| Popis: |
Spinodal decomposition of a binary solid solution during continuous cooling should lead to a structure that is similar to that resulting from isothermal decomposition, consisting of a superimposition of sinusoidally varying composition modulations clustered about a wavelength λmax that has received maximum amplification. For quench rates which are fast enough to preclude complete decomposition, the profile of the composition-amplitude spectrum is independent of quench rate and the logarithm of the amplitude is inversely proportional to the quench rate. With slower quench rates in which complete decomposition occurs, λmax increases as the — ( 1 6 ) power of the quench rate. The limiting cooling rate required to suppress decomposition, as well as the composition dependence of λmax, are also obtained. These results have been summarized as isothermal-transformation and continuous-cooling-transformation diagrams for spinodal decomposition. |
