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|Title:||Investigation of the Nanostructure and Wear Properties of Physical Vapour Deposited CrCuN Nanocomposite Coatings|
|Authors:||BAKER M.a.; KENCH P.j.; TSOTSOS C; GIBSON PETER; LEYLAND A; MATTHEWS A|
|Citation:||JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS vol. 23 no. 3 p. 423-433|
|Publisher:||AMER INST PHYSICS|
|Type:||Articles in Journals|
|Abstract:||This article presents results on CrCuN nanocomposite coatings deposited by physical vapour deposition. The immiscibility of Cr containing a supersaturation of nitrogen and Cu offers the potential of depositing a predominantly metallic and therefore tough nanocomposite, composed of small CrN metallic and/or beta-Cr2N ceramic grains interdispersed in a minority Cu matrix. A range of CrCuN compositions have been deposited using a hot-filament enhanced unbalanced magnetron sputtering system. The stoichiometry and nanostructure have been studied by x-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy, and x-ray diffraction. Hardness, wear resistance, and impact resistance have been determined by nanoindentation, reciprocating-sliding, and ball-on-plate high-frequency impact. Evolution of the nanostructure as a function of composition and correlations of the nanostructure and mechanical properties of the CrCuN coatings are discussed. A nanostructure comprised of 1–3 nm alpha-CrN and beta-Cr2N grains separated by intergranular regions of Cu gives rise to a coating with significantly enhanced resistance to impact wear.|
|JRC Institute:||Institute for Health and Consumer Protection|
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