Tribological and Morphological Evaluation of Ni-P and Ni-P/D Coatings

Abstract:

The tribological characteristics of Electroless Ni-P and Ni-P/D (diamond) coatings were studied and analysed against AISI 52100 steel ball under dry reciprocating sliding conditions. Low and High Phosphorus Ni-P alloy coatings were deposited on steel substrate by Electroless deposition technique. Diamond particles were successfully reinforced into Ni-P matrix to produce Ni-P/D composite coatings. All coatings were subjected to heat treatment at 400^°. The micro-hardness, surface features and elemental composition of the coatings was analysed. The surface morphology of Ni-P and Ni-P/D coatings is detailed. Presence of dia mond particles in Ni-P matrix was confirmed by EDS analysis. Dry sliding wear tests showed a significant enhancement in wear resistance of Ni-P/D composite coatings compared to Ni-P coatings. Experimental results indicate that combined effect of diamond particles reinforcement and heat treatment play a crucial role in modifying the surface characteristics and tribological performance of the Ni-P coatings.

• Periodical: Materials Science Forum (Volume 969)
• Pages: 73-79
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.969.73
• Online since: August 2019
• Authors: Bijoy Ramakrishnan, K. Uday Venkat Kiran, Pranit Rangari, Anuj Prajapati, Zuveria Firdouz, Tathwika Jugunta, B. Uday Kumar, Ajeet Srivastav, B. Ratna Sunil, Ravikumar Dumpala*
• Keywords: Diamond, Electroless Coating, Friction Coefficient, Heat Treatment, Wear

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