TRIBOCORROSION PROPERTIES OF BORIDED AND Al2O3-COATED NiTi MATERIAL

The purpose of this study was to investigate the tribological properties of NiTi shape-memory alloy that was borided and coated with Al2O3 using the electrophoretic deposition (EPD) method. For the study, the sample surface was borided for 1 and 4 h at 800°C with the method of pack boriding, and the surface of the sample that was borided was coated with Al2O3 using the EPD method. The tribocorrosion properties of the untreated samples, borided samples, and borided and (duplex) Al2O3-coated samples were investigated and characterized using XRD and SEM devices. Accordingly, following the boriding treatment on the NiTi material, Al2O3 coating was successfully carried out with the EPD method. In comparison to the untreated samples, the tribocorrosion resistance of the surface-treated samples under a load of 3 N in a 3.5% NaCl solution increased. Additionally, among all samples, those that were subjected to the duplex surface treatment had the best tribocorrosion properties.

Keywords:

NiTi, Boriding, EPD Tribocorrosion,

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