W-Cr-C-N Nanocomposite Thin-Film Coatings via Reactive Magnetron Sputtering
Communication avec acte
While binary tungsten carbide can form smooth, hard films, these suffer from low fracture toughness. Tungsten nitride films are frequently harder, but are more brittle. Chromium nitride has excellent wear and oxidation resistance, but films often form with low hardness. Composites of these binary compounds offer a possibility to tailor the material for a desired combination of properties. To this end, we have used reactive RF-magnetron sputtering with Cr and WC targets to form quaternary composites, with nitrogen as the reactive gas. The coatings were deposited on Si, Ti, and steel substrates. The nitrogen partial pressure was varied to investigate the relationship between the film properties and the deposition conditions. Energy dispersive spectroscopy showed changes in the chemical composition as a result of the change in nitrogen partial pressure. X-ray diffraction illuminated the structure as either a solid solution with a B1 NaCl structure, or a nanocomposite with the average crystallite size under 11 nm. Optical interferometer revealed low compressive stresses. And nanoindentation established that the films are hard and adherent.
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Chapitre d'ouvrage scientifiqueSTANISHEVSKY, Andrei; WALOCK, Michael J.; ZOU, Yujiao; IMHOFF, Luc; ZAIRI, Amel; NOUVEAU, Corinne (Elsevier, 2012)Tungsten carbide-based coatings have been used in a wide variety of industrial applications such as high speed cutting tools, extrusion dies, drills, aerospace industries, and more. A few reports on ternary and quaternary ...
Thermal Stability and Mechanical Properties of Sputtered Chromium-Molybdenum-Nitride (CrMoN) Coatings Article dans une revue avec comité de lectureZOU, Yujiao; WALOCK, Michael J.; CATLEDGE, Shane Aaron; NOUVEAU, Corinne; STANISHEVSKY, Andrei (2009)Purpose: The purpose of paper is to determinate thermal stability and mechanical properties of sputtered chromium-molybdenum-nitride (CrMoN) coatings. Design/methodology/approach: We have deposited 1.8 m-thick ternary ...
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Tribological and electrochemical performances of Cr/CrN and Cr/CrN/CrAlN multilayer coatings deposited by RF magnetron sputtering Article dans une revue avec comité de lectureBELIARDOUH, Nasser Eddine; BOUZID, Kheireddine; NOUVEAU, Corinne; TLILI, Brahim; WALOCK, Michael J. (Elsevier, 2015)CrN/CrAlN and Cr/CrN/CrAlN multilayers were grown with dual RF magnetron sputtering. The application of these multilayers will be wood machining of green wood. That is why ball-on-disc and electrochemical tests in NaCl ...
Article dans une revue avec comité de lectureAISSANI, Linda; NOUVEAU, Corinne; WALOCK, Michael J.; DJEBAILI, Hamid; DJELLOUL, Ahmed Daoud (Maney Publishing, 2015)This work aims to show the characterisation of Cr–V–N coatings, with the varied amounts of Cr and V. CrN, VN and Cr–V–N coatings were deposited onto silicon and XC100 steel substrates by reactive radio frequency magnetron ...