Tribological behavior of borided surface on CoCrMo cast alloy
| Autor: | C.A. Cuao-Moreu, M. Alvarez-Vera, E. Hernández-Sánchez, E. Garcia-Sanchez, A. Perez-Unzueta, M.A.L. Hernandez-Rodriguez |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Alloy 02 engineering and technology Surfaces and Interfaces engineering.material Tribology 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Corrosion chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Coating Mechanics of Materials Boride Materials Chemistry Surface roughness engineering Surface modification Composite material 0210 nano-technology Tribometer |
| Zdroj: | Wear. :204-211 |
| ISSN: | 0043-1648 |
| DOI: | 10.1016/j.wear.2019.02.006 |
| Popis: | CoCrMo alloys are used in a wide range of applications because of their acceptable fatigue strength and corrosion resistance. However, CoCrMo-based components exhibit a deleterious effect of wear. For this reason, surface modification through ceramic coatings has become in a useful alternative to improve mechanical resistance. The main aim of the present study was to investigate the tribological behavior of a system of diffusional boride layers formed on the substrate of CoCrMo alloy. For this purpose, different boron diffusion heat treatment parameters were performed: 1223, 1248 and 1273 K by 6, 8 and 10 h, respectively. Surfaces were characterized using scanning electron microscopy (SEM), surface roughness measurement, micro-hardness testing, and X-ray diffraction. The tribological response was studied by means of ball on disc tribometer under dry-sliding conditions tracking their friction coefficient, mass loss, wear rate and surface damage by stereoscopy and SEM. Boride coating at 1223 K by 6 h showed the better wear resistance, increased it 6 times relative to the wear resistance obtained for the CoCr alloy untreated sample. |
| Databáze: | OpenAIRE |
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