Abstract
Composite coating techniques are becoming increasingly popular owing to their peculiar performances. In this study, the wear resistance of thermally sprayed Ni-MoS2 composite coatings on an AISI 1020 steel substrate was investigated. Ni-MoS2 composite powder (size: 60-90 μm) containing 25 wt.% of dispersed MoS2 was prepared by electroless plating. Ni-MoS2 composite coatings were then prepared by HVOF thermal spraying. The coatings were characterized by structural, surface morphological, and compositional analyses by means of microhardness tests, SEM/EDS, XRD, and ICP-AES. For the evaluation of their anti-wear properties, the composites were subjected to ball-on-disk dry wear tests based on the ASTM G99 standard at room temperature. Experimental results showed that some of the MoS2 content dispersed in the Ni-based composite coating burnt away during the high-temperature spraying process, thereby reducing the MoS2 concentration in the coating. In the wear test, the weight loss in the Ni-MoS2 composite coating was minimal under a low load (<15 N) but increased rapidly with increasing load (>30 N). The average wear rate of the coatings was found to be ~1/40 times that of a Ni coating, showing that the wear resistance of the composite coatings was significantly improved by MoS2 addition.
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References
S. Shawki and Z.A. Hamid, Deposition of High Wear Resistance of Ni-Composite Coatings, Aircr. Eng. Aerosp. Technol., 1997, 69(5), p 432-439
M.F. Cardinala, P.A. Castroa, J. Baxic, H. Liangc, and F.J. Williams, Characterization and Frictional Behavior of Nanostructured Ni-W-MoS2 Composite Coatings, Surf. Coat. Technol., 2009, 204(1-2), p 85-90
X. Zhang, X. Zhang, A. Wang, and Z. Huang, Microstructure and Properties of HVOF Sprayed Ni-based Submicron WS2/CaF2 Self-lubricating Composite Coating, Trans. Nonferrous Met. Soc. China, 2009, 19(1), p 70-85
X.J. Liu, B.C. Xu, S.I. Ma, and Z.G. Chen, Wear, 1997, 211, p 151-155
P. Jokinen, K. Korpiola, and A. Mahiout, J. Therm. Spray Technol., 2002, 9, p 241-244
J.H. Ahn, B.C. Hwang, and S.H. Lee, J. Therm. Spray Technol., 2005, 14, p 251-257
B. Wielage, J. Wilden, T. Schnick, A. Wank, J. Beczkowiak, R. Schülein, H. Zoz, and H. Ren, Mechanically Alloyed SiC Composite Powders for HVOF Applications, Proc. Int. Therm. Spraying Conf., E. Lugscheider and C.C. Berndt, Ed., March 4-6, 2002 (Essen, Germany), DVS Verlag, 2002, p 1047-1051
J.B. Zhou and K.P. Rao, J. Alloys Compd., 2004, 384, p 125-130
B.S. Xu, Z.X. Zhu, S.N. Ma, W. Zhang, and W.M. Liu, Wear, 2004, 257, p 1089-1095
N. Sakoda, M. Hida, Y. Takemoto, A. Sakakibara, and T. Tajiri, J. Jpn. Inst. Met., 2002, 66, p 1304-1310
T. Sato, A. Nezu, and T. Watanabe, Trans. Mater. Res. Soc. Jpn., 2000, 25, p 302
R. Goswami, S. Sampath, H. Herman, and J.B. Parise, J. Mater. Res., 2000, 14, p 25-28
R. Goswami, S. Sampath, H. Herman, and J.B. Parise, J. Mater. Res., 1999, 14, p 3489-3492
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This study was supported by a National Science Council grant for project publication (project number: NSC99-2221-E-008-020-MY2).
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Liu, Y.L., Jeng, M.C., Hwang, J.R. et al. A Study on Wear Resistance of HVOF-Sprayed Ni-MoS2 Self-Lubricating Composite Coatings. J Therm Spray Tech 24, 489–495 (2015). https://doi.org/10.1007/s11666-014-0208-9
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DOI: https://doi.org/10.1007/s11666-014-0208-9