Influence of rare earth metals on volumetric characteristics of Al-Ni-Co-R alloys in crystalline and liquid states

Density of Al-Ni-Co-R (R = Nd, Sm, Gd, Tb, Yb) glass-forming alloys is studied experimentally by gamma-absorption method in a wide temperature range including crystalline and liquid states. Molar volumes and thermal expansion coefficients are calculated from the experimental data. It is shown that these melts remain strongly microheterogeneous systems at small overheatings above liquidus. Some regimes of melt heat treatment before quenching are discussed.

Automated summary

The density of Al-Ni-Co-R (R = Nd, Sm, Gd, Tb, Yb) glass-forming alloys is experimentally studied using the gamma-absorption method in a wide temperature range that includes both the crystalline and liquid states. The molar volumes and thermal expansion coefficients are calculated based on the experimental data. It is observed that these melts remain strongly microheterogeneous systems at small overheatings above the liquidus. The effect of different melt heat treatment regimes before quenching is discussed.