2026-08-20T06:04:10Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/92122.22024-11-12T15:49:02Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Pecharromán, Carlos author Beltrán Fínez, Juan Ignacio author Esteban Betegón, Fátima author López-Esteban, Sonia author Bartolomé, José F. author Muñoz, María del Carmen author Moya, José S author 2005-05-17 Experimental tests for zirconia/nickel composites determined lower toughness than expected. In this regard, the combination of ab initio density functional theory calculations and high-resolution transmission electron microscopy observations allowed to describe the nature of the zirconia/nickel interface and to justify the absence of any toughening mechanism by grain bridging of the metal particles. In the particular case of nanocomposites, enhanced values of hardness were found. Hardness increases have been justified by a novel model which takes into account the Hall-Petch effect and mean particle size according to the percolation theory. It has been found that this model is not exclusive to zirconia/nickel but can be extended to several other superhard composites. 0044-3093 10.3139/146.018128 https://hdl.handle.net/20.500.14352/92122.2 Zirconia/nickel interfaces in micro- and nanocomposites