Cu57.5Zr30Ti10Ni2.5 and Cu 55Zr30Ti10Ni5 bulk glassy alloys exhibit high compressive fracture strength of 2200 and 2100 MPa, respectively, and a large supercooled liquid region. Addition of Ni significantly influences devitrification of Cu-Zr-Ti glassy alloy. Cu57.5Zr 30Ti10Ni2.5 glassy alloy primarily forms an intermediate intermetallic compound on heating prior to equilibrium by the diffusion-controlled growth with low energy barrier for nucleation whereas Cu55Zr30Ti10Ni5 and Cu 52.5Zr30Ti10Ni7.5 glassy alloys devitrify forming equilibrium Aba2 (Cu,Ni)10(Zr,Ti)7 phase with slightly reduced lattice parameters compared to Cu 10Zr7 and a small fraction of an unidentified phase. However, pre-existing nanoscale phase of less than 10 nm in size is located in the spaces between the (Cu,Ni)10(Zr,Ti)7 dendritic phase in the spaces between nanoparticles.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry