A. N. Papyrin, Cold Spray Technology, Albuquerque, NM; V. F. Kosarev, S. V. Klinkov, A. A. Sova, Khristianovich Institute of Theoretical and Applied Mechanics of Russian Academy of Science, Novosibirsk, Russia
Cold Spray process is based on the effect of transition from substrate erosion to the coating formation process under its treatment by flow of solid particles. It is well known that the transition takes place when particle velocity exceed some critical value Vcr, and it is affected by several factors including particle and substrate materials, particle size and temperature, state of substrate surface and its temperature, etc.
This paper presents some results of experimental study of the transition and the coating formation processes under spraying metal/ceramics (composites) powders. Mixtures of metals (Al, Cu) and ceramic powders were sprayed on a steel substrate. Dependences of deposition efficiency and coating structure on the content of hard phase were studied. It is shown that addition of hard powder to metals allows to activate the spray process-to provide effect of the transition at lower spray parameters and to increase deposition efficiency as compared to pure metals.
This paper presents some results of experimental study of the effect of transition from the substrate erosion to the coating formation process under spraying metal/ceramics (composites) powders.
Mixtures of metals (Al, Cu) and ceramic powders were sprayed on a steel substrate.
Dependence of deposition efficiency and coating structure on the content of hard phase is studied. It is shown that addition of hard powder to metals allows to activate the spray process-to provide effect of transition at lower spray parameters and to increase deposition efficiency as compared to pure metals.
