Crystallization of Al-based Amorphous Alloys in Good Conductivity Solution

•The corrosion-induced crystallization has been found in Al-based glassy alloys.•Phase separation and oxidation occur during the heavy corrosion process.•Heterogeneity between the two sides of the ribbon lead to the bending.•Crystallization and phase separation can embrittlement the amorphous ribbons.•The percolation of backbone clusters can be enhanced by increasing cNi.

The corrosion-induced crystallization of Al94–xNixGd6 (x = 6 and 10, in at.%) metallic glasses as well as phase separation, oxidation and cracking in good conductivity solution has been investigated by various techniques. The transmission electronic microscopy (TEM) result reveals that crystalline intermetallics and oxides present on the electrochemically thinned hole edge, and the phase separation occurs in the matrix of the as-spun ribbons with the circumferential speed Rc of 29.3 m/s. In addition, the bending and cracking of the samples occur after corrosion. The influence of Ni content on the phase separation, bending and cracking can be explained by the fact that the percolation of the backbone clusters in the amorphous alloy melts and glasses is enhanced by increasing the composition of Ni.