Preparation of Thermo-Stable Bulk Metallic Glass of Nd₆₀Cu₂₀Ni₁₀Al₁₀ by Rapid Compression

Melt of Nd₆₀Cu₂₀Ni₁₀Al₁₀ alloy is solidified by rapid compression from 0.1 to 5.5 GPa at 793 K and from 0.1 to 3.2 GPa at 873 K within 20 ms, separately. A fully bulk metallic glass is obtained by the rapid compression method. By comparing with as-cast bulk metallic glass (BMG), it is found that Nd₆₀Cu₂₀Ni₁₀Al₁₀ BMG prepared by rapid compression exhibits a higher thermodynamic stability and a paramagnetic property. The relationship between the glass-formation temperature and the pressure in rapid compression for the BMG is demonstrated in the P-T phase diagram.