2024-03-29T10:48:37Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02002097
2023-10-10T04:56:54Z
320:321:322
In situ observation of the formation of MoDTC-derived tribofilm on a ta-C coating using reflectance spectroscopy and its effects on friction
Hashizume, Naoya
Murashima, Motoyuki
Umehara, Noritsugu
Tokoroyama, Takayuki
Lee, Woo-Young
open access
© 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
We clarify the relationships between tribofilm thickness, chemical composition, and friction coefficient by combining in situ and ex situ analyses. An in situ reflectance observation is conducted for MoDTC-derived tribofilm on a ta-C coating during friction tests. The results show that the thicker the tribofilm is, the lower the friction coefficient. In addition, the refractive index increases as friction decreases. XPS analysis shows that the topmost surface of the thick tribofilm contains a higher MoS2 concentration than the deep position. Therefore, the generated MoS2-rich tribofilm is considered to reduce friction. In addition, as the MoS2 tribofilm wears out, friction increases. In conclusion, we have developed a MoDTC-derived tribofilm formation model using a new method of in situ optical measurement.
Elsevier
2023-10-01
2021-10
eng
journal article
AM
http://hdl.handle.net/2237/0002002097
https://nagoya.repo.nii.ac.jp/records/2002097
https://doi.org/10.1016/j.triboint.2021.107128
0301-679X
Tribology International
162
107128
https://nagoya.repo.nii.ac.jp/record/2002097/files/Hashizume_repository.pdf
application/pdf
2.2 MB
2023-10-01