Fabriction Of Ni-B Nanocrystalline Foil

In this paper, electroless technology had been used to coating Cu,Ni-B on the surface of plastic matrix first, and then to dissolve matrix plastics in solvent to get Ni-B foil. The effect of the bath content of NiCl, KBH4, NH2(CH2)2NH2, Pb(NO3)2 and PH value on the deposition rate were studied, and the microstructure,grain size and properties of prepared Ni-B foil were measured by XRD and TEM.Experiment results show that the electroless and amorphous crystallization technology had been synthesized the Ni-B foil which the average grain size is about 39~47 nm.Ni-B deposition rate was increase followed by decrease with the increased of the content of NiCl, KBH4, NH2(CH2)2NH2, Pb(NO3)2 , and deposition rate was increase with coating temperature.Two novel heat release peaks were appeared at 301℃and 432℃ in the Ni-Balloy containing 2.002wt%B.The growth mode of Ni-B coating has also been studied based on the theory of electroless deposit. The ratio of the growing rate on the transverse direction to the one on the vertical direction is the key factor in determining the growth mode. When the latter rate is greater than the former, the deposit mode conforms to the columnar growth. Otherwise, it conforms to granular or laminar mode. The growth mode will determine the morphology and structure of the coating.