THE QUANTIFICATION OF CRITERIA FOR PREDICTING GLASS-FORMATION OF BINARY TRANSITION-METALS BY MECHANICAL ALLOYING

A two-dimensional scheme is constructed in order to predict the possibility of amorphization of binary transition-metal systems by mechanical alloying. The two coordinates of the scheme are the size factor (R(A) - R(B))/R(A), and the enthalpy of formation of the amorphous phase DELTAH(f)a, which is calculated from the Miedema model. In this scheme amorphous and non-amorphous regions can be separated by the empirical line DELTA R/R = 0.068 DELTA H(f)a + 0.716. The investigation is an advance in the quantitative prediction of glass-forming ability using a mechanical alloying technique.