Título
BN nanosheets reinforced zirconia composites: An in-depth microstructural and mechanical study.
Autor(es)
Palabras clave
Boron nitride nanosheets
Composite materials
InterfacesR-curve
Crack bridging
Fecha de publicación
2024-02
Citación
Muñoz-Ferreiro, C., Reveron, H., Rojas, T. C., Reyes, D. F., Cottrino, S., Moreno, P., Prada-Rodrigo, J., Morales-Rodríguez, A., Chevalier, J., Gallardo-López, Á., & Poyato, R. (2024). BN nanosheets reinforced zirconia composites: An in-depth microstructural and mechanical study. Journal of the European Ceramic Society. https://doi.org/10.1016/j.jeurceramsoc.2024.02.002
Resumen
[EN]This paper deals with the effect of hydroxylated boron nitride nanosheets (BNNS) incorporation on the microstructural and mechanical features of zirconia ceramics. Few-layered BNNS were synthesized via a simple hydroxide-assisted planetary ball milling exfoliation technique. 3 mol% yttria tetragonal zirconia polycrystal (3Y-TZP) with 2.5 vol% BNNS powders were prepared by an environmentally friendly process in water, and spark-plasma sintered at three temperatures to explore the in-situ reduction of the functionalized BNNS. An exhaustive study by (S)TEM techniques was performed to elucidate the influence of the sintering temperature on the matrix and the 3Y-TZP/BNNS interfaces, revealing that BNNS were homogeneously distributed throughout the matrix with an abrupt transition at 3Y-TZP/BNNS interfaces. BNNS effectively hindered slow crack growth, thus increasing the composite’s crack growth resistance by about 30 %. A 1 MPa·m1/2 rising R-curve was also induced by crack bridging.
URI
ISSN
0955-2219
DOI
10.1016/j.jeurceramsoc.2024.02.002
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