TY - JOUR
T1 - Third-body and dissipation energy in green tribology film
AU - Shi, Shih Chen
AU - Pek, Shia Seng
N1 - Funding Information:
The authors also thank the Center for Micro/Nano Science and Technology and Instrument Center, National Cheng Kung University (NCKU), and Everlight Electronics Co., Ltd. (New Taipei City, Taiwan), for technical support.
Funding Information:
1) MoS2 additive is beneficial for the formation of third-body layer, which is the main factor of improving (2) In thetribology property odissipation energy observation,f the composite. different slopes represent different wear mechanism. The 2) In the dissipation energy observation, different slopes represent different wear mechanism. The lower the slope, more lubricating factors are involved in the wear process. The dissipation energy analysis can be used as a simple method to determine wear mechanisms in the wear system. Author Contributions: S.-C.S. and S.-S.P. conceived and designed the experiments; S.-C.S. and S.-S.P. performed Author Contributions: Shih-Chen Shi and Shia-Seng Pek conceived and designed the experiments; Shih-Chen Shi and Shia-Seng Pek performed the experiments; Shih-Chen Shi and Shia-Seng Pek analyzed the data; Shih-Chen Shi contributed reagents/materials/analysis tools; Shih-Chen Shi and Shia-Seng Pek wrote the paper. Funding: The authors gratefully acknowledge the financial supports for this project from the Ministry of Science Funding: The authors gratefully acknowledge the financial supports for this project from the Ministry of Science and Technology in Taiwan (106-2221-E-006 -092 -MY3).
Publisher Copyright:
© 2019 by the authors.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Green tribology film comprising hydroxypropyl methylcellulose modified with nanoparticles and molybdenum disulfide was prepared by the solvent evaporation method. The nanoparticle additives were Al, Cu, Al2O3, and CuO. The tribological behavior of nanoparticles and MoS2 was investigated using a ball-on-disk tribometer. The surface morphologies and worn surfaces were observed through scanning electron microscopy. The preferred orientation and crystallographic structure of MoS2 and nanoparticles in the composites were studied via X-ray diffraction. Energy-dispersive X-ray spectroscopy was used to analyze the transfer film formed on the counterball. The surface profile, wear depth, wear width, and wear volume were studied by a 3D optical profiler. The synergistic effect of micro-platelet MoS2 and nanoparticles contributed to the excellent wear resistances. It was found that the wear volume of hydroxypropyl methylcellulose (HPMC)/MoS2 composites decreased dramatically when Al, Cu, and CuO were used as fillers, and it decreased slightly with Al2O3. The optimal wear resistance was obtained with 3 wt.% additives. These filled composites had a lower coefficient of friction lower than that of unfilled HPMC/MoS2. The optimal result was observed for the HPMC/MoS2/CuO 3 wt.% composite coating, which reduces the wear and friction coefficient by 90% and 84%, respectively, as compared to coatings without additives. Nanoparticles existed in the wear track as the third particles improved the load capacity of the composites. The wear mechanism of the composites is discussed in terms of the worn surfaces and the analysis of transfer film with a third-body approach. The dissipation energy theory is used to evaluate the dominant wear mechanism of the system.
AB - Green tribology film comprising hydroxypropyl methylcellulose modified with nanoparticles and molybdenum disulfide was prepared by the solvent evaporation method. The nanoparticle additives were Al, Cu, Al2O3, and CuO. The tribological behavior of nanoparticles and MoS2 was investigated using a ball-on-disk tribometer. The surface morphologies and worn surfaces were observed through scanning electron microscopy. The preferred orientation and crystallographic structure of MoS2 and nanoparticles in the composites were studied via X-ray diffraction. Energy-dispersive X-ray spectroscopy was used to analyze the transfer film formed on the counterball. The surface profile, wear depth, wear width, and wear volume were studied by a 3D optical profiler. The synergistic effect of micro-platelet MoS2 and nanoparticles contributed to the excellent wear resistances. It was found that the wear volume of hydroxypropyl methylcellulose (HPMC)/MoS2 composites decreased dramatically when Al, Cu, and CuO were used as fillers, and it decreased slightly with Al2O3. The optimal wear resistance was obtained with 3 wt.% additives. These filled composites had a lower coefficient of friction lower than that of unfilled HPMC/MoS2. The optimal result was observed for the HPMC/MoS2/CuO 3 wt.% composite coating, which reduces the wear and friction coefficient by 90% and 84%, respectively, as compared to coatings without additives. Nanoparticles existed in the wear track as the third particles improved the load capacity of the composites. The wear mechanism of the composites is discussed in terms of the worn surfaces and the analysis of transfer film with a third-body approach. The dissipation energy theory is used to evaluate the dominant wear mechanism of the system.
UR - http://www.scopus.com/inward/record.url?scp=85072398044&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072398044&partnerID=8YFLogxK
U2 - 10.3390/app9183787
DO - 10.3390/app9183787
M3 - Article
AN - SCOPUS:85072398044
VL - 9
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
SN - 2076-3417
IS - 18
M1 - 3787
ER -