Journal ArticleDOI
Preparation and Characterization of Electroless Ni-P and Ni-P-Si3N4 Composite Coatings
J.N. Balaraju,S.K. Seshadri +1 more
Reads0
Chats0
TLDR
In this paper, the study of electroless Ni-P and NiP-Si3N4 composite coatings is presented, which are obtained from a proprietary high phosphorus electroless nickel plating bath, comprising nickel sulphate, sodium hypophosphite, complexing agents and stabilizers.Abstract:
SUMMARYThe 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 deposit is obtained at a concentration of 10 g/l in the bath. The electroless Ni-P deposits having 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.read more
Citations
More filters
References
More filters
Book
Electroless plating : fundamentals and applications
Glenn O. Mallory,Juan B. Hajdu +1 more
TL;DR: The Electroless Plating: Fundamentals and Applications (ESPA) as discussed by the authors is a comprehensive text that covers both fundamental and applied aspects of electroless deposition, and was first introduced at SUR/FIN '91.
Journal ArticleDOI
Structure of Chemically Deposited Nickel
TL;DR: In this article, an analysis of the Ni deposit produced by the catalytic Ni reduction process was made and X-ray and electron diffraction revealed that Ni deposit was an amorphous solid.
Journal ArticleDOI
Structural changes induced by heating in electroless nickel-phosphorus alloys
TL;DR: In this paper, the structural changes induced by heating were studied in electroless nickel-phosphorus alloy coatings at three phosphorus compositions: 1%−3, 6.5%−8% and 10.5%-11% (by weight).
Journal ArticleDOI
Electroless Nickel-PTFE Composite Coatings
TL;DR: The scope of electroless nickel has been increased by codepositing materials such as silicon carbides, ceramics, diamonds and fluoropolymers as mentioned in this paper, which is achieved by taking advantage of different but complementary materials.
Journal Article
The performance of electroless nickel/PTFE composites
TL;DR: Proprietes tubologiques et de resistance a la corrosion des revetements composites composites nickel/PTFE as mentioned in this paper have shown that they can resist corrosion.