The nonlinear mechanism of the fluid-like fluctuation in the Cu-Zn-Al alloy

The fluctuation patterns observed in the Cu-Zn-Al alloy are reported and ca lculated by using a nonlinear approach in this paper. The results show that the fluid-like oscillations of the atom-cells of mum order have exhibited the feature of solitary waves. The oscillation can be maintained by the ext ernal driving,and as the internal friction becomes strong,the decay of the amplitude of solitary wave with respect to the time obeys the exponential m le exp ( - kt). The calculation is in good agreement with the experimental observations.