Abstract
Novel Fe46Cr23Mo14Co7B5Si5 and Fe40Cr23Mo14Co7P6B5Si5 thin film metallic glasses (TFMGs) were successfully deposited using direct current magnetron sputtering process. Different microstructural evaluations were carried out including XRD, FE-SEM, EPMA, AFM, and TEM-SAED. Mechanical properties such as nano-indentation and fracture toughness tests were also performed on different substrates and under various applied forces. In addition, corrosion performance was carried out by potentiodynamic polarization, potentiostatic and electrochemical impedance spectroscopy tests. Formation of full, glassy phase was confirmed by XRD as well as TEM-SAED for both films. It was found that adding P element changed the cross-sectional growth of TFMG, decreased surface roughness and improved mechanical properties. It was also shown that the substrate type had minor influence on the fracture toughness values of TFMGs as compared to the applied force. P addition also led in an excellent corrosion resistance and significantly increase in polarization resistance, with more than 400 times as compared to the one for SS304 substrate.
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