Journal ArticleDOI
Preparation and Characterization of Electroless Ni-P and Ni-P-Si3N4 Composite Coatings
J.N. Balaraju,S.K. Seshadri +1 more
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
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Journal ArticleDOI
Electroless nickel, alloy, composite and nano coatings – A critical review
J. Sudagar,Jianshe Lian,Wei Sha +2 more
TL;DR: The development of metal deposition processes based on electroless nickel, alloy and composite coatings on various surfaces has witnessed a surge in interest among researchers, with many recent applications made possible from many excellent properties as mentioned in this paper.
Journal ArticleDOI
Influence of particle size on the microstructure, hardness and corrosion resistance of electroless Ni–P–Al2O3 composite coatings
TL;DR: In this paper, high phosphorus electroless nickel bath has been used to prepare composite coatings containing alumina powders (50 nm, 0.3 μm and 1.0 μm).
Journal ArticleDOI
The friction and wear of electroless Ni–P matrix with PTFE and/or SiC particles composite
TL;DR: In this paper, the friction behavior and wear mechanism of Ni-P matrix composites with PTFE and/or SiC particles composite coating are investigated by virtue of ring-on-disk wear machine at a high load of 150 N.
Patent
Electroless coated disks for high temperature applications and methods of making the same
Alan J. Ruffini,Lindsey A. Hamilton,Dorothea Buechel-Rimmel,Jean M. Laplante,Ambrose Schaffer,Frederick K. Lowes +5 more
TL;DR: In this paper, a disk for a hard disk drive is described, which consists of a substrate comprising aluminum and a coating layer disposed over the substrate, and the coating layer comprises an alloy of Ni, X 1 and X 2, wherein X 1 comprises one or more elements selected from the group consisting of Ag, Au, B, Cr, Cu, Ga, In, Mn, Mo, Nb, Pb, Sb, Se, Sn, Te, W, Zn and Zr.
Journal ArticleDOI
The tribological behaviour of electroless Ni–P–Gr–SiC composite
TL;DR: In this article, the tribological behavior and wear mechanism of Ni-P-Gr (graphite)-SiC (manufactured by electroless plating) was surveyed using scanning electron microscopy (SEM) and energy-dispersive analysis of X-ray (EDAX).
References
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Book
Introduction to fine ceramics : applications in engineering
昇 一ノ瀬,慶蔵 久武,Charles G. Aschmann +2 more
TL;DR: In this article, the authors present a survey of the fundamental principles of ceramics, including structural, electronic, and glass and optical fibers, and the New Technology of Ceramics: Questions and Answers Index.
Journal ArticleDOI
Chemically Deposited Composites—A New Generation of Electroless Coatings
TL;DR: In this paper, a new family of composite coatings utilises electroless plating processes to codeposit various non-metallic particles in metal matrices, and the resulting composites demonstrate excellent resistance to...
Journal ArticleDOI
Electroless Composite Coatings for Wear Resistant Applications
TL;DR: In this paper, a commercial electroless nickel solution containing 10 g/l chromium carbide of particle size 2-9 μm was used to produce a composite with a hardness of 1225 HV.
Journal Article
The properties of electrodeposited Ni-P-SiC composite coatings
TL;DR: Morphologie, durete et resistance a l'usure des revetements electrodeposes Ni, Ni-SiC, Ni P SiC and Ni-P SiC as mentioned in this paper.
Journal ArticleDOI
Effect of Cationic Surfactant on Deposition Behaviour in Electroless Ni-P-PTFE Composite Plating
TL;DR: In this paper, the effects of the presence of cationic surfactants on the deposition behavior of electrolessly deposited composite films were described. But the effect of the surfactant type on the zeta potential of the particle surface in the plating solutions and the content of the particles in the films both depend upon the surfactor type.