Studies on nickel coated carbon fibres and their composites

摘要: Uniform and continuous coating of nickel was given to the carbon fibres by cementation, electroless or electroplating techniques. The thickness ranged between 0.2 0.6 μm for all three methods used. Coating less than showed discontinuous over fibre surface. Beyond thickness, deposited in den-drite form coating. For continuously coated fibres, ultimate tensile properties were near uncoated suggesting adherent defect free coating; while electrolytic cementation process exhibited lower strength (UTS) properties. fracture suggested degradation fibres. In composites, prepared dispersing pure aluminium matrix, no appreciable fibre-metal interaction observed. NiAl3 intermetallics observed around adjacent Sometimes found embedded massive that surface can also act as nucleating centre these precipitates.