| Autor: |
Alexandre Verchère, Sandrine Cottrino, Gilbert Fantozzi, Shashank Mishra, Thomas Gaudisson, Nicholas Blanchard, Stéphane Pailhès, Stéphane Daniele, Sylvie Le Floch |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Ceramics, Vol 3, Iss 4, Pp 507-520 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2571-6131 |
| DOI: |
10.3390/ceramics3040041 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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