Abstract
A ceramic composite coating of Cr2O3 + TiC was developed on the surface of Al-6061 alloy plates. The HVOF coating process depends on the parameters such as substrate temperature, powder gas carrier flow rate, pressure, feed rate, standoff distance, and angle between the torch and substrate. The evaluation of surface hardness and microstructure ceramic composite coatings are discussed in this paper. Surface hardness was tested using the Nano-Indentation Tester. The microstructural characterization was conducted using Scanning Electron Microscope (SEM). The hardness test was conducted with a maximum load of 60 mN. The results indicated a vast improvement in the surface hardness of both the coated specimens. The tests performed indicated that Cr2O3 + 10%TiC coatings had a higher average hardness and modulus of elasticity measured at 4.33 GPa, and 108 GPa respectively. Whereas TiC + 10%Cr2O3 indicated a lower hardness and modulus of elasticity measured at 1.62 GPa and 79 GPa respectively. Thus, the tests showed that the Cr2O3 + 10%TiC coatings were harder. The microstructural characterization was conducted using the SEM for both cross sectional view and top view. The microstructural images indicated that the TiC + 10%Cr2O3 coated samples had a better surface finish, as compared to the Cr2O3 + 10%TiC coated samples.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
