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Structural features of composite electrochemical coatings nickel – diamond
https://doi.org/10.22349/1994-6716-2024-118-2-55-61
Abstract
The paper studies the structure of nickel-diamond composite electrochemical coatings obtained from the suspension electrolyte with ASM 7/5 powder. When the content of diamond powder in the electrolyte is 10 g/l, coatings are deposited with a uniform distribution of the reinforcing phase and a diamond volume fraction of up to 20%. Studies of the structure of the nickel coating matrix have revealed that, in comparison with standard galvanic nickel, which has a pronounced texture, the composite coating matrix has a finely dispersed structure with random grain orientation. Comparative measurements of nanohardness made it possible to record the strengthening of composite coatings matrix compared to galvanic nickel. Along with the high hardness of the reinforcing component and the relatively large particle size, this determines the high microhardness of the composite coating, which averages 860 HV.
Keywords
composite electrochemical coatings,
nickel – diamond,
electrolyte suspension,
structure studies,
nanohardness
Supporting agencies: Experimental studies were performed on the equipment of the Center for Collective Use “Composition, Structure and Properties of Structural and Functional Materials” of the NRC “Kurchatov Institute” – CRISM “Prometey”. The author expresses special gratitude to the engineer 2nd category of the Center for Collective Use of Scientific Equipment M.V. Staritsyn for his contribution to the study of the structure of coatings and engineer 1st category A.A. Kashirina for assistance in researching the properties of coatings.
About the Author
A. V. Krasikov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Cand Sc. (Chem).
49 Shpalernaya St, 191015 St Petersburg
References
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Review
For citations:
Krasikov A.V. Structural features of composite electrochemical coatings nickel – diamond. Voprosy Materialovedeniya. 2024;(2(118)):55-61. (In Russ.) https://doi.org/10.22349/1994-6716-2024-118-2-55-61
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