Evaluation of Microstructure and Wear Behavior of Iron-Titanium Composition Coating Applied by HVOF Process

Jalali, Amireh; Raoufi, Mehdi; Nematzadeh, Fardin

doi:10.30501/jamt.2021.222880.1078

Document Type : Original Reaearch Article

Authors

Department of Materials Engineering, Faculty of Engineering, University of Arak, Arak, Markazi, Iran

https://doi.org/10.30501/jamt.2021.222880.1078

Abstract

The purpose of this investigation is to find a new coating method to reduce economic costs, meet the needs of the marine industry to high-strength ship propellers and increase the lifetime of these pieces during the operation in seawater. For this purpose, milled TM mineral powder (containing a combination of iron and titanium) was coated on the surface of a Nibral alloy substrate by high-speed oxygen fuel (HVOF) thermal spraying process. The coating properties were evaluated using X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), microhardness, and roughness analysis. Also, the tribological behaviour of the substrate and the coating was evaluated using the pin on disk wear test under a 10 N load and a distance of 1000 m at ambient temperature. The results of powder characterization indicate the suitable particle size distribution and the presence of phases containing iron and titanium elements in the powder. Accordingly, the crystallinity and phase stability of the powder in the coating were enhanced by the presence of CuFe₂O₄, Fe₃O₄, and Fe_2.6O₄Ti_0.52 phases. The results showed that the high velocity of throwing particles during spraying and the density of the coating structure caused the increase of the coating adhesion to the substrate, the decrease of porosity and the increase of hardness of the coating. This coating, with a lower wear rate than the substrate, significantly increased the wear resistance of the specimen.

Keywords

Main Subjects

Coatings

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Journal of Advanced Materials and Technologies

Evaluation of Microstructure and Wear Behavior of Iron-Titanium Composition Coating Applied by HVOF Process

References

References

Volume 9, Issue 4
February 2021
Pages 13-21

Evaluation of Microstructure and Wear Behavior of Iron-Titanium Composition Coating Applied by HVOF Process

References

References

Volume 9, Issue 4February 2021Pages 13-21

Volume 9, Issue 4
February 2021
Pages 13-21