Numerical Cold Spraying Tool

The parameter selection map is a tool that is helpful for illustrating the set of process parameter combinations that are desirable for obtaining specific coating properties. In [1] Assadi explains how the ratio between the impact velocity and the critical velocity of particles “n” can be used in order to predict the coating properties of any material without dependence on the powder material size distribution

“A value of n=1 means that the powder material will initiate deposition presenting a deposition efficiency of a ~50%; at n=1.5 the optimal process parameters are reached for production of high quality coatings, i.e deposition efficiency of ~100%. At n=2 and higher values the coating properties start to decrease due the erosion caused by the excessive spraying parameters – [1].”

[1] H. Assadi, T. Schmidt, H. Richter, J.-O. Kliemann, K. Binder, F. Gärtner, T. Klassen, H. Kreye, On parameter selection in cold spraying, J. Therm. Spray Technol., in press.
For the numerical tool two parameter selection maps were developed:

  1. 1. (Left picture) Illustrates the dependence of the ratio “n” with the stagnation temperature “T0” and pressure “P0” during operation with a constant particle parameter “dp”.
  2. 2. (Right picture) Illustrates the dependence of the ratio “n” with thestagnation temperature “T0” and the size of the particles “dp” within a constant gas pressure “P0”.

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This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement n° ACS3-GA-2013-605207. This document and all information contained herein is the sole property of the CORSAIR Consortium or the company referred to in the slides. It may contain information subject to Intellectual Property Rights. No Intellectual Property Rights are granted by the delivery of this document or the disclosure of its content. Reproduction or circulation of this document to any third party is prohibited without the consent of the author(s). The statements made herein do not necessarily have the consent or agreement of the CORSAIR consortium and represent the opinion and findings of the author(s).

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