Artículo
The role of carbon nanotubes on the stability of tetragonal zirconia polycrystals
Autor/es | Morales Rodríguez, Ana
Poyato Galán, Rosalía Gutiérrez Mora, Felipe Muñoz Bernabé, Antonio Gallardo López, Ángela María |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2018-10 |
Fecha de depósito | 2023-12-27 |
Publicado en |
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Resumen | The effect of single walled carbon nanotubes (SWNT) at zirconia grain boundaries on the stability of a tetragonal
zirconia polycrystalline matrix has been explored in as–sintered composites and after low–temperature ... The effect of single walled carbon nanotubes (SWNT) at zirconia grain boundaries on the stability of a tetragonal zirconia polycrystalline matrix has been explored in as–sintered composites and after low–temperature hydrothermal degradation (LTD) experiments. For this purpose, highly–dense 3 mol% Y2O3–doped tetragonal zirconia polycrystalline (3YTZP) ceramics and SWNT/3YTZP composites were prepared by spark plasma sintering (SPS). Quantitative X–ray diffraction analysis and microstructural observations point out that an increasing amount of well–dispersed SWNT bundles surrounding zirconia grains decreases the metastable tetragonal phase retention in the ceramic matrix after sintering. In contrast, the tetragonal ceramic grains in composites with SWNTs are less sensitive to the presence of water, i.e. to undergo a martensitic transformation under LTD conditions, than monolithic 3YTZP ceramics. The SWNT incorporation diminishes micro–cracking due to tetragonal to monoclinic ZrO2 phase transformation in the composites. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía |
Identificador del proyecto | MAT2015–67889–P
P12–FQM–1079 |
Cita | Morales Rodríguez, A., Poyato Galán, R., Gutiérrez Mora, F., Muñoz Bernabé, A. y Gallardo López, Á.M. (2018). The role of carbon nanotubes on the stability of tetragonal zirconia polycrystals. Ceramics International, 44 (15), 17716-17723. https://doi.org/10.1016/j.ceramint.2018.06.238. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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CERI-2018_b_accepted.pdf | 825.3Kb | [PDF] | Ver/ | Versión aceptada |