Interdiffusivities have been measured in Cu/NiFe ternary alloys containing 53at.% Cu, 40 at.% Ni and 7 at.% Fe. Isothermal anneals were performed at temperatures: 320, 345 and 400°C using thin films containing composition modulations (1.6-4.98 nm) produced by the vapor-phase growth technique. Spinodal decomposition in these films was observed in the X-ray diffraction pattern as indicated by the growth of satellite intensities at 320°C. The diffusivities at each temperature were determined from the growth or decay rate of the composition modulation. A plot of the interdiffusion coefficient D ̃B, versus the dispersion relation B2 demonstrated anomalous behavior at certain wavelengths at which an enhanced elastic modulus effect is observed. The critical spinodal temperature was estimated and first three gradient energy coefficients were calculated using a nonlinear regression fit to the DB vs B2 curve.
|Original language||English (US)|
|Number of pages||5|
|State||Published - Oct 1985|
All Science Journal Classification (ASJC) codes