New Cu-Based Bulk Metallic Glasses with High Strength of 2000 MPa

Seung Y. Shin; J.H. Kim; D.M. Lee; Jong K. Lee; H.J. Kim; Ha Guk Jeong; Jung Chan Bae

doi:10.4028/www.scientific.net/MSF.449-452.945

Paper Titles

Characteristics of Ni-Ti-Zr-Si-Sn Bulk Amorphous HVOF Coating
p.929

Isothermal Crystallization of Zr₅₅Al₁₀Ni₅Cu₃₀ Bulk Amorphous Alloy Near the Glass Transition Temperature
p.933

Deformation Behavior of Ni-Based Metallic Glass Matrix Composites Reinforced by Brass Short-Fibers Synthesized by Warm Extrusion of Powders
p.937

Crystallization Behaviors of the Bulk Amorphous Alloy Ni₆₀Zr₂₅Al₈Y₇
p.941

New Cu-Based Bulk Metallic Glasses with High Strength of 2000 MPa
p.945

Structural and Optical Features of Si-Rich SiO₂ Films Prepared by Magnetron Sputter Techniques
p.949

White Light Emitting Diodes of GaN-Based Sr₂SiO₄:Eu and the Luminescent Properties
p.953

Annealing Temperature Effect of PbZr_0.4Ti_0.6O₃ Film on La_1/2Sr_1/2CoO₃ Bottom Electrode
p.957

Optical and Microstructural Properties of TiO₂, Al₂O₃ and SiO₂ Single Layers Deposited by Plasma Assisted E-Beam Evaporation
p.961

HomeMaterials Science ForumMaterials Science Forum Vols. 449-452New Cu-Based Bulk Metallic Glasses with High...

New Cu-Based Bulk Metallic Glasses with High Strength of 2000 MPa

Abstract:

New Cu-based bulk amorphous alloys exhibiting a large supercooled liquid region and good mechanical properties were formed in a quaternary Cu-Ni-Zr-Ti systems consisting of only metallic elements. The compositional range for the formation of the amorphous alloys that have high glass forming ability (GFA) (> 3 mm diameter) and large supercooled liquid region (> 50 K) is defined in the pseudo-ternary phase diagram Cu-Ni-(Zr, Ti). A bulk amorphous Cu₅₄Ni₆Zr₂₂Ti₁₈ alloy with the diameter of 6 mm can be prepared by copper mold casting. The Cu₅₄Ni₆Zr₂₂Ti₁₈ alloy shows glass transition temperature (T_g) of 712 K, crystallization temperature (T_x) of 769 K and supercooled liquid region (ΔTx) of 57 K. The Cu₅₄Ni₆Zr₂₂Ti₁₈ alloy exhibits high compressive fracture strength of about 2130 MPa with a plastic strain of about 1.5 %. The new Cu-based bulk amorphous alloy with high GFA and good mechanical properties allows us to expect the extension of application fields as a new engineering material.