Effect of High-Temperature Treatment of Bronze Particles on the Characteristics of Coatings Formed by the Method of Cold Gas-Dynamic Spraying
A. E. Chesnokov, S. V. Klinkov, V. F. Kosarev, A. V. Smirnov, V. S. Shikalov, T. M. Vidyuk
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: cold gas-dynamic spraying, bronze coatings, muffle vacuum furnace, microhardness, porosity, coherent scattering region, X-ray phase analysis
Abstract
Effect of preliminary heat treatment of CuAl10Fe3Mn2 bronze particles in the working chamber of a furnace with varying atmosphere on the process of applying coatings by cold gas-dynamic spraying and their properties is experimentally studied. It is shown that an temperature rise in the working chamber of the furnace reduces the microhardness of the material from HV0.025 = 240 to HV0.025 = 115. It is noted that the spraying process is accompanied by an increase in the specific mass of the coatings from 1.62 to 3.50 kg/m2. It is shown by the study of the surface structure and physical characteristics that, for the coatings obtained from the original bronze powder, porosity is 2%, the arithmetic mean of the absolute values of profile deviations within the base length Ra = 27 µm, and microhardness is HV1 = 250. For the coatings obtained from heat-treated bronze powder, porosity is 5%, Ra = 21 µm, and microhardness is HV0.1 = 300.
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