Synthesis and Mechanical Properties of New Cu-Based Cu-Zr-Al Glassy Alloys with Critical Diameters up to Centimeter Order

Abstract

A new Cu-based Cu-Zr-Al glassy alloy has been found to exhibit very high glass-forming ability, wide supercooled liquid region and high fracture strength. The addition of Al to a binary eutectic Cu 55 Zr 45 alloy significantly increases the stabilization of supercooled liquid as well as glass-forming ability in Cu 55Àx Zr 45 Al x (x ¼ 0 to 10) alloy series. The largest supercooled liquid region of 80 K, reduced glass transition temperature of 0.60 and value of 0.417 are simultaneously obtained for a ternary eutectic Cu 47 Zr 45 Al 8 alloy, which can fabricate fully glassy sample with critical diameters up to 15 mm by copper mold casting. The bulk glassy alloy also exhibits high compressive fracture strength of over 1900 MPa and the high Young's modulus above 100 GPa.

A Ti–Zr–Be–Fe–Cu bulk metallic glass with superior glass-forming ability and high specific strength

“…Fig. 2 displays the DSC curves for 2-mm-diameter as-cast (Ti 41 Zr 25 Be 28 Fe 6 ) 100Àx Cu x (x ¼ 0e20 at.%) alloy rods at a heating Table 1 The critical diameters (D max ) and thermal parameters of (Ti 41 Zr 25 Be 28 Fe 6 ) 100Àx Cu x (x ¼ 0, 2,5,7,9,11,13,15,20 at.%) BMGs with a measuring error less than AE2 K for temperature.…”

Bulk metallic glassy surface native oxide: Its atomic structure, growth rate and electrical properties

“…The Cu 47 Zr 45 Al 8 alloy (composition is given in nominal atomic percentages), a typical representative of CuAZr BMGs with high strength and exceptionally high GFA among ternary CuAZrAAl and ZrACuAAl alloys (its critical sample diameter obtained by copper mold casting is 15 mm) [43], was chosen for study.…”

Structure of the glass-forming metallic liquids by ab-initio and classical molecular dynamics, a case study: Quenching the Cu60Ti20Zr20 alloy

“…Nevertheless, to test the idea of adjusting the parameters in the liquid, we used the classical φ SW -MD route with the parameters {a l i } to estimate the critical temperature of the glass transition. This was done from the behavior of the constant-pressure heat capacity C p , shown in figure (10).…”