Fractal morphologies of dual amorphous phases observed in Y–Ti(Nb)–Co ternary systems upon ion beam mixing

Dual amorphous phases with fractal morphology are observed in the ternary metallic Y–Ti–Co/Y–Nb–Co systems upon ion irradiation. Interestingly, the obtained dual amorphous phases in the two systems feature different fractal dimension. For Y–Ti–Co system, the fractal dimension is around 2.16 suggesting that it grows through Reaction-Limited-Cluster-Aggregation model. For Y–Nb–Co system, however, the fractal dimension is around 2.54, suggesting that it grows through Diffusion-Limited-Aggregation model.