Abstract
The current investigation observes the outcome of enhancing the surface properties by AlCrN monolayer coating using the cathodic arc plasma method on the Fe–Cu–C–Mo alloys. The compacts were sintered in spark plasma sintering (SPS) with the heat transfer rate of 100 °C/min at 1120 °C for 5 minutes. The Fe–2Cu–0.8C–0.6Mo sample has the highest relative sintered density (97.20%), hardness (96 HRB), and ultimate tensile strength (1000 MPa) compare with the other sintered compacts. AlCrN coating was deposited on Fe, Fe–2Cu, Fe–2Cu–0.8C, Fe–2Cu–0.8C–0.2Mo, Fe–2Cu–0.8C–0.4Mo, and Fe–2Cu–0.8C–0.6Mo samples, using the cathodic arc plasma–physical vapor deposition (CAP-PVD) process. The coated compact samples’ metallography images were examined using a Scanning Electron Microscope (SEM); the Fe–2Cu alloy sintered sample has obtained a uniform structure with high density and a smaller amount of corrosion penetration rate (0.6579 mmpy) as compared to the counterparts. The phase formed in the AlCrN coating was analyzed using the X-ray Diffraction (XRD). The Fe–2Cu–0.8C–0.6Mo coated compact sample exhibited higher hardness (1134.85 HV0.3) than the other coated compact samples. The Fe–2Cu–0.8C–0.2Mo coated compact sample has proven better corrosion resistance compared to the other coated compact sample.
Highlights
The results have proven that the corrosion and wear resistance is higher for TiCN coated samples
Scanning Electron Microscope (SEM) Investigation cross-sectional observation confirms that the AlCrN monolayer coating obtained above the substrate, The microstructure of the AlCrN monolayer coating deposited on Fe and Fe–2Cu alloys is and the SEM photomicrograph shows that the AlCrN monolayer is adequately bonded with the shown in Figures 6 and 7
AlCrN monolayer coating was deposited on the sintered compact samples, using the cathodic arc plasma–physical vapor deposition (CAP-PVD) process, electrochemical corrosion resistance of the Fe alloys with and without coating was investigated, the following conclusions are made:
Summary
Physical vapor deposition is one of the methods adopted commonly to improve the steel substrate’s surface qualities The surface qualities such as wear resistance, corrosion resistance, strength, hardness, smooth surface, and refined grains can be obtained by PVD coating. TiN coating obtained on 100Cr6 steel substrate has higher wear resistance due to high adhesion strength These coatings are produced with a hard and dense structure to enhance surface topography [14]. The pure Fe, Fe–2Cu, Fe–2Cu–0.8C, Fe–2Cu–0.8C with varying weight percentages (0.2%, 0.4%, and 0.6%) in the present work molybdenum compositions compacts were fabricated by using a spark plasma sintering process Their mechanical properties for the parent materials were studied and reported. The characteristics of AlCrN coating were analyzed and assessed for its suitability for automotive applications
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