ADM80007 Mapinder Singh Pan nu [ 101350913 ] Physical vapour deposition in Aerospace For increase of reliability and lifetime of mechanical components Physical Vapour Deposition (1) • Physical vapour deposition is a vacuum deposition method. • It is used to form thin coating on materials. • PVD comprises condensation and evaporation of material. • Common coatings applied by PVD are Chromium nitride, titanium aluminium nitride, titanium nitride. 1 Physical Vapour Deposition • Physical vapour deposition is used for high melting point and low vapour pressure materials. • PVD is carried out at high temperature. • In PVD, materials goes through condensed phase followed by vapour phase and then return to thin film condensed phase. 2 (a) Different phases involved in PVD. (2) (1). Asghar, M 2017, "Muhammad Ali Asghar", Slideshare.net, viewed 6 April, 2 017, . (2). Anon 2017, "Physical vapor deposition", En.wikipedia.org, viewed 9 April, 2017, . Conclusion to Experiment (3) • While concluding the experimental results, it can be clearly concluded that erosion is the major factor which damages the aircraft compressor blades. • So the basic criteria of choosing the suitable coating is the erosion test. • The coating which should be chosen, should be corrosion resistant also because corrosion accelerates the surface erosion. • Corrosion test helps to choose best physical vapour deposition method for aircraft compresser blades. • From the above experiment ( Ti , Al)N coating is resulted best coating from all other coatings. (3). Anon 2017, viewed 8 April, 2017, . 8 Solution to protect aircraft blades from different erosion effects Selection of different coatings for different blade materials (7) 9 Blade Materials Coating Method 18H2N4WA Ni Electroplating 18H2N4WA Ni - Cd Electroplating E1961 Al Pack Cementation E1961 NiAl Ni, electroplating E1961 TiN PVD E1961 TiN PVD E1961 (Ti,Al )N PVD Blade Material Coating Method E1961 Zn - Al Pack Cementation E1961 TiN PVD E1961 ( Ti,Al )N PVD E1961 TiN (Pt) TiN , PVD E1961 Epoxide Paint 10 (7). Sartwell, B 2017, "Surface & Coatings Technology", Google Books, viewed 9 April, 2017, .