Damage of surfaces in sliding electrical contact copper/steel

Senouci, A.; Zaïdi, H.; Frêne, Jean; Bouchoucha, A.; Paulmier, D.

doi:10.1016/s0169-4332(98)00915-5

Cited by 56 publications

(19 citation statements)

References 3 publications

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“…It was also shown that the c-Cu worn subsurface consisted of a deformed layer with refined grain size [15], and a discontinuous or continuous oxide layer was formed on the surface of c-Cu and nc-Cu and their counterparts [12,14]. Furthermore, it has been shown (e.g., in [16][17][18]) that the nature of the copper oxides has an effect on both friction and wear. In [24] it was shown that a low sliding speed can induce a transferred layer leading to copper-copper contact and high CoF above 1.0, whereas, at higher speed less material transfer occurs leading to a lower CoF.…”

Section: Introductionmentioning

confidence: 98%

“…For Cu, the attemps to reduce wear and the friction force includes grain refinement [12][13][14][15], presence of oxide film/depris, tribolayer or mechanically mixed layer (MML) [5,[12][13][14][16][17][18][19][20], as well as alloying, and DS [4,5,[19][20][21][22][23]. The tribological behaviour of nano-and coarse-grained Cu has been studied in [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the wear and frictional properties of Cu matrix composites prepared by pulsed electric current sintering

Ritasalo¹,

Antonov²,

Veinthal³

et al. 2014

Proc. Estonian Acad. Sci.

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Wear performance of Cu matrix composites prepared by pulsed electric current sintering (PECS) was evaluated by using non-lubricated sliding tests. The studied materials contained cuprite (Cu 2 O), alumina (Al 2 O 3 ), titaniumdiboride (TiB 2 ) or diamond dispersoids in a coarse-grained Cu (c-Cu), submicron-grained Cu (sm-Cu), or nano-grained Cu (nCu) matrix. PECS compacted matrix materials were used as references. The ball-on-flat tests showed strong dependence of the coefficient of friction (CoF), wear rate and wear mechanism on the counter ball material. Cr-steel balls led to high CoF (0.71-1.01) and high wear rate (1.3 × 10 -5 -5.7 × 10 -3 mm 3 /Nm) depending on the test material and its reactivity with the counterpart. Cu-Cu 2 O yielded to lowest CoF and wear rate with a presence of oxidational and abrasive wear, whereas, Cu-Al 2 O 3 and Cu-diamond suffered of adhesive wear leading to much higher wear rates. On the other hand, alumina ceramic counterpart led to a considerably lower CoF (0.39-0.92) and wear rate (1.4 × 10 -7 -6.1 × 10 -6 [mm 3 /Nm]), and the test materials showed oxidational wear and material pile-up. Of the composites, Cu-diamond showed the lowest wear rate and Cu-Cu 2 O and Cu-diamond (5 nm) showed the lowest CoF against alumina. It is believed that the present work gives new insights for materials selection, e.g., in electronic connector parts.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Comparison of the wear and frictional properties of Cu matrix composites prepared by pulsed electric current sintering

Ritasalo¹,

Antonov²,

Veinthal³

et al. 2014

Proc. Estonian Acad. Sci.

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“…The heat was one of the critical factors in the formation of the oxide layer. Some research has stated that surface oxide films were beneficial to friction and wear processes [11,12]. However, the cracking and shedding of oxide films were responsible for the generation of debris.…”

Section: Introductionmentioning

confidence: 99%

Analysis of abnormal wear on a certain type of CRH380 high‐speed railway grounding brush

Wang

Liu

Che

et al. 2020

Materialwissenschaft Werkst

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This paper investigated the causes of premature wear of grounding brushes in high-speed train which was less than 40 % of design service life. The grounding brushes were analyzed from the material composition, microstructure and mechanical property under different wear conditions. The results indicated that their material composition and microstructure were basically identical, and the phase compositions of the four samples were mainly copper (Cu) and carbon (C). There were no obvious defects in the structure. The load differences will give rise to vibration of the friction pairs and lead to electrical erosion on the worn surface. The electrical erosion produced oxides and fused hard particles as well as caused abrasive wear. The test results also indicated that the spring-induced gap across the contact surfaces resulted in electrical erosion. Keywords:High-speed train / grounding brush / abrasive wear / spring-induced gap / electrical erosion Schlüsselwörter: Hochgeschwindigkeitszug / Erdungsbürste / abrasiver Verschleiß / federinduzierter Spalt / Elektroerosion

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“…Plastic deformation, compressive residual stress, and grain refinement are introduced at the sub-surface of the specimen if the shock wave is sufficiently large [14]. Subsequently, the laser shock-peened specimen will exhibit superior fatigue strength, wear resistance, and corrosion resistance [15,16].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Wear Resistance in Laser Shock-Peened Copper Contacts

Jung¹,

Park²,

Chun³

et al. 2020

Korean J. Met. Mater.

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This study investigated the influence of laser shock peening without coating (LSPw/oC) on the degradation of copper electrical contacts. A theoretical calculation of the plastic-affected depth (PAD) induced by LSPw/oC was performed, based on the laser-induced plasma pressure along with the Hugoniot elastic limit of our LSPw/oC experimental conditions. The theoretical PAD was obtained approximately 650 µm from the surface for the LSPw/oC at the laser energy density of 5.3 GW/cm2. Various characterization methods such as the Vicker’s hardness test, residual stress test, and electron backscattered diffraction (EBSD) mapping indicated the PAD may play a significant role in laser induced effective depth for LSPw/oC. At a laser energy density of 5.3 GW/cm2, the laser shock-peened copper showed approximately double the surface hardness as compared to the pure copper. This was attributed to grain refinement, which was confirmed by measuring average grain sizes, and by observing mechanical twin structures from the EBSD analysis. Additionally, a compressive residual stress was induced down to the PAD but gradually switched to a tensile residual stress below PAD. The surface hardening effect conferred by LSPw/oC to the pure copper surface resulted in excellent wear resistance, i.e., a low coefficient of friction and wear loss. As a result, the contact exhibited lower electrical resistance following the fretting friction test compared to pure copper; this would result in a significant delay in electrical contact failure.

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Damage of surfaces in sliding electrical contact copper/steel

Cited by 56 publications

References 3 publications

Comparison of the wear and frictional properties of Cu matrix composites prepared by pulsed electric current sintering

Comparison of the wear and frictional properties of Cu matrix composites prepared by pulsed electric current sintering

Analysis of abnormal wear on a certain type of CRH380 high‐speed railway grounding brush

Improvement of Wear Resistance in Laser Shock-Peened Copper Contacts

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