Artículo
A first insight into the microstructure and crack propagation in novel boron nitride nanosheet/3YTZP composites
Autor/es | Muñoz Ferreiro, Carmen
Morales Rodríguez, Ana Gallardo López, Ángela María Poyato Galán, Rosalía |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2021 |
Fecha de depósito | 2020-05-12 |
Publicado en |
|
Resumen | In this work, novel 3mol% yttria tetragonal zirconia polycristalline (3YTZP) ceramic composites with boron nitride nanosheets (BNNS) are investigated for the first time. Highly densified composites with 1 and 4vol% BNNS ... In this work, novel 3mol% yttria tetragonal zirconia polycristalline (3YTZP) ceramic composites with boron nitride nanosheets (BNNS) are investigated for the first time. Highly densified composites with 1 and 4vol% BNNS were obtained by spark plasma sintering (SPS) after BNNS synthesis using a solution exfoliation method and BNNS dispersion into the ceramic powder by ultrasonication. The BNNS presented homogeneous distribution throughout the ceramic matrix and preferential alignment in the plane perpendicular to the pressing axis during SPS. The BNNS incorporation had practically no effect on the Vickers hardness of the material nor on the Young's modulus. Anisotropy in crack development was found in the composite with 4%vol BNNS, together with a mechanism of extensive microcracking. Several energy-absorbing mechanisms during crack propagation, such as crack deflection, crack bridging, crack branching, BNNS pull-out and BNNS debonding, were identified in the composites by a close observation of the indentation-induced fracture paths. |
Identificador del proyecto | PGC-2018-101377-B-100 |
Cita | Muñoz Ferreiro, C., Morales Rodríguez, A., Gallardo López, A.M. y Poyato Galán, R. (2021). A first insight into the microstructure and crack propagation in novel boron nitride nanosheet/3YTZP composites. Boletín de la Sociedad Española de Cerámica y Vidrio, 60 (2), 128-136. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
A first insight into the micro ... | 5.419Mb | [PDF] | Ver/ | |