| METALS AND METAL MATRIX COMPOSITES |
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| Microstructure and Properties of Zr-based Amorphous Coatings Deposited by Micro-arc Spark Deposition |
| WANG Ting1, HU Bin1,*, WANG Wenqin2, WANG Feifan3
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1 China Special Equipment Inspection and Research Institute, Beijing 100029, China
2 School of Advanced Manufacturing, Nanchang University, Nanchang 330031, China
3 Beijing lnstitute of Astronautical Systems Engineering, Beijing 100076, China |
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Abstract Ti6Al4V alloy has good corrosion resistance and biocompatibility, and has been widely used as bone replacement materials. However, Ti6Al4V has poor wear resistance. Zr-based amorphous alloy coating has the advantages of high strength, high wear resistance, high corrosion resistance and good biocompatibility, which makes it have great application prospects in the field of biomedical materials. The Zr-based amorphous coating was prepared on the surface of TC4 by micro-arc spark deposition technology, and the micro-structure and micro-hardness of the coating were studied. Furthermore, wear behavior of the coating under different friction time were also investigated. The results show that the coatings mainly compose of Cu8Zr3, ZrO2, and amorphous phases. The coating thickness is about (150±10) μm and has good bonding with the substrate. The hardness value of the amorphous coating can reach up to 1 252HV0.1, which is about 3 times that of the substrate. Under different friction time, the coating exhibits a smaller wear coefficient than the substrate. When the friction time is 30 min, the wear resistance of the coating is 4.8 times that of the substrate. The wear mechanism of the substrate TC4 is abrasive wear, while the coating is fatigue wear. This work provides a theoretical basis for further improving the wear resistance of Ti6Al4V and the application of Zr-based amorphous alloy coating.
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Published: 25 August 2024
Online: 2024-09-10
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| Fund:Grants from Internal Research Project of China Special Equipment Inspection and Research Institute (2021QingNian09). |
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2024, Vol. 38 
