Substrate influence on cold gas sprayed titanium coatings

Tuesday, May 12, 2015: 8:20 AM
Room 101B (Long Beach Convention and Entertainment Center)
Dr. Marķa villa , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
N/A Felix Haeussler , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Prof. H. assadi , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Dr. Frank Gaertner , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Prof. Thomas Klassen , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Titanium alloys are getting increasingly popular in the aerospace and medical industries. For pure titanium, high quality coatings can be obtained by using high process gas temperatures and pressures. Coating build in CS is not only determined by respective materials properties and the impact conditions, but also by properties of the substrate and already adhered layers. In the present study, cold spraying of spherical titanium grade II powders was performed on titanium grade II, copper and stainless steel substrates, using two sets of parameters and three different substrate temperatures. Single impacts were produced by so-called wipe tests and respective particle adhesion was investigated by applying a modified cavitation test. As the substrate temperature increases higher bond strengths were achieved. For deposited coatings, improved properties are observed for increased substrate temperatures as long as oxidation can be avoided. Coating performance also improves with increased resistance of the substrate against deformation.
See more of: Testing and Characterization 2
See more of: Thermal Spray Applications