Details
| Original language | English |
|---|---|
| Article number | 283 |
| Number of pages | 14 |
| Journal | Lubricants |
| Volume | 11 |
| Issue number | 7 |
| Publication status | Published - 30 Jun 2023 |
Abstract
The increasing global demand for innovative and environmentally friendly lubricants can be met through the use of solid lubricants. By switching from conventional lubricants such as various oils or grease to solid lubricants, new scopes of application can also be opened up. The main requirements for solid lubricants are a reduction in the coefficient of friction (CoF) and an increase in wear resistance. Due to the favourable material properties, molybdenum (Mo) coatings fulfil the tribological requirements and are therefore promising solid lubricants which can be applied via physical vapour deposition (PVD). In this work, the impact of substrate temperature on the hot hardness of deposited Mo coatings was determined. The specimen with the highest hot hardness was then tribologically examined both at the micro and nano level. Through an analysis of the wear tracks by means of nanoindentation and scanning electron microscopy (SEM), it was possible to detect the influence of the tribological load separately from that of the thermal loads. The results showed that the tribological load influenced the Mo coating by significantly increasing its hardness. This was achieved due to the work hardening of the Mo layer leading to an increase in the wear resistance of the coating.
Keywords
- hot hardness, micro-tribology, Mo coatings, nano-tribology, PVD, SEM, solid lubricants, SPM, work hardening
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Surfaces, Coatings and Films
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In: Lubricants, Vol. 11, No. 7, 283, 30.06.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigation of the Hardness Development of Molybdenum Coatings under Thermal and Tribological Loading
AU - Behrens, Bernd-Arno
AU - Stockburger, Eugen
AU - Wester, Hendrik
AU - Poll, Gerhard
AU - Pape, Florian
AU - Konopka, Dennis
AU - Heimes, Norman
N1 - Funding Information: The results presented in this paper were obtained within the scope of the priority program “Fluidless Lubrication Systems with high Mechanical Load” (SPP 2074) in project 2, funded by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG))—407673224. The authors gratefully acknowledge the German Research Foundation for their financial support of this project.
PY - 2023/6/30
Y1 - 2023/6/30
N2 - The increasing global demand for innovative and environmentally friendly lubricants can be met through the use of solid lubricants. By switching from conventional lubricants such as various oils or grease to solid lubricants, new scopes of application can also be opened up. The main requirements for solid lubricants are a reduction in the coefficient of friction (CoF) and an increase in wear resistance. Due to the favourable material properties, molybdenum (Mo) coatings fulfil the tribological requirements and are therefore promising solid lubricants which can be applied via physical vapour deposition (PVD). In this work, the impact of substrate temperature on the hot hardness of deposited Mo coatings was determined. The specimen with the highest hot hardness was then tribologically examined both at the micro and nano level. Through an analysis of the wear tracks by means of nanoindentation and scanning electron microscopy (SEM), it was possible to detect the influence of the tribological load separately from that of the thermal loads. The results showed that the tribological load influenced the Mo coating by significantly increasing its hardness. This was achieved due to the work hardening of the Mo layer leading to an increase in the wear resistance of the coating.
AB - The increasing global demand for innovative and environmentally friendly lubricants can be met through the use of solid lubricants. By switching from conventional lubricants such as various oils or grease to solid lubricants, new scopes of application can also be opened up. The main requirements for solid lubricants are a reduction in the coefficient of friction (CoF) and an increase in wear resistance. Due to the favourable material properties, molybdenum (Mo) coatings fulfil the tribological requirements and are therefore promising solid lubricants which can be applied via physical vapour deposition (PVD). In this work, the impact of substrate temperature on the hot hardness of deposited Mo coatings was determined. The specimen with the highest hot hardness was then tribologically examined both at the micro and nano level. Through an analysis of the wear tracks by means of nanoindentation and scanning electron microscopy (SEM), it was possible to detect the influence of the tribological load separately from that of the thermal loads. The results showed that the tribological load influenced the Mo coating by significantly increasing its hardness. This was achieved due to the work hardening of the Mo layer leading to an increase in the wear resistance of the coating.
KW - hot hardness
KW - micro-tribology
KW - Mo coatings
KW - nano-tribology
KW - PVD
KW - SEM
KW - solid lubricants
KW - SPM
KW - work hardening
UR - http://www.scopus.com/inward/record.url?scp=85166286459&partnerID=8YFLogxK
U2 - 10.3390/lubricants11070283
DO - 10.3390/lubricants11070283
M3 - Article
VL - 11
JO - Lubricants
JF - Lubricants
SN - 2075-4442
IS - 7
M1 - 283
ER -