Tribological and corrosion performance of the plasma-sprayed conformal ceramic coating on selective laser melted CoCrMo alloy
| Autor: | D.J. Lou, W.L. Xia, Hong Guo, F.L. Shen, H.Q. Li, X.Y. Fang |
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| Rok vydání: | 2021 |
| Předmět: |
Ceramics
Materials science Surface Properties Machinability Composite number Biomedical Engineering 02 engineering and technology Corrosion Biomaterials 03 medical and health sciences 0302 clinical medicine Materials Testing Alloys Ceramic Selective laser melting Composite material Thermal spraying Lasers 030206 dentistry Tribology 021001 nanoscience & nanotechnology Microstructure Mechanics of Materials visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 119 |
| ISSN: | 1878-0180 |
| Popis: | Ceramic implants have superior performance due to the excellent wear resistance and biocompatibility. However, the poor machinability limits their applications. Plasma sprayed ceramic coating on the additively manufactured metal substrate not only provides a 3-dimensional conformal implant coating and but also forms a highly wear-resistant surface layer. In this paper, three types of ceramic coatings of Al2O3, ZrO2, and Al2O3–ZrO2 composite have been fabricated by atmosphere plasma spray on the CoCrMo alloy substrate prepared by selective laser melting (SLM). It has been found that the Al2O3–ZrO2 composite coating has better corrosion and wear resistance compared with the ceramic coating (Al2O3, ZrO2) and the CoCrMo substrate. The adhesion strength between the Al2O3–ZrO2 composite coating and the substrate reaches 238 MPa. In addition, the wear and corrosion resistance increase with wear progression for all the fabricated ceramic coatings. The highly dense microstructure, fewer microcracks, and the amorphous phases are deterministic factors responsible for the superior tribological and corrosion performance of the Al2O3–ZrO2 composite coating. The fabrication route has been proved very promising to manufacture high-performance implants with ceramic coating. |
| Databáze: | OpenAIRE |
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