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Influence of the contact parameters and several graphite materials on the tribological behaviour of graphite/copper two-disc electrical contacts
Kalin, Mitjan (Avtor), Poljanec, Dejan (Avtor)

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URLURL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S0301679X18302524?via%3Dihub Povezava se odpre v novem oknu

Izvleček
This paper reports on the performance and tribological mechanisms in a newly developed design for an electrical sliding contact in terms of sliding velocity, normal force and electrical current during 24-h experiments. Copper discs were run against hard-carbon graphite, electrographite and polymer-bonded graphite. The average wear rates of the copper discs against the three graphite materials were reduced to 10[-8] and 10[-7] mm3/Nm, and the graphite discs to 10[-6] mm3/Nm, which is for 1 and 1-2 orders of magnitude less, than copper slip-rings and carbon brushes in conventional systems, respectively. The coefficient of friction was 0.2-0.4, depending on the conditions, which is comparable to the values of conventional electrical sliding contact. Tribofilms are generated in almost all contacts, and crucially determine the contact performance. The polymer-bonded-graphite/Cu formed the most compliant tribofilms that unify and decrease the local contact pressures and temperatures, and have the largest surface coverage that reduces the wear and contact resistance, which in turn reduces the contact instabilities and so the friction.

Jezik:Angleški jezik
Ključne besede:electrical contacts, copper, graphite, friction, wear, electrical current
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2018
Št. strani:Str. 192-205
Številčenje:Vol. 126
UDK:539.92:621.8(045)
ISSN pri članku:0301-679X
DOI:10.1016/j.triboint.2018.05.024 Povezava se odpre v novem oknu
COBISS.SI-ID:16085531 Povezava se odpre v novem oknu
Število ogledov:891
Število prenosov:121
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Gradivo je del revije

Naslov:Tribology international
Skrajšan naslov:Tribol. int.
Založnik:Butterworth Scientific Limited
ISSN:0301-679X
COBISS.SI-ID:26558976 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0231
Naslov:Tribologija

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:električni kontakti, baker, grafit, trenje, obraba, električni tok

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