Electrospark Coatings Based on WC-Co Alloys with Aluminium Oxide and Carbon Additives

Sergey A. Pyachin, Sergey V. Nikolenko, Alexander A. Burkov, Nikolay A. Suy

Institute of Materials, Khabarovsk Scientific Centre, Far East Branch, Russian Academy of Sciences, Khabarovsk, Russia..

DOI: 10.4236/msa.2013.43022                

Abstract

The structure and properties of coatings based on WC-Co alloys containing additives of 1% - 5% aluminium oxide and 2.5% - 4.5% carbon were investigated. The coatings had a nanocrystalline structure. Depending on the duration and frequency of the discharge pulses, the ratio between WC and W₂C in the coatings was different. The additives in the hard alloy allowed us increase the microhardness and wear resistance of the coatings by a factor of 2 - 3 in comparison to coatings created using a conventional WC-10%Co alloy.

Keywords

Electrospark Deposition; Coatings; Tungsten Carbide; Carbon; Aluminium Oxide; Wear; Microhardness

Conflicts of Interest

The authors declare no conflicts of interest.

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