Formation of protective coatings on steel Kh12MF by the force of the sequential electric spark treatment by boride and carbon-containing electrodes

Coatings on steel Kh12MF are fabricated by the force of electric-spark treatment by the TiB 2 -20% NiAl electrode and carbon-containing materials. Kinetics of their formation, the phase composition, mechanical and tribological properties, roughness, and durability to high-temperature oxidation are i...

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Bibliographic Details
Published in:Russian journal of non-ferrous metals 2014-03, Vol.55 (2), p.205-211
Main Authors: Zamulaeva, E. I., Levashov, E. A., Pogozhev, Yu. S., Sviridova, T. A., Petrzhik, M. I., Kudryashov, A. E.
Format: Article
Language:English
Subjects:
Borides
Chemistry and Materials Science
Coatings
Durability
Electrodes
Intermetallic compounds
Intermetallics
Materials Science
Metallic Materials
Nanostructured Materials and Functional Coatings
Nickel aluminides
Oxidation
Tribology
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Summary:Coatings on steel Kh12MF are fabricated by the force of electric-spark treatment by the TiB 2 -20% NiAl electrode and carbon-containing materials. Kinetics of their formation, the phase composition, mechanical and tribological properties, roughness, and durability to high-temperature oxidation are investigated. When depositing the coating using the TiB 2 -20% NiAl electrode, the effect of a disproportionate increase in the substrate erosion, which is observed with an increase in the energy of a single pulse and leads to lowering the content of boride phases in the coating is discovered. The subsequent electric-spark treatment of the boride coating using an electrode made of fine-grain dense graphite led to a noticeable improvement of tribological properties of the coating having no noticeable effect on its durability to high-temperature oxidation. In the case of applying an electrode made of the silicicated composition material, the coating durability to high-temperature oxidation increased substantially, but no improvement of tribological properties was observed.
ISSN:1067-8212
1934-970X
DOI:10.3103/S1067821214020217