W-Cr-C-N Nanocomposite Thin-Film Coatings via Reactive Magnetron Sputtering
TypeCommunications avec actes
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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STANISHEVSKY, 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 ...
WALOCK, Michael J.; RAHIL, Issam; ZOU, Yujiao; IMHOFF, Luc; CATLEDGE, Shane Aaron; NOUVEAU, Corinne; STANISHEVSKY, Andrei (American Scientific Publishers, 2012)Many of today’s demanding applications require thin-film coatings with high hardness, toughness, and thermal stability. In many cases, coating thickness in the range 2–20 m and low surface roughness are required. Diamond ...
Thermal Stability and Mechanical Properties of Sputtered Chromium-Molybdenum-Nitride (CrMoN) Coatings ZOU, Yujiao; WALOCK, Michael J.; CATLEDGE, Shane Aaron; NOUVEAU, Corinne; STANISHEVSKY, Andrei (International OCSCO World Press, 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 ...
AISSANI, Linda; NOUVEAU, Corinne; WALOCK, Michael J.; DJEBAILI, Hamid; DJELLOUL, Ahmed Daoud (Maney, 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 ...
A study of the wear performance of duplex treated commercial low-alloy steel against alumina and WC balls BELIARDOUH, Nasser Eddine; NOUVEAU, Corinne; WALOCK, Michael J.; JACQUET, Philippe (elsevier, 2014)The objective of this work is to study the improvement of the tribological properties of low alloy steel using a duplex treatment of lowpressure carburizing and the deposition of a Cr–(WC–Co) coating by dual RF magnetron ...