Biomedical grade of titanium alloys are prone to undergo degradation in body fluid environment. Surface coating such as Physical Vapor Deposition (PVD) can serve as one of the alternatives to minimize this issue. Past reports highlighted that coated PVD.layer consists of pores, pin holes and columnar growth which act as channels for the aggressive medium to attack the substrate. Duplex and multilayer coatings seem able to address this issue at certain extent but at the expense of manufacturing time and cost. In the present work, the effect of ultrasonic vibration parameters on PVD-Titanium Nitride (TiN) coated Ti-13Zr-13Nb biomedical alloy was studied. Disk type samples were prepared and coated with TiN at various conditions: bias voltage (-125V), substrate temperature (100 to 300°C) and nitrogen gas flow rate (100 to 300 seem). Ultrasonic vibration was then subsequently applied on extreme high and low conditions of TiN coated samples at two different frequencies (8 kHz, 16 kHz) and t.....

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