Title:
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Contact damage and fracture micromechanism of multilayered TiN/CrN coatings at micro- and nano-length scales
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Author:
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Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Martínez, R; Ramírez Sandoval, Giselle; Tarragó, Josep Maria; Rodríguez, R; Llanes Pitarch, Luis Miguel
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
Abstract:
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In this study, systematic nanomechanical andmicromechanical studies have been conducted in threemultilayer
TiN/CrN systems with different bilayer periods (8, 19 and 25 nm). Additionally, experimental work has been performed
on corresponding TiN and CrN single layers, for comparison purposes. The investigation includes the use
of different indenter tip geometries aswell as contact loading conditions (i.e. indentation/scratch) such to induce
different stress field and damage scenarioswithin the films. The surface and subsurface damage under the different
indentation imprints and scratch tracks have been observed by atomic forcemicroscopy, field emission scanning
electron microscopy and focused ion beam. Multilayer TiN/CrN coated systems are found to exhibit higher
adhesion strength (under sliding contact load) and cracking resistance (under spherical indentation) than those
coated with reference TiN and CrN monolayers. The main reason behind these findings is the effective development
of microstructurally-driven deformation and cracking resistant micromechanisms: rotation of columnar
grains (and associated distortion of bilayer period) and crack deflection of interlayer thickness length scale,
respectively. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Alloys -Multilayered TiN/CrN coatings
Contact damage
Adhesion strength
Cracking resistance -Aliatges |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
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