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Open AccessArticle

Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder

1
IRCELYON, Université Lyon1-CNRS, UMR 5256, 2 Avenue Albert Einstein, 69626 Villeurbanne, France
2
MATEIS, INSA-Université Lyon1-CNRS, UMR 5510, INSA de Lyon, 69621 Villeurbanne, France
3
Institut Lumière Matière, Université Lyon1-CNRS, UMR 5306, Université de Lyon, 69622 Villeurbanne, France
4
C2P2, Université Lyon 1-CPE Lyon-CNRS, UMR 5265, 43 Bvd du 11 Novembre 1918, 69616 Villeurbanne, France
*
Authors to whom correspondence should be addressed.
Received: 23 October 2020 / Revised: 13 November 2020 / Accepted: 17 November 2020 / Published: 4 December 2020
(This article belongs to the Special Issue Spark Plasma Sintering Technology)
Sintering under pressure by means of the spark plasma sintering (SPS) technique is a common route to reduce the sintering temperature and to achieve ceramics with a fine-grained microstructure. In this work, high-density bulk TiO2 was sintered by high pressure SPS. It is shown that by applying high pressure during the SPS process (76 to 400 MPa), densification and phase transition start at lower temperature and are accelerated. Thus, it is possible to dissociate the two densification steps (anatase then rutile) and the transition phase during the sintering cycle. Regardless of the applied pressure, grain growth occurs during the final stage of the sintering process. However, twinning of the grains induced by the phase transition is enhanced under high pressure resulting in a reduction in the crystallite size. View Full-Text
Keywords: nanopowder TiO2; high-pressure spark plasma sintering; grain growth; densification rate nanopowder TiO2; high-pressure spark plasma sintering; grain growth; densification rate
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MDPI and ACS Style

Verchère, A.; Cottrino, S.; Fantozzi, G.; Mishra, S.; Gaudisson, T.; Blanchard, N.; Pailhès, S.; Daniele, S.; Le Floch, S. Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder. Ceramics 2020, 3, 507-520. https://0-doi-org.brum.beds.ac.uk/10.3390/ceramics3040041

AMA Style

Verchère A, Cottrino S, Fantozzi G, Mishra S, Gaudisson T, Blanchard N, Pailhès S, Daniele S, Le Floch S. Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder. Ceramics. 2020; 3(4):507-520. https://0-doi-org.brum.beds.ac.uk/10.3390/ceramics3040041

Chicago/Turabian Style

Verchère, Alexandre; Cottrino, Sandrine; Fantozzi, Gilbert; Mishra, Shashank; Gaudisson, Thomas; Blanchard, Nicholas; Pailhès, Stéphane; Daniele, Stéphane; Le Floch, Sylvie. 2020. "Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder" Ceramics 3, no. 4: 507-520. https://0-doi-org.brum.beds.ac.uk/10.3390/ceramics3040041

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