Influence of the powder mixture composition on the deposition coefficient and the properties of NI+B4C CGDS coatings
| Autor: | V. M. Fomin, A. A. Polukhin, N. S. Ryashin, V. S. Shikalov, V. F. Kosarev |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Composite number Metallurgy Abrasive General Physics and Astronomy 02 engineering and technology Boron carbide Cermet engineering.material Microstructure 01 natural sciences Indentation hardness chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Coating Mechanics of Materials 0103 physical sciences engineering Composite material Powder mixture |
| Zdroj: | Mechanics of Solids. 52:457-464 |
| ISSN: | 1934-7936 0025-6544 |
| DOI: | 10.3103/s0025654417040136 |
| Popis: | The cold gas dynamic spray (CGDS) method used to form composite Ni+B4C coatings from mechanical powder mixture with various content of abrasive components is investigated, and the surface and microstructure of these coatings are considered. An experimental dependence of the deposition coefficient on the abrasive content in the mechanical powder mixture is obtained. The coatings are studied by interference profilometry, optical microscopy, and microindentation methods. The dependence of the bulk and mass B4C content in the sprayed material on the abrasive content in the sprayed powder mixture is obtained. The bulk B4C content in the coating c V ≈ 0.27 is attained. The dependence of the microhardness of composite CGDS coatings on the boron carbide content in them is investigated. The results of this paper demonstrate that the powder mixture composition significantly affects the CGDS coating growth and the properties of these coatings and can be used to control the properties of the CGDS cermet materials. |
| Databáze: | OpenAIRE |
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