Preconditions and features of diffusive nickel plating of alloys of EP202 type in lithium melt

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Datsii O. I., Palamar O. O., Shakhbazov Ya. O., Shyrokov O. V., Shyrokov V. V. № 2 (53) 80-92 Image Image

The expediency of diffusive nickel plating of heat-resistant alloys of KHN67MVTJU (ЕП202) type in lithium melt has been grounded for the operation in conditions of high-speed, high-temperature oxidative gas flows. We have found out that alloys of this type has a relatively low thermal conductivity, and therefore high susceptibility to ignition. The thermal conductivity of nickel is 7 times more, and it can be the basis of protective coatings and alternative to expensive palladium. The features of formation of diffusive nickel coatings and their influence on physic-mechanical properties and the resistance to the alloy oxidation have been studied. It is shown that the effect of diffusive nickel plating in lithium on the mechanical properties and the quality of the machine-processed surfaces is insignificant.

Keywords: coating, alloys, nickel, lithium melt, temperature, mechanical properties, heat resistance, structure, phase composition.


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