An experimental dual cell apparatus for the electro-deposition of alternating metal layers (binary systems) employing a rotating cathode is described. Microstructures of multi-layered systems of Ni-Cu and Ni-Fe are shown and some of their properties are discussed and evaluated. X-ray diffraction data on the behavior of the Ni-Cu systems is given. Also shown is the multi-layered Ni-Cr microstructure. . Data compiled has shown that: lamellar structures exhibit increasing hardness and smoothness with decreasing thickness of single constituent layers (approximate layer thickness range 23,000 to 60 angstroms);fine grained and fairly pure multi-layered structures are rapidly produced;bulk multi-layered structures of Ni-Cu consisting of uniform and extremely thin layers, exhibited some inter diffusion (as plated), as evidenced by x-ray diffraction patterns;x-ray dif fraction data also shows complete inter diffusion of Ni-Cu multi-layers when treated at relatively low temperature and time.
展开▼
