Mg 65 Cu 22 Zn3Y5Nd5 bulky amorphous alloy was prepared in a traditional Cu mould in atmosphere condition.The structure

glass transition

crystallization and melting behavior of the amorphous alloy were investigated by XRD（X-ray diffusion）and DSC(differential scanning calorimetry.The results show that amorphous alloy strip with maximum 4.5 mm in thickness can be obtained with △Tx（undercooling liquid zone temperature）of 51.3 K and T rg（approximately glass transition temperature）of 0.59.Mg 65 Cu 22 Zn3Y5Nd5 bulky amorphous alloy exhibits a more complex crystallization process

which performed through three steps

compared with the alloy free Zn.With the isothemal treatment

the Mg 65 Cu 22 Zn3Y5Nd5 bulky amorphous alloy is converted from amorphous alloy into the crystal state where the sharp crystal peaks superimpose on the simple amorphous peak.The structure of the alloy becomes more homogeneous and finer with annealing step by step.