Header menu link for other important links
X
Preparation and characterization of electroless Ni-P and Ni-P-Si3N4 composite coatings
Suresh Krishnamoorthy Seshadri
Published in Inst of Metal Finishing, Birmingham
1999
Volume: 77
   
Issue: 2
Pages: 84 - 86
Abstract
The present work pertains to the study of electroless Ni-P and Ni-P-Si3N4 composite coatings. The deposits are obtained from a proprietary high phosphorus electroless nickel plating bath, comprising nickel sulphate, sodium hypophosphite, complexing agents and stabilizers. The maximum weight percent of Si3N4 incorporated in the electroless deposits is obtained at a concentration of 10 g/l in the bath. The electroless Ni-P deposits have 0%, 2.01%, 5.81% and 8.10% of Si3N4, respectively, obtained from baths containing 0, 2, 5 and 10 g/l of Si3N4, are characterized by optical microscopy, XRD and TEM. Hardness is found to increase with the incorporation of Si3N4 at all heat treatment temperatures studied. Also hardness increases with an increase in weight percent of Si3N4 incorporated in the deposit. The analyses of the composite coatings by XRD and TEM reveal that the inclusion of Si3N4 particles does not change the amorphous nature of the Ni-P matrix.
About the journal
JournalTransactions of the Institute of Metal Finishing
PublisherInst of Metal Finishing, Birmingham
ISSN00202967
Open AccessNo
Concepts (13)
  •  related image
    Electroless plating
  •  related image
    Hardness
  •  related image
    Heat treatment
  •  related image
    Nickel compounds
  •  related image
    Nickel plating
  •  related image
    Optical microscopy
  •  related image
    Silicon nitride
  •  related image
    Sodium compounds
  •  related image
    Stabilizers (agents)
  •  related image
    Transmission electron microscopy
  •  related image
    X ray diffraction analysis
  •  related image
    Composite coatings
  •  related image
    Protective coatings