Moskva, Moscow, Russian Federation
The method of coatings producing by chemical vapor deposition from gas phase by pyrolysis of organometallic com-pounds of chromium on the aluminum alloy AL9 is described. For the research the “Barhos” liquid with bis-arene chromium organic compounds, containing bis-ethylbenzene chromium (322 ºC boiling point, decomposition temperature of the metal is 330 ºC), was selected. The chromium content in the liquid is not less than 16%.The deposition process depends on the gas-phase chromium: substrate temperature, reactor pressure, evaporator temperature, process duration. The deposition temperature (substrate temperature) is one of the major factors in the formation of coatings. It is determined, that the pyrolytic chromium coatings are characterized by high hardness (up to 16000 MPa) and wear resistance due to the amorphous structure, which allows them to improve the wear resistance of rubbing parts.
pyrolytic chromium coating, vapor deposition bis-arene chromium compounds, hardness, wear resistance.
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