Setting the functional properties of TiNi alloys during ion-plasma coating deposition process

The aim of the present work is to study influence technological parameters ion-plasma treatment (IPT) on functional properties a TiNi shape memory alloy and its biocompatibility. object was Ti–50.8 at. % Ni alloy, widely applied in medical devices. IPT carried out by vacuum-arc evaporation titanium cathode at different values bias potential (0, –100, –500 V), followed TiN deposition. after were investigated using differential scanning calorimetry. biocompatible evaluated atomic emission spectrometry measure nickel concentration one year holding TiN-coated samples 0.9 NaCl solution. It has been determined that setting temperature regime heating due process, it possible change interval realization thermoelastic martensitic transformations, and, consequently, response devices made this i. e. set necessary properties. comparative analysis characteristic temperatures heat treatments allow us conclude proposed method for calculation substrate correct IPT. calculated ~275 °C zero potential, which sufficient shift alloy. during deposition ~400 – 100 V above 600 500 bias, respectively. model solution did not exceed 0.14 mg/l holding, indicates high biocompatibility samples.