Microscale Hardness of Acidic Electroless Ni-P/Ni-P-SiC Nano Composite Depositions

  • Munna Ram Department of Physics, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, India
  • Moh. Abdul Aleem Ansari Department of Physics, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, India
  • Sulaxna Sharma Department of Chemistry,THDC Institute of Hydropower Engineering and Technology, Tehri, Uttarakhand
  • Vipin Choudhary Department of Physics, Gurukul Kangri University, Haridwar, India
  • Awanish Kumar Sharma Department of Physics, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, India
Keywords: Coatings, Electroless, Ni-P-SIC, SEM, EDAX, Hardness

Abstract

The ELNi-P along with Ni-P-SiCnano-composite coatings were plated on mild steel (AISI1040) substrates effectively. The ultrafine SiC particles with nano-size range of 50-70 nm as second phase particles were co-incerted into an acidic electroless Ni-P bath. The SiC nano-particles of 4 gpl concentration were used for co-deposition into an EL Ni-P bath. The sodium hypophosphite particularly is selected as a reducerin chemical reactions.After two hours completion of platings, the as-coated EL Ni-P/Ni-P-SiC platings were heat treated at 400°C in argon(Ar) environment for lone one hour period. As coating time increases thickness of coating also increases. The thickness of coating for all samples is found in between of range 20 to 25 micrometer. Further the micro-structure along withmicro-hardness of as-deposited and heated coupons and were investigated for surface morphology by FESEM and EDAX respectively.The randomly dispersal of SiC nano-particles into the EL Ni-P-matrix is shown for 4gpl by micro-structural results. Insertion of ultrafine SiC particles into Ni-P matrix, it appears that size of Ni/Ni-P grainthroughout plating process reduced and introverted the grain growth for the period of the heat treatment. The micro-hardness at HV30 scale was improved significantly by adding up of especially SiC nano-particles into acidic Ni-P electroless bath after heated at 400°C for time of one hour. The increment in hardness of Ni-P-SiCnano-composite coatings against Ni-P coating is explained.

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References

Agarwala, R. C.(1987). Structural studies and crystallization behaviour of electrolessNi-P films. Ph.D. Thesis, University of Roorkee, Roorkee (India).

Agarwala,R.C.,&Agarwala,V. (2003). Electroless alloy/composite coatings: A Review. Sadhana, 28(3-4), 475-493.

Apachitei, I., Tichelaar, F. D., Duszczyk, J., & Katgerman, L. (2002). The effect of heat treatment on the structure and abrasive wear resistance of autocatalytic NiP and NiP–SiC coatings.Surface and Coatings Technology,149(2-3), 263-278.

Balaraju, J. N., Anandan, C., & Rajam, K. S. (2005). Morphological study of ternary Ni–Cu–P alloys by atomic force microscopy. Applied Surface Science,250(1-4), 88-97.

Brenner, A., & Riddell, G. (1946). Nickel plating on steel chemical reduction. U. S. Department of Commerce National Bureau of Standards, 37, 31.

Brenner, A., & Riddell, G. (1947). Nickel plating on steel by chemical reduction. U. S. Department of Commerce National Bureau of Standards, 39(5), 385.

Datta, P.K., Bedingfield, P.B., Lewis, D.B., & Wells, P.B. (1991). Structure and phase changes accompanying treatment of electroless Ni–B alloy coating. Conference Proceeding 2nd International Electroless Nickel Conference Solihull, 139–153.

Mallory, G.O., & Hajdu, J.B.(1990). Electroless plating: fundamentals and applications.American Electroplaters and Surface Finishers Society, Orlando, Florida, (Eds.) 269.

Huang, Y.S., Zeng, X.T., Hu,X.F., & Liu, F.M. (2004). Corrosion resistance properties of electroless nickel composite coatings. Electrochem. Acta, 49(25), 4313–4319.

Jiaqiang, G., Lei, L., Yating, W., Bin, S., & Wenbin, H.(2006). Electroless Ni-P-SiC composite coatings with superfine particles. Surf. Coat. Technol, 200(20-21), 5836–5842.

Sharma, S., Saini, C. K., & Sharma, S. (2014). To develop the electroless NiP-ZnO coating on glass substrate by electroless. Technique Journal of Materials and Environmental Science,5(5), 1667-1670.

Srivastava,A., Mohan,S., Agarwala, V., & Agarwala, R.C.(1992). Factors influencing the deposition rate of Ni-B electroless films.Zeitschrift fur Metallkunde.83(4),251-253.

Sudagar, J.,Lian, J., &Sha, W. (2013). Electroless nickel, alloy, composite and nano coatings–A critical review. Journal of Alloys and Compounds 571,183-204.

Wang, S. C., & Wei, W. C. J. (2003). Characterization of electroplated Ni/SiC and Ni/Al2O3 composite coatings bearing nanoparticles.Journal of Materials Research,18(7), 1566-1574.

Published
2020-09-15
Section
Articles