Pitfalls of Spray Coating Analyses

Wednesday, May 13, 2015: 9:00 AM
Room 104A (Long Beach Convention and Entertainment Center)
Dr. Frank Gaertner , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mr. Matthias Schulze , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mrs. Camilla Schulze , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mr. Uwe Wagener , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mr. Thomas Breckwoldt , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Dr. Kurt Binder , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Prof. Hamid Assadi , 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
Quality assessment of thermal spray coatings in the first instance often relies on microstructural analyses and bond strength testing. In addition, functional properties of coatings with respect to the intended applications may have to be investigated. Nevertheless, these procedures can easily fail to supply suitable information on coating quality. For the examples of flame sprayed bronze and cold sprayed titanium coatings, data from microstructural analysis, mechanical testing and electrical measurements are analysed and discussed under viewpoints of current applications and needed performance. By suitable correlations, information on the significance of individual test procedures can be derived. For example, hardness testing supplies information on coating porosity and possible oxidation, but not on mechanical strength. On the other hand, information on mechanical strength can be derived from electrical conductivities. Correlating results from different test procedures, the present contribution aims to provide guidelines for effective, time saving and conclusive coating characterization.
See more of: Characterization & Testing: Mechanical Properties
See more of: Fundamentals/R&D