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Tribological investigation of silicon-modified DLC coatings for the dry forming of aluminum alloys

Abraham, Tim ; Bräuer, Günter ; Kretz, Felix ; Groche, Peter :
Tribological investigation of silicon-modified DLC coatings for the dry forming of aluminum alloys.
In: 12th International Conference THe "A" Coatings 2016, Hannover.
[Konferenz- oder Workshop-Beitrag], (2016)

Kurzbeschreibung (Abstract)

Diamond-like carbon (DLC) coatings are known to reduce friction and wear. In a dry contact with steel, the tribological behavior can be further optimized by adding a certain concentration of silicon to the amorphous hydrogenated carbon coatings structure (a-C:H:Si). However, in a dry contact with aluminum, the tribological performance of a-C:H:Si coatings and the optimal silicon concentration is still unknown. In order to define an optimum regarding the silicon concentration, a-C:H:Si-coatings with different silicon contents were deposited on 1.2379 tool material by plasma-assisted chemical vapor deposition (PACVD) technology. Tribometer tests were used to analyze the friction and adhesive wear behavior against EN AW 5083 aluminum. Additionally, strip drawing tests were conducted to investigate the efficiency of the different silicon contents with a higher proximity to industrial processes. The tests showed a deteriorating friction behaviour of the a-C:H:Si coatings with an increase of the silicon concentration. Superposing wear mechanisms between the silicon and the aluminum were determined by a subsequent investigation of the wear tracks as an explanation for the tribological behaviour.

Typ des Eintrags: Konferenz- oder Workshop-Beitrag (Keine Angabe)
Erschienen: 2016
Autor(en): Abraham, Tim ; Bräuer, Günter ; Kretz, Felix ; Groche, Peter
Titel: Tribological investigation of silicon-modified DLC coatings for the dry forming of aluminum alloys
Sprache: Englisch
Kurzbeschreibung (Abstract):

Diamond-like carbon (DLC) coatings are known to reduce friction and wear. In a dry contact with steel, the tribological behavior can be further optimized by adding a certain concentration of silicon to the amorphous hydrogenated carbon coatings structure (a-C:H:Si). However, in a dry contact with aluminum, the tribological performance of a-C:H:Si coatings and the optimal silicon concentration is still unknown. In order to define an optimum regarding the silicon concentration, a-C:H:Si-coatings with different silicon contents were deposited on 1.2379 tool material by plasma-assisted chemical vapor deposition (PACVD) technology. Tribometer tests were used to analyze the friction and adhesive wear behavior against EN AW 5083 aluminum. Additionally, strip drawing tests were conducted to investigate the efficiency of the different silicon contents with a higher proximity to industrial processes. The tests showed a deteriorating friction behaviour of the a-C:H:Si coatings with an increase of the silicon concentration. Superposing wear mechanisms between the silicon and the aluminum were determined by a subsequent investigation of the wear tracks as an explanation for the tribological behaviour.

Band: 3
Freie Schlagworte: Coatings, DLC, aluminum, wear, friction, dry forming
Fachbereich(e)/-gebiet(e): Fachbereich Maschinenbau
Fachbereich Maschinenbau > Produktionstechnik und Umformmaschinen
Veranstaltungstitel: 12th International Conference THe "A" Coatings 2016
Veranstaltungsort: Hannover
Hinterlegungsdatum: 14 Apr 2016 08:21
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