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|Title:||A new composition zone of bulk metallic glass formation in the Cu-Zr-Ti ternary system and its correlation with the eutectic reaction|
Phases and equilibria
Scanning electron microscopy
|Source:||Dai, C.-L., Guo, H., Li, Y., Xu, J. (2008-08-01). A new composition zone of bulk metallic glass formation in the Cu-Zr-Ti ternary system and its correlation with the eutectic reaction. Journal of Non-Crystalline Solids 354 (31) : 3659-3665. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jnoncrysol.2008.04.013|
|Abstract:||A new composition region of bulk metallic glass formation, around Cu52Zr40Ti8, was discovered in the Cu-Zr-Ti ternary system, for which monolithic bulk metallic glass rods of 4 mm in diameter can be fabricated using copper mold casting. The solidification of the Cu52Zr40Ti8 deeply-undercooled liquid mainly undergoes a univariant eutectic reaction, (L → Cu10Zr7 + CuZr), even though this composition was predicted to be a ternary eutectic point (L → Cu10Zr7 + CuZr + Cu2ZrTi) by CALPHAD calculations. With respect to the deep-eutectic reaction of (L → Cu10Zr7 + CuZr) in the Cu-Zr binary alloys, alloying of Ti has a significant effect on further stabilizing the liquid, as indicated as a drop of the univariant eutectic groove, limiting the coupled growth of two crystalline phases, hence increasing the glass-forming ability. © 2008 Elsevier B.V. All rights reserved.|
|Source Title:||Journal of Non-Crystalline Solids|
|Appears in Collections:||Staff Publications|
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