Electroless Deposition of Ni-P/nanoPTFE Composite Coating and Investigation of Its Properties

Authors

Abstract

In this study, properties of Ni-P/nano PTFE coating deposited on aluminum substrate using commercial electroless nickel bath were studied.To carry out the research, micro hardness, thickness, roughness and morphological properties of the coating due to different PTFE solution densities and temperatures were studied. Effects of heat treatment on micro hardness and morphology of the obtained coating was investigated also. Vickers micro hardness and Rz and Ra parameters were measured for hardness and roughness, respectively.Particle distribution and chemical composition of the nanocomposite coatings were evaluated using SEM/EDS and XRD techniques. results showed that presence of nanoPTFE particles in the solution decreased the micro hardness ofNi-P from 520 HV to 250 HV and increased the roughness (Rz) from 1.49 to 4.6µm by changing the PTFE content from 2 to 14 g/l. Increasing the solution temperature from 75 to 90°C leaded to increase the hardness from 125 to 210 HV.Also it was found that heat treatment at 300°C for 4h increased the coatinghardness to 375 HV because of formationof Ni3P phases.

Keywords


- سعید عظیمی ابرقوئی، احمد ساعتچی و رضا ابراهیمی کهریزسنگی، "استفاده از روشی نوین جهت بررسی خوردگی موضعی آلیاژهای آلومینیوم 2024، 7075 و 6061 در محیط های شبه اتمسفر دریایی"، نشریه مواد نوین، دوره4، شماره 13، صفحه 69-82، پاییز 1392.
2- R. Tenno, “Electroless Nickel Plating”, Finishing Publications LTD, Stevenage, Hertfordshire, England, 1991.
3- W. Riedel, “Electroless Nickel Plating”, ASM International, Metals Park, Ohio, USA, 1991.
4-M. Ratzker, D. S. Lashmore, K. W. Pratt, “Plating Surface Finish”, pp. 73-74, 1986.
5-S. Alirezaei, S. M. Monirvaghefi, M. Salehi, A. Saatchi, “Wear Behavior of Ni–P and Ni–P–Al2O3Electroless Coatings”, Wear, Vol. 262, pp. 978-980, 2007.
6-S. M. Moonir-vaghefi, A. Saatchi, “Tribologicalbehaviour of electroless Ni–P–MoS2”, Metallkd, Vol. 88, pp. 498–501, 1997.
7-Y. Wu, L. Lei, B. Shen and W. Hu. “Investigation in Electroless Ni–P–Cg (graphite)–SiC Composite Coating”, Surface & Coatings Technology, Vol. 201, pp. 441-445, 2006.
8-Y. Wu, H. Liu, B. Shen, L. Liu and W. Hu, “The Friction and Wear of Electroless Ni–P Matrix with PTFE and/or SiC particles composite”, Tribology International, Vol. 39, pp. 553-559, 2006.
9-Y. Wu, B. Shen, L. Liu and W. Hu, “The Tribological Behaviour of Electroless Ni–P–Gr–SiC Composite”, Wear, Vol. 261, pp. 201–207, 2006.
10-O. A. Leo´n, M. H. Staia and H. E. Hinterman, “Wear Mechanism of Ni–P–BN (h)  Composite Autocatalytic Coatings”, Surface & Coatings Technology, Vol. 200 pp. 1825 – 1829, 2005.
11- Z. Abdel Hamid, S. A. El Badry and A. Abdel Aal, “Electroless Deposition and Characterization of Ni–P–WC Composite Alloys”, Surface & Coatings Technology, Vol 201, pp. 5948–5953, 2007.
12-S. M. Moonir-vaghefi, A. Saatchi and J. Hejazi, “The Effect of Agitation on Electroless Nickel-Phosphorus-Molybdenum Disulfide Composite Plating”, Metal Finishing, Vol 95, pp. 102-106, 1997.
13-S. M. Moonir-Vaghefi and A. Saatchi, "Deposition and Properties of ElectrolessNickel‌Phosphorus-Molybdenum Disulfide Composites", Metal Finishing, Vol 95, pp. 46-52, 1997.
14-E. Pena-Munoz, P. Bercot, A. Grosjean, M. Rezrazi and J. Pagetti, "Electrolytic and electroless coatings of Ni-PTFE composites Study of some characteristics", Surface and Coatings Technology, , Vol. 107, pp. 85-93, 1998.
15-Y. S. Huang, X. T. Zeng, I. Annergren and F. M. Liu, "Development of Electroless Ni-P-PTFE-SiC Composite Coating", Surface and Coatings Technology, Vol. 167, pp. 207-211, 2003.
16-M. D. Ger, K. H. Hou, B. J. Hwanh, "Transient Phenomena of the Codeposition of PTFE with Electroless Ni-P Coating at the Early Stage", Material Chemistry & Physics, Vol. 87, pp.102-108, 2004.
17-J. Colaruotolo and D. Tramontana, “Engineering Applications of Electroless Nickel”, American Electroplaters Society, pp. 207-220, 1968.
18-Q.zhao, Y.Lio and H.Muller, “Graded Ni-ptfe coating and their Protential application”, Surface and Coating Technology, Vol. 155, pp. 279-284, 2002.
19-G.O. Mallory and J.B. Hajdu, Electroless Plating: Fundamentals and Applications, AESF, Orlando, pp. 189-190, 1991.
20-D. Gutsev, M. Antonov, I. Hussainova and A.Ya. Grigoriev, “Effect of SiO2 and PTFE additives on dry sliding of NiPelectroless Coating”, Tribology International, vol. 65, pp. 295–302, 2013.
21-F. Wang, S. Arai and M. Endo, “Electrochemical Preparation and Characterization of Nickel/Ultra-Dispersed PTFE Composite Films from Aqueous Solution”, Materials Transactions, Vol. 45, pp. 1311-1316, 2004.
22-M. D. Ger and B. J. Hwang, “Effect of Surfactants on Codeposition of PTFE Particles with Electroless Ni-P Coating”, Materials Chemistry and Physics, Vol. 76, pp. 38–45, 2002.
23-K.W. Liew, S.Y. Chia, C.K. Kok and K.O. Low, “Evaluation on Tribological Design Coatings of Al2O3 , Ni–P–PTFE and MoS2 on Aluminium Alloy 7075 Under Oil Lubrication”, Materials and Design, vol. 48, pp. 77–84, 2013.
24-Y. Z. Zhang, Y. Y. Wu, K. N. Sun and M. Yao, “Characterization of Electroless Ni-P-PTFE Composite Deposits”, Journal Of Materials Science Letters, vol. 17, pp.119-122, 1998.