Morphological Features of the Copper Surface Layer under Sliding with High Density Electric Current

被引：3

作者：

Fadin, V. V. ^{[1
]}

Aleutdinova, M. I. ^{[1
,2
]}

Rubtsov, V. Ye ^{[1
,3
]}

Aleutdinova, V. A. ^{[4
]}

机构：

[1] Inst Strength Phys & Mat Sci SB RAS, Tomsk 634055, Russia

[2] Nat Res Nucl Univ MEPhI, Seversk Technol Inst, Branch State Autonomous Educ Inst Higher Profess, Seversk 636036, Russia

[3] Natl Res Tomsk Polytech Univ, Tomsk 634050, Russia

[4] Natl Res St Petersburg State Polytech Univ, St Petersburg 195251, Russia

来源：

INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2015 | 2015年 / 1683卷

关键词：

high-excited atomic states; shear instability of material; wear intensity; deterioration of surface layer; phase composition; sliding electric contact; high current density; FRICTION; WEAR;

D O I：

10.1063/1.4932742

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Conductivity and wear intensity of copper under the influence of dry friction and electric current with contact density higher 100 A/cm(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 alpha-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.

引用

页数：5