This work investigates electrochemical response and mechanical properties of quaternary Ti51Si24Ni14Nb11 and Fe40Ti30Al18Si12 (at.%) thin film metallic glasses (TFMGs) developed using magnetron co-sputtering. Both TFMGs demonstrate superior corrosion resistance registering ∼7 to 10 times smaller corrosion current density, ∼200 to 800 mV higher break-down potential, and ∼4 to 6 times higher charge transfer resistance in phosphate buffer saline (PBS) and 0.9% sodium chloride (NaCl) compared to conventional Ti- and Fe-based biomaterials, e.g., commercially pure Ti (cp-Ti) and 316L stainless steel (SS). The enhanced anti-corrosive behavior of the quaternary films is attributed to their amorphous structures and relatively more protective passive oxide films. In addition, nano-indentation experiment reveals more than 2 times higher hardness and ∼10 to 40 GPa lower elastic modulus of the TFMGs compared to conventional biomaterials. The combination of obtained anti-corrosive behavior and mechanical properties promotes the fabricated films as potential candidates for future bio-implant applications.
- Thin film metallic glass