Characterization of a duplex coating (boriding + sputter-deposited AlCrON) synthesized on an ASTM F-75 cobalt alloy
| Autor: | C.A. Cuao-Moreu, M. Alvarez-Vera, E. Garcia-Sanchez, M.A.L. Hernandez-Rodriguez, A. Juarez-Hernandez, Demófilo Maldonado-Cortés |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Alloy technology industry and agriculture Metals and Alloys Energy-dispersive X-ray spectroscopy 02 engineering and technology Surfaces and Interfaces engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Coating Physical vapor deposition 0103 physical sciences Materials Chemistry engineering Surface modification Composite material 0210 nano-technology Boriding Tribometer |
| Zdroj: | Thin Solid Films. 712:138318 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2020.138318 |
| Popis: | Metallic biomaterials have been widely used due to their excellent mechanical properties. Cobalt-chromium-molybdenum alloys, in particular are among the safest for the fabrication of orthopedic prostheses. Nevertheless, the liberation of metallic ions as a result of wear has become a problem due to adverse biological reactions. Thus, surface modification through thermochemical treatments and ceramic coatings may be used to improve the tribological properties of the alloy. In this work, a duplex coating obtained from a boriding thermochemical treatment plus an aluminum-chromium oxynitride coating created by physical vapor deposition was synthesized on an ASTM F-75 cobalt alloy. This surface condition was compared with a borided and an untreated ASTM F-75 cobalt alloy. Surfaces were characterized using scanning electron microscopy (SEM) with energy dispersive spectroscopy, X-ray diffraction, and nanoindentation test. The tribological response was studied by means of a ball-on-disc tribometer under dry-sliding conditions tracking the coefficient of friction, volume loss, wear rate, and surface damage by stereoscopy, profilometry, optical 3D measurements, and SEM. Duplex coating increased the wear resistance 7 times relative to the wear resistance of the untreated sample, and 1.5 times relative to the borided sample. |
| Databáze: | OpenAIRE |
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