Surface Coating of Tungsten Carbide by Electric Exploding of Contact

Journal Article · Mon Jan 17 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3552381· OSTI ID:21511453

Grigoryev, Evgeny G ^[1]

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1. General Physics Department, Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 115409 (Russian Federation)

Electric exploding of a tungsten carbide--cobalt material near-by high-speed steel surface forms on it a hardening coating. The essential structure properties of the formed coatings are determined by parameters of contact exploding electrode at the pulse current amplitude from above 106 A/cm2 and duration less than 10-4 s. The metallographic investigations of coating structures were done by microscope 'Neophot-24'. They have shown that the contact electric exploding caused the transfer of tungsten carbide and cobalt on the surface of high-speed steel. The breakdown of tungsten carbide--cobalt material took place during electrical exploding. The hardening layers of tungsten carbide and pure nanocrystalline tungsten have been formed upon the surface of high-speed steel as a result of electric exploding. Crystalline grains of tungsten have an almost spherical form and their characteristic size less than 400 nanometers. Micro hardness of the coating layers and high-speed steel structures was measured.

• OSTI ID: 21511453
• Journal Information: AIP Conference Proceedings, Vol. 1315, Issue 1; Conference: AMPT2010: International conference on advances in materials and processing technologies, Paris (France), 24-27 Oct 2010; Other Information: DOI: 10.1063/1.3552381; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMPLITUDES
BREAKDOWN
COATINGS
COBALT
CRYSTALS
ELECTRIC CONTACTS
ELECTRODES
HARDENING
HARDNESS
LAYERS
METALLOGRAPHY
MICROSCOPES
NANOSTRUCTURES
PULSES
SPHERICAL CONFIGURATION
STEELS
SURFACE COATING
SURFACES
TUNGSTEN CARBIDES
VELOCITY
ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CONFIGURATION
DEPOSITION
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
METALS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN COMPOUNDS