DEVELOPMENT OF THE CHEMICAL VAPOR DEPOSITION PROCESS FOR APPLYING MOLYBDENUM COATINGS ON THE COMPONENTS IN ASSEMBLY AND ENGINE CONSTRUCTION
| Autor: | Roman Popenchuk, Vlad Sagalovych, Stas Dudnik, Alex Sagalovych, Viktor Popov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy 0211 other engineering and technologies Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Chemical vapor deposition Surface finish engineering.material Indentation hardness Industrial and Manufacturing Engineering molybdenum-carbide coating molybdenum Coating Management of Technology and Innovation 021105 building & construction lcsh:Technology (General) 0202 electrical engineering electronic engineering information engineering lcsh:Industry Electrical and Electronic Engineering Composite material Applied Mathematics Mechanical Engineering CVD processes Tribology Microstructure Computer Science Applications chemistry Control and Systems Engineering Molybdenum properties of coatings engineering Lubrication lcsh:T1-995 lcsh:HD2321-4730.9 tribological characteristics development of technologies |
| Zdroj: | BASE-Bielefeld Academic Search Engine The Lens Eastern-European Journal of Enterprise Technologies, Vol 2, Iss 12 (104), Pp 6-15 (2020) |
| Popis: | The process of chemical vapor deposition of Mo and Mo-С coatings was studied by means of thermal decomposition of molybdenum hexacarbonyl. The kinetics of the coating growth in the range of 480°C–540°C and the pressure in the reaction volume from 9Pa to 16Pa were explored. The dependences of coating growth rate, the magnitudes of their microhardness on the parameters of their obtaining, as well as the changes in the morphology of the coating surface, roughness, and structure, were established. The tribological properties of the obtained coatings coupled with bronze Br.Su3H3S20F0.2 were explored at the friction machine 2070 SMT-1 according to the "cube–roller" scheme in a load interval of 0.2–1.4kN. The lubrication during determining the friction coefficients was carried out by immersion of the movable counter body into a bath with fuel TC-1, GOST 10227-86. It was necessary to conduct such research because there is insufficient information when it comes to the specific equipment and peculiarities of the object onto which a coating is applied. When developing the process of coating application on specific components, techniques, and means to ensure the uniformity of parts heating and precursor feeding to their surface were tested. As a result of the conducted studies, we obtained the regions of parameters of obtaining coatings with different structure, rate, hardness, as well as the patterns of changes in these characteristics at the change of the basic parameters of the process of obtaining such coatings. Depending on application conditions, coatings may have hardness from ~11,000MPa to 18,000MPa at a growth rate from 50μm/h to 170μm/h. The mean values of the friction coefficient of coatings with different microstructure and microhardness were 0.101 at the load of 0.2kN and 0.077 at the load of 1.4kN. Based on the conducted research, it was possible to develop the process of applying the metal and metal-carbide molybdenum-based CVD coatings in regards to the components of the assembly and engine construction, which can serve as the basis for the development of industrial technologies |
| Databáze: | OpenAIRE |
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