Structure and properties of aluminum coatings obtained by the cold gas-dynamic spraying method
L.I. Tushinsky1, A.P. Alkhimov2, V.F. Kosarev2, A.V. Plokhov1, and N.S. Mochalina1
1Novosibirsk State Technical University, Novosibirsk, Russia
2Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 125-129
Abstract
Structure and properties of aluminum coatings deposited onto steel substrates by the cold gas-dynamic spraying (CGS) method were examined. Aluminum CGS coatings fundamentally differ from their thermal counterparts as they enable the formation of heavy-duty layers of metal particles on substrates at temperatures below 500 K. A dense, low-porosity coating is found to form, tightly bound to the base metal. The adhesion strength is shown to weakly depend on the thickness of the sprayed coating due to the compressive stress present in the surface layer. A qualitative model for the coating formation process is proposed.
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