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Coatings 2019, 9(2), 116; https://doi.org/10.3390/coatings9020116

Surfactant-Free Electroless Codeposition of Ni–P–MoS2/Al2O3 Composite Coatings

1
Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
3
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education/High-tech Key Laboratory of Agricultural Equipment & Intelligentization of Jiangsu Province, Jiangsu University, Zhenjiang 212013, China
4
Jiangsu Key Laboratory of Advanced Manufacturing Technology, Huaiyin Institute of Technology, Nanjing 223003, China
5
Faculty of Engineering and Environment, University of Southampton, Southampton SO17 1BJ, UK
6
Production Engineering, Machine Design and Automation, Department of Mechanical Engineering, Katholieke Universiteit Leuven (KU Leuven), Leuven 3001, Belgium
*
Author to whom correspondence should be addressed.
Received: 20 December 2018 / Revised: 1 February 2019 / Accepted: 10 February 2019 / Published: 13 February 2019
(This article belongs to the Special Issue Superhydrophobic Coatings for Corrosion and Tribology)
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Abstract

This paper presents the influence of an inorganic Al2O3 layer over MoS2 particles on the tribological performance of electroless Ni–P–MoS2/Al2O3 composite coatings fabricated without using surfactants. The Al2O3-coated MoS2 particles were prepared by a heterogeneous nucleation process. The dry sliding tests of the composite coatings were tested against a WC ball. SEM was used to observe the surface morphology of particles, composite coatings, and worn surfaces. The results indicate that the coverage of an Al2O3 coating on MoS2 particles significantly affects the surface morphology, frictional coefficient and wear loss of the composite coatings. The incorporation of Al2O3-coated MoS2 particles with lower coverage (up to 7% of Al2O3) could obtain compact surface structure of composite coatings, which contribute to reduced wear loss. However, higher coverage would lead to loose surface structure of the composite coatings, and thus increase their wear loss. View Full-Text
Keywords: electroless composite coating; Al2O3-coated particles; MoS2 particles; wear resistance; surfactant electroless composite coating; Al2O3-coated particles; MoS2 particles; wear resistance; surfactant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Liu, P.; Zhu, Y.; Shen, Q.; Jin, M.; Zhong, G.; Hou, Z.; Zhao, X.; Wang, S.; Yang, S. Surfactant-Free Electroless Codeposition of Ni–P–MoS2/Al2O3 Composite Coatings. Coatings 2019, 9, 116.

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