scholarly journals Liquid-liquid phase separation of CaCO3 revealed by in situ transmission electron microscopy

2021 ◽  
Author(s):  
Biao Jin ◽  
Ying Chen ◽  
Jim De Yoreo ◽  
Harley Pyles ◽  
Zheming Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Transmission Electron ◽  
Liquid Liquid Phase Separation

scholarly journals Alloy Design, Thermodynamics, and Electron Microscopy of Ternary Ti-Ag-Nb Alloy with Liquid Phase Separation

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5268
Author(s):  
Takeshi Nagase
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Phase Separation ◽  
Liquid Phase ◽  
Alloy System ◽  
Liquid Phase Separation ◽  
Mixing Enthalpy ◽  
Transmission Electron ◽  
Melt Spun ◽  
Melt Spun Ribbons

The Ti–Ag alloy system is an important constituent of dental casting materials and metallic biomaterials with antibacterial functions. The binary Ti–Ag alloy system is characterized by flat liquidus lines with metastable liquid miscibility gaps in the phase diagram. The ternary Ti–Ag-based alloys with liquid phase separation (LPS) were designed based on the mixing enthalpy parameters, thermodynamic calculations using FactSage and Scientific Group Thermodata Europe (SGTE) database, and the predicted ground state diagrams constructed by the Materials Project. The LPS behavior in the ternary Ti–Ag–Nb alloy was investigated using the solidification microstructure analysis in arc-melted ingots and rapidly solidified melt-spun ribbons via trans-scale observations, combined with optical microscopy (OM), scanning electron microscopy (SEM) including electron probe micro analysis (EPMA), transmission electron microscopy (TEM), and scanning transmission electron microscopy (STEM). The solidification microstructures depended on the solidification processing in ternary Ti–Ag–Nb alloys; macroscopic phase-separated structures were observed in the arc-melted ingots, whereas fine Ag globules embedded in the Ti-based matrix were observed in the melt-spun ribbons.

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