Artículo
Rietveld analysis and mechanical properties of in situ formed La-β-Al2O3/Al2O3 composites prepared by sol-gel method
Autor/es | Rivero Antúnez, Pedro
Morales Flórez, Víctor Cumbrera Hernández, Francisco Luis Esquivias Fedriani, Luis María |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2022 |
Fecha de depósito | 2022-10-27 |
Publicado en |
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Resumen | In this work, the crystal evolution of α-Al2O3 composites reinforced with LBA platelets were monitored by XRD
Rietveld. In addition, the mechanical properties of totally densified specimens were researched by Vickers ... In this work, the crystal evolution of α-Al2O3 composites reinforced with LBA platelets were monitored by XRD Rietveld. In addition, the mechanical properties of totally densified specimens were researched by Vickers and Knoop indentations. These composite materials were prepared by a sol-gel process from alumina seeded boehmite sol and lanthanum nitrate. X-ray diffraction data have been studied by Rietveld refinements and line profile analyses, paying attention to the LBA formation, the evolution of vol%, and crystallite size of the different phases. It has been observed that the appearance of the LBA phase happens at a lower temperature than in samples prepared by a conventional solid state reaction. Indentation tests revealed that the presence of LBA microplatelets in the sol-gel samples leads to a significant increase of their indentation fracture resistance, in comparison to the conventional samples. |
Agencias financiadoras | European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía Ministerio de Ciencia e Innovación (MICIN). España |
Identificador del proyecto | PGC2018-094952-B-I00
P20-01121 PID2020-119327RJ-I00 |
Cita | Rivero Antúnez, P., Morales Flórez, V., Cumbrera Hernández, F.L. y Esquivias Fedriani, L.M. (2022). Rietveld analysis and mechanical properties of in situ formed La-β-Al2O3/Al2O3 composites prepared by sol-gel method. Ceramics International, 48 (17), 24462-24470. https://doi.org/10.1016/j.ceramint.2022.05.058. |
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