Densification of thoria through flash sintering

W. Straka; S. Amoah; J. Schwartz

doi:10.1557/mrc.2017.70

Densification of thoria through flash sintering

W. Straka, S. Amoah, J. Schwartz

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13 Scopus citations

Abstract

Thorium dioxide (thoria, ThO2) is used in refractory applications and as nuclear fuel. Its melting temperature, the highest of any binary oxide, makes it a difficult system to process. Here we report on the effects of flash sintering on the densification of thoria. We found 95% of theoretical density is obtained at ∼950 °C (∼30% of the melting temperature) with an electric field of 800 V/cm. Variation in power density had a minimal effect on the densification. Scanning electron microscopy images show the effects of flash sintering on grain size as a function of electric field.

Original language	English (US)
Pages (from-to)	677-682
Number of pages	6
Journal	MRS Communications
Volume	7
Issue number	3
DOIs	https://doi.org/10.1557/mrc.2017.70
State	Published - Sep 1 2017

All Science Journal Classification (ASJC) codes

General Materials Science

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10.1557/mrc.2017.70

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AB - Thorium dioxide (thoria, ThO2) is used in refractory applications and as nuclear fuel. Its melting temperature, the highest of any binary oxide, makes it a difficult system to process. Here we report on the effects of flash sintering on the densification of thoria. We found 95% of theoretical density is obtained at ∼950 °C (∼30% of the melting temperature) with an electric field of 800 V/cm. Variation in power density had a minimal effect on the densification. Scanning electron microscopy images show the effects of flash sintering on grain size as a function of electric field.

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Densification of thoria through flash sintering

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