DOI: 10.18503/1995-2732-2021-19-2-40-49
Abstract
This paper is devoted to the study of the microstructure and properties of composite coatings of the Cu-W system applied by cold gas-dynamic spraying (CS). The process under consideration makes it possible to obtain high-quality coatings from different types of materials. CS is widely used and studied due to its technological simplicity, a wide range of sprayed materials and operating temperatures. In this process, a particle hits the substrate at high velocity to produce a strong plastic deformation and then creates a coating. Due to lower temperature and higher velocity than thermal spraying, the cold spray process is increasingly being used in the industry for protective coatings. The characteristics of particle deposition and coating formation in cold spraying are different from thermal spraying. Many theoretical studies of the cold spray process have contributed to the development of high performance coatings, making cold spray a popular research area. However, there are some technological challenges that arise when spraying low melting point materials. During softening, particles stick to the walls of the tooling (nozzle) and block spraying. In practice, this problem is solved by adding ceramic particles and spraying powder mixture. As a result, the formed coating will have better mechanical properties, and the technological problem will be solved. The paper summarizes the results of microstructure studies and practical experiments and compares them with other methods of coating deposition. The experimental method of sample preparation and the equipment used are given. The paper shows the microstructure before and after thermal treatment of sprayed samples, and measurements of microhardness and thermal conductivity.
Keywords
Cold gas-dynamic spraying, coating, copper, tungsten, powder.
For citation
Latfulina Yu.S., Doubenskaia M., Samodurova M.N., Trofimov E.A., Barkov L.A. Implementation of a Copper- Tungsten Coating by Cold Gas-Dynamic Spraying. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2021, vol. 19, no. 2, pp. 40–49. https://doi.org/10.18503/1995-2732-2021-19-2-40-49
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