Characteristics and evolution of microstructure in Al-based amorphous alloys
铝基非晶合金微观结构的特点与演变

The Al 90 Fe 5Ce 5 and Al 83 Zn 10 Ce 7 alloys were analyzed for studying the microstructural characteristic and evolution. In addition to the icosahedral phase surrounded by the Al phase, the metastable Al 6Fe phase is finely distributed in the matrix of the amorphous Al 90 Fe 5Ce 5 alloy. In Al 83 Zn 10 Ce 7 alloy, the stable intermetallic compounds Al 2ZnCe 2 form as the primary phase during solidification. The precipitation of nanocrystals of Al was accompanied by the intermetallic compound Al 2ZnCe 2. The suppression of growth of nuclei of various phases formed during rapid melt quenching leads to the high glass formation ability. The competitive nucleation and growth limitation of the various phases contribute to the complex microstructures characteristic of the Al based alloys.