Influence of deposition temperature on WTiN coatings tribological performance
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Fecha
2018Autor
Londoño-Menjura R.F.
Ospina R.
Escobar D.
Quintero J.H.
Olaya J.J.
Mello A.
Restrepo-Parra E.
Laboratorio de Física del Plasma, Universidad Nacional de Colombia Sede Manizales, Km. 9 vía al Magdalena, Manizales, Colombia
Universidad Industrial de Santander, Santander, Bucaramanga, Colombia
Centro Brasilero de Pesquizas Fisica – CBPF, Rio de Janeiro, Brazil
PCM computacional Applications, Universidad Nacional de Colombia Sede Manizales, Km. 9 vía al Magdalena, Manizales, Colombia
Grupo de Magnetismo y Simulación, Instituto de Física. Universidad de Antioquia, Medellín, Colombia
Materiales Nanoestructurados y Biomodelación, Universidad de Medellín, Medellín, Colombia
Grupo de investigación AFIS, Universidad Nacional de Colombia, Bogotá, Colombia
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WTiN films were grown on silicon and stainless-steel substrates using the DC magnetron sputtering technique. The substrate temperature was varied taking values of 100 °C, 200 °C, 300 °C, and 400 °C. X-ray diffraction analysis allowed us to identify a rock salt-type face centered cubic (FCC) structure, with a lattice parameter of approximately 4.2 nm, a relatively low microstrain (deformations at microscopy level, between 4.7% and 6.7%), and a crystallite size of a few nanometers (11.6 nm–31.5 nm). The C1s, N1s, O1s, Ti2p, W4s, W4p, W4d and W4f narrow spectra were obtained using X-ray photoelectron spectroscopy (XPS) and depending on the substrate temperature, the deconvoluted spectra presented different binding energies. Grain sizes and roughness (approximately 4 nm) of films were determined using atomic force microscopy. Scratch and pin on disc tests were conducted, showing better performance of the film grown at 200 °C. This sample exhibited a lower roughness, coefficient of friction, and wear rate. © 2017
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