• Jun 16, 2017 News![CFP] 2018 the annual meeting of IJMMM Editorial Board, ECMMM 2017, will be held in Krakow, Poland during February 10-12, 2018.   [Click]
  • Mar 24, 2016 News!Vol.3, No.3 has been indexed by EI(Inspec)!   [Click]
  • Mar 17, 2017 News![CFP] 2017 the annual meeting of IJMMM Editorial Board, ECMMM 2017, will be held in Paris, France during February 15-17, 2017.   [Click]
General Information
    • ISSN: 1793-8198
    • Frequency: Quarterly
    • DOI: 10.18178/IJMMM
    • Editor-in-Chief: Prof. K. M. Gupta, Prof. Ian McAndrew
    • Executive Editor: Ms. Cherry L. Chen
    • Abstracting/Indexing: EI (INSPEC, IET), Chemical Abstracts Services (CAS), Engineering & Technology Digital Library,  ProQuest, Crossref, Ulrich's Periodicals Directory, DOAJ, and Electronic Journals Library .
    • E-mail ijmmm@ejournal.net
Editor-in-chief
Prof. Ian McAndrew
Embry Riddle Aeronautical University, UK.
It is my honor to be the editor-in-chief of IJMMM. I will do my best to help develop this journal better.

IJMMM 2016 Vol.4(2): 106-110 ISSN: 1793-8198
DOI: 10.7763/IJMMM.2016.V4.234

Influence of Nano Al2O3 Particles on the Adhesion, Hardness and Wear Resistance of Electroless NiP Coatings

S. Karthikeyan and L. Vijayaraghavan
Abstract—In this present study electroless NiP coatings and NiP-Al2O3 coatings had been deposited on a mild steel substrate. The surface morphology of both the coatings had studied using scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction technique. Adhesion, hardness and wear behavior were investigated and compared for NiP and NiP-Al2O3 coatings. Optical micrograph images were used for the evaluation of adhesion of coatings which found sufficient and acceptable according to VDI 3198 standard. Hardness of the coating had been evaluated based on depth sensing techniques and substrate effect had avoided by maintaining depth to coating thickness ratio less than 0.1. Due to co-deposition of Al2O3 particles the hardness of NiP coatings increased by 20.5% (7.8 GPa to 9.4 GPa). Dry sliding wear tests were conducted on PLINT TE66 micro scale tester against steel ball of hardness 800 HV. Wear resistance of NiP coatings increased with increase in sliding distance. The co-deposition of Al2O3 particles in NiP matrix arrest the deformation during sliding of steel ball and thus wear resistance of NiP-Al2O3 coatings is superior to NiP coatings. Wear crater morphology were studied using SEM and EDS. Adhesive wear mechanics was observed in NiP coatings and combination of adhesive and abrasive wear mechanism were found in NiP-Al2O3 coatings.

Index Terms—Adhesion, electroless coatings, hardness, wear resistance.

The authors are with Department of Mechanical Engineering, IIT Madras, Chennai, 600036, India (e-mail: kkeyanme@gmail.com, lvijay@iitm.ac.in).

[PDF]

Cite: S. Karthikeyan and L. Vijayaraghavan, "Influence of Nano Al2O3 Particles on the Adhesion, Hardness and Wear Resistance of Electroless NiP Coatings," International Journal of Materials, Mechanics and Manufacturing vol. 4, no. 2, pp. 106-110, 2016.

Copyright © 2008-2015. International Journal of Materials, Mechanics and Manufacturing. All rights reserved.
E-mail: ijmmm@ejournal.net