Thermal Stability and Mechanical Properties of Mg–Y–Cu–M (M = Ag, Pd) Bulk Amorphous Alloys

Bulk Glass Formation in Mg-Cu-Ag-Y-Gd Alloy

“…4,5) Since Inoue and Masumoto 6) first reported the formation of BMG in Mg 65 Cu 25 Y 10 , enhancement of glass forming ability has been reported in various Mg-Cu-Y-X (X=Ag, Pd, Zn) alloy systems. [7][8][9][10][11] The maximum diameters of the bulk metallic glass samples fabricated by injection casting are 6 mm for Mg 65 Cu 15 Ag 10 Y 10 alloy. 8) Recently, it has also been reported that the Mg 65 Cu 25 Gd 10 ternary alloy has a significantly improved glass forming ability, enabling the fabrication of the bulk metallic glass sample with maximum diameter of 8 mm by conventional Cu-mold casting method in air atmosphere.…”

Fabrication and Mechanical Properties of Mg<SUB>65</SUB>Cu<SUB>15</SUB>Ag<SUB>5</SUB>Pd<SUB>5</SUB>Gd<SUB>10</SUB> Bulk Metallic Glass

“…In general, the bulk metallic glasses exhibit a limited plastic strain ($2%) under uniaxial compression at room temperature. 13) However, the previous results of the compression tests of Mg-Cu-Y bulk metallic glass showed no evidence of plastic yielding before fracture, 3,6) possibly due to the embrittlement resulting from the structural relaxation at room temperature. The improved ductility of the Mg 65 Cu 15 Ag 5 Pd 5 Gd 10 bulk metallic glass may be attributed to the higher T g and enhanced glass forming ability.…”

“…1,2) Since Inoue and Masumoto 3) succeeded in manufacturing Mg 65 Cu 25 Y 10 bulk metallic glass (BMG) having 4 mm in diameter by a Cu-mold casting process, enhancement of glass forming ability has been reported in various Mg-Cu-Y-X (X=Ag, Pd, Zn) alloy systems. [4][5][6][7][8] In Mg-Cu-Y-(Ag, Pd) alloy systems, the atomic size of Ag (0.144 nm) and Pd (0.137 nm) is between Cu (0.128 nm) and Mg (0.160 nm) or Y (0.181 nm), and their heat of mixing against other constituting elements is larger than that of Cu, such as AgMg, À10 kJ/mol; Pd-Mg, À40 kJ/mol; Cu-Mg, À3 kJ/mol; Ag-Y, À29 kJ/mol; Pd-Y, À84 kJ/mol; Cu-Y, À22 kJ/mol. The maximum diameters of the bulk metallic glass samples fabricated by injection casting are 6 Recently, it has been reported that the Mg 65 Cu 25 Gd 10 alloy has a significantly improved glass forming ability, enabling the fabrication of the bulk metallic glass sample with maximum diameter of 8 mm by conventional Cu-mold casting method in air atmosphere.…”

Spark Plasma Sintering of Mg-Based Amorphous Ball-Milled Powders

“…In recent years, much effort has been devoted to prepare a number of Mg-based alloys with a wide supercooled liquid region (ÁT x ) exceeding 20 K. [1][2][3][4][5][6] These new alloys are expected to expand the application fields of bulk metallic glasses (BMGs) due to their high specific strength-strength to weight ratio, and relatively low cost. Mg-based BMGs are generally prepared by high-pressure die-casting or mould casting method.…”