Investigation the Effects of Layer Structure on the Tribological Behaviour of PAI Overlays Containing MoS2

Subject Areas :

Takayuki Doi ¹ , Kazuki Enomoto ² , Muhammad Nor Sharudin ³

1 - Division of Materials Science and Engineering, Graduate School of Meijo University, Aichi, Japan
2 - Department of Materials Science and Engineering, Meijo University, Aichi, Japan
3 - Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka, Melaka, Malaysia

Received: 2021-09-28 Accepted : 2021-11-25 Published : 2021-11-01

Keywords: Composite, OVERLAY, solid lubricant, MoS2, Tribology,

Abstract :

There is demand for the reduction of friction loss under poor lubricating conditions, for higher contact pressure, and a longer lifetime in internal combustion engines. Overlay technology is one of the effective means for reducing friction loss and improving seizure resistance of journal bearings. The present study describes the fundamental tribological behavior under boundary lubrication of a polyamide-imide (PAI) overlay containing molybdenum disulfide (MoS2) powder. Specimens with different layer structures for the overlay were prepared, and the effects of the layer structure of the overlays were investigated experimentally. As result, the MoS2 in the surface overlay layers became highly aligned through a high-speed spin coating process. In the case of the overlays containing MoS2, the coefficient of friction became almost constantly with a gradual increase, and this was in contrast to the case of the overlays without MoS2.

References:

[1] Kumada, Y., Hashizume, K. and Kimura, Y. 1998. Performance of Plain Bearings with Circumferential Microgrooves. Japanese Society of Tribologists. 43: 456-461. 

[2] Sonobe, H. 2011. Trend of Plain Bearing Overlays for Diesel Engines, Journal of Japan Institute of Marine Engineering. 46(16):1-10.

[3] Horiba, Y., Kobayashi, S., Akita, H. and Usami, H. 2013. Friction properties of MoS₂ penetrated aluminum alloy. Proceedings of JAST Tribology Conference.

[4] Ishihara, J. Enomoto, K. and Usami, H. 2015. Tribological properties of polymer overlay coated on the microtextured metal substrate. Proceedings of Malaysian International Tribology Conference.

[5] Qin,  X.,  Ke ,  P.,  Wang,  A., and  Kim,  K. H. 2013. Microstructure, Mechanical and Tribological Behaviors of MoS₂-Ti Composite Coatings Deposited by a Hybrid HIPIMS Method. Surface and Coatings Technology. 228 (9):275-281.

[6] Renevier,  N. M.,  Fox,  V. C.,  Teer,  D. G., and  Hampshire,  J. 2000. Coating Characteristics and Tribological Properties of Sputter-Deposited MoS₂/Metal Composite Coatings Deposited by Closed Field Unbalanced Magnetron Sputter Ion Plating. Surface and Coatings Technology. 127(1): 24-37. 

[7] Bülbül,  F.,  Efeoğlu,  İ., and  Arslan,  E.,  2007. The Effect of Bias Voltage and Working Pressure on S/Mo Ratio at MoS₂-Ti Composite Films. Applied Surface Science. 253(9): 4415-4419.

[8] Zhang,  Y.,  Shockley,  J. M.,  Vo,  P. and  Chromik,  R. R. 2016. Tribological Behavior of a Cold-Sprayed Cu- MoS₂ Composite Coating During Dry Sliding Wear. Tribology Letters. 62(1): Article number: 9.

[9] Liu,  L.,  Huang,  Z. B.,  Peng,  Y. T. and  Huang,  P.  2017. Enhanced Lubrication and Photo-Catalytic Degradation of Liquid Paraffin by Coral-like MoS₂. New Journal of Chemistry. 41(15): 7674-7680.

[10] Cai ,  S.,  Guo,  P.,  Liu,  J. Z.,  Zhang,  D.,  Ke,  P. L.,  Wang,  A. Y., and  Zhu,  Y. J.  2017. Friction and Wear Mechanism of MoS₂/C Composite Coatings Under Atmospheric Environment. Tribology Letters. 65(3). Article number: 79 .

[11] Chen, B. Li, X., Jia, Y.,  Li, X. Yang, J., Yan, F. and Li, C. 2018. MoS₂ nanosheets-decorated carbon fiber hybrid for improving the friction and wear properties of polyimide composite. Composites Part A: Applied Science and Manufacturing. 109: 232-238.

[12] Meng, F. M.,  Cui, Z. T.,  Cheng, Z. T., and  Han, H. L. 2018. Experimental Study on Tribological Properties of Graphite-MoS₂ Coating on GCr15.  Journal of  Tribology. 140(5): 051303.