Formation of bulk Pd-Cu-Si-P glass with good mechanical properties

Glassy Pd_85-xCu_xSi₁₀P₅ (x = 5-12at%) alloys with a supercooled liquid region (ΔT_x) of 51-73 K were synthesized despite the low metalloid content. The glassy Pd ₇₉Cu₆Si₁₀P₅ alloy exhibits the largest ΔT_x of 73 K in the present alloy system and its critical diameter for glass formation reaches 5 mm by copper mold casting. For the bulk glassy Pd₇₉Cu₆Si₁₀P₅ alloy, the Young's modulus, compressive yield strength and maximum compressive strength are 82GPa, 1475 MPa and 1575 MPa, respectively. Distinct compressive plastic strain of 3.5% and a vein pattern morphology on the fracture surface indicate the ductile nature of the bulk glassy Pd-Cu-Si-P alloy.