Morphological features of the copper surface layer under sliding with high density electric current

Journal Article · Tue Oct 27 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4932742· OSTI ID:22492521

Fadin, V. V., E-mail: [e-mail] ^[1]; Aleutdinova, M. I., E-mail: [e-mail] ^[1]; Seversk Technological Institute, Branch of State Autonomous Educational Institution of Higher Professional Education “National Research Nuclear University “MEPhI”, Seversk, 636036 ^[2]; Rubtsov, V. Ye., E-mail: [e-mail] ^[1]; National Research Tomsk Polytechnic University, Tomsk, 634050 ^[2]; Aleutdinova, V. A., E-mail: [e-mail] ^[3]

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1. Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055 (Russian Federation)
2. (Russian Federation)
3. National Research St. Petersburg State Polytechnical University, St. Petersburg, 195251 (Russian Federation)

Conductivity and wear intensity of copper under the influence of dry friction and electric current with contact density higher 100 A/cm{sup 2} are presented. It is shown that an increase in hardness and heat outflow from a friction zone leads to the reduction of wear intensity and current contact density increase corresponding to the beginning of catastrophic wear. Structural changes, such as the formation of FeO oxide and α-Fe particles in the copper surface layer, have also been found. It is observed that a worn surface is deformed according to a viscous liquid mechanism. Such singularity is explained in terms of appearance of high-excited atomic states in deforming micro-volumes near contact spots that lead to easy stress relaxation by local plastic shears in the vicinity of stress concentrators. In common this effect allows to achieve high wear resistance.

• OSTI ID: 22492521
• Journal Information: AIP Conference Proceedings, Vol. 1683, Issue 1; Conference: International conference on advanced materials with hierarchical structure for new technologies and reliable structures 2015, Tomsk (Russian Federation), 21-25 Sep 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COPPER
DENSITY
ELECTRIC CURRENTS
FRICTION
HARDNESS
HEAT
IRON OXIDES
IRON-ALPHA
LAYERS
LIQUIDS
MORPHOLOGY
PLASTICITY
SHEAR
SINGULARITY
STRESS RELAXATION
STRESSES
SURFACES
WEAR
WEAR RESISTANCE