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Effect of the slide-to-roll ratio and the contact kinematics on the elastohydrodynamic friction in diamond-like-carbon contacts with different wetting behaviours
ID
Polajnar, Marko
(
Avtor
),
ID
Kalin, Mitjan
(
Avtor
)
PDF - Predstavitvena datoteka,
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(1,22 MB)
MD5: 6ADAE8FCBC3CAD84897F59FDD2C2BE95
URL - Izvorni URL, za dostop obiščite
https://link.springer.com/article/10.1007%2Fs11249-015-0593-3
Galerija slik
Izvleček
In this paper, we show how the slide-to-roll ratio (SRR), the contact kinematics and the surface energy all have important effects on the elastohydrodynamic friction. As reported previously, diamond-like-carbon (DLC) contacts of the type DLC/DLC provide the lowest coefficient of friction, in particular those DLC materials with the lowest surface energies (three different DLC coatings were used in this study). A friction reduction of up to 48 %, compared to a steel/steel contact, was obtained. A surprising new finding from this investigation is that the friction in DLC contacts is significantly reduced for high SRRs, i.e. a difference of up to 27 % was measured in the DLC/DLC contacts when the SRR increased from 0.5 (rolling prevails) to 1.8 (sliding prevails). However, even more surprising is the effect of the SRR on the friction in mixed steel/DLC contacts, which is related to the contact design and its kinematics. We found that if the DLC is coated on the slower surface, a high SRR will not reduce the friction to any significant extent, typically about 5 %, and at most 13 %, compared to steel/steel contacts. However, a significant friction reduction is observed when applying a low-surface-energy DLC coating to the faster surface-on average about 20 % and as high as 33 %. In this case (a high SRR and DLC on the faster surface), mixed steel/DLC surfaces can experience a very similar friction as that seen for DLC/DLC contacts. Qualitatively, the same behaviour was found for both positive and negative SRR values.
Jezik:
Angleški jezik
Ključne besede:
EHD lubrication
,
DLC
,
surface energy
,
wetting
,
slide-to-roll ratio
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Recenzirani rokopis
Leto izida:
2015
Št. strani:
Str. 1-10
Številčenje:
Vol. 60, iss. 1
PID:
20.500.12556/RUL-106740
UDK:
539.92(045)
ISSN pri članku:
1023-8883
DOI:
10.1007/s11249-015-0593-3
COBISS.SI-ID:
14197019
Datum objave v RUL:
14.03.2019
Število ogledov:
1365
Število prenosov:
789
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Objavi na:
Gradivo je del revije
Naslov:
Tribology letters
Skrajšan naslov:
Tribol. lett.
Založnik:
Baltzer, Baltzer Science Publishers
ISSN:
1023-8883
COBISS.SI-ID:
2806555
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
tribologija
,
mazanje
,
DLC prevleke
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0231
Naslov:
Tribologija
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