated at temperatures between 850 and 1200 °C. The “grain size versus relative density” trajectory showed a significant grain growth as soon as the residual porosity closed. The densification mechanism was determined by anisothermal (investigation of the heating part of a SPS run) and isothermal methods. It was proposed that grain-boundary sliding, accommodated by oxygen grain-boundary diffusion, governed densification.

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  1. Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain, Saint-Gobain C.R.E.E., 84306, Cavaillon Cedex, France

    G. Bernard-Granger & C. Guizard

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  1. G. Bernard-Granger
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  2. C. Guizard
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Correspondence to G. Bernard-Granger.

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Bernard-Granger, G., Guizard, C. Densification mechanism involved during spark plasma sintering of a codoped α-alumina material: Part I. Formal sintering analysis. Journal of Materials Research 24, 179–186 (2009). https://doi.org/10.1557/JMR.2009.0025

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