Investigation of non ferrous materials by doing surface process with PIII&D method

Plasma immersion ion implantation and deposition that is developed in order to modify the mechanical and chemical surface properties of metals like conventional beam line ion implantation, use energetic particles (ions) which is implanted the near surface of materials. In PIIID, sample is immersed to plasma and exposed to negative high pulsed voltages. Ions (generally nitrogen ions) are implanted to sample surface by accelerating ions through the electrical field. Most important advantage of PIII&D is the simultaneously implantation at all sides of sample (except the surface of sample that is in contact with substrate holder). Due to the excellent properties of titanium and its alloys nowadays they are used many industries and commonly used in medical industry especially being the prosthesis material. Ti6Al7Nb alloy hasn't common usage in mechanical engineering because of having weak surface hardeness and wear resistance. In this thesis, the atomic force microscope (AFM), X-Ray photoelectron spectroscopy (XPS) and electrochemical corrosion resistance of surface and sub-surface layers of Ti6Al7Nb alloy that are treated by PIII&D method in nitrogen plasma, are done. In consequence of the XPS analysis, it is determined that developing of Silver which is increasing directly proportional with pulse time and deposition voltagethe surface of Ti6Al7Nb alloy. These layers are supported by AFM analysis. Electrochemical corrosion resistance behavior of this layer were examined.