Phase equilibrium in Mg-Cu-Y

Area of Science:

• Materials Science
• Metallurgy
• Physical Chemistry

Background:

• Magnesium-based bulk metallic glasses (BMG) are attractive for applications like biomedical devices and sports equipment.
• The Mg-Cu-Y system is a key area for developing advanced BMG alloys.

Purpose of the Study:

• To experimentally investigate phase relations and ternary solubility in the Mg-Cu-Y system.
• To construct the isothermal section of the Mg-Cu-Y system at 673 K.
• To determine phase relations in the Cu-rich region and homogeneity ranges of ternary compounds.

Main Methods:

• Experimental investigation of phase relations and ternary solubility.
• Construction of the isothermal section of the Mg-Cu-Y system at 673 K.
• Differential scanning calorimetry (DSC) for solidification behavior analysis.
• Thermodynamic calculations for alloy solidification and metallic glass formation regions.

Main Results:

• The isothermal section of the Mg-Cu-Y system at 673 K was constructed.
• Phase relations in the Cu-rich region (>66 at.% Cu) were determined for the first time.
• Homogeneity ranges of three ternary compounds were established.
• Solidification behavior of key alloys was analyzed using DSC and thermodynamic calculations.

Conclusions:

• This research provides a comprehensive understanding of the Mg-Cu-Y phase diagram.
• The findings facilitate the design and optimization of Mg-based bulk metallic glasses.
• The study identifies promising metallic glass forming regions within the Mg-Cu-Y system.