Effects of Microalloying on Microstructure and Properties of Multiphase Reinforced CuZr Based Amorphous Composites
Based on the[(Zr0.5Cu0.5)0.93Al0.07]97Ta3(atomic ratio)amorphous composites with multiphase compound structure,the effects of alloying elements on microstructure and mechanical properties were investigated through micro-alloying of different elements(Ti,Co,Sn).The results indicate that Sn addition can simultaneously improve the amor-phous forming ability of the matrix and thermal stability of B2-CuZr phase,which avoids the occurrence of martensitic transformation of B2-CuZr phase or precipitation of other crystalline phases in the matrix during the solidification pro-cess,leading to the multiphase reinforced Cu-Zr based amorphous composites with uniformly dispersed reinforcing phases.The compressive strength and plastic deformation of developed[(Zr0.5Cu0.5)0.925Al0.07Sn0.005]97Ta3 amorphous composites are increased by 9.6%and 131.3%,respectively,compared with those of[(Zr0.5Cu0.5)0.93Al0.07]97Ta3.
Amorphous CompositesMicroalloyingMultiphase Compound StructureStrength and Toughness
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