INVESTIGATION OF ELECTRICAL CHARACTERISTICS OF COMPOSITES PRODUCED BY ELECTROLESS Ni PLATING OF Si3N4

Abstract

The microstructure, dielectric properties and electrical characteristics of Ni plated Si₃N₄ powders were investigated using specimens produced by tube furnace sintering at 800-1200°C temperature. A uniform nickel layer on Si₃N₄ powders was deposited prior to sintering using electroless plating technique. A composite consisting of binary additions, a metallic phase, Ni within a matrix of Ni has been prepared under Ar shroud and then tube furnace sintered. XRD, SEM (Scanning Electron Microscope), Empedans Phase Analyzer were used to obtain structural data and to determine electrical properties such as dielectric and conductivity at the temperature range of 25-400C. The ferromagnetic resonance varied from 10 Hz to 1 GHz and measurements were employed to characterize the properties of the specimens. Experimental results carried out for composition (33Si₃N₄)66Ni at 1200°C suggest that the best properties as 75,81HB and permittivity were obtained at 1200°C

Keywords

• Powder metallurgy, electroless plating, electrical proporties

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