Contact damage and fracture micromechanism of multilayered TiN/CrN coatings at micro- and nano-length scales
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Data publicació2014
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Abstract
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.
CitacióRoa, J.J. [et al.]. Contact damage and fracture micromechanism of multilayered TiN/CrN coatings at micro- and nano-length scales. "Thin solid films", 2014, vol. 571, p. 308-315.
ISSN0040-6090
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S0040609014004222
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2014_ThinSolidFilms.pdf | Article | 2,323Mb | Accés restringit |