Preparation of directionally solidified Al2O3/YAG/ZrO2 ternary eutectic ceramic with induction heating zone melting

2019 ◽  
Vol 789 ◽  
pp. 240-248 ◽  
Author(s):  
Shuoyan Zhai ◽  
Juncheng Liu ◽  
Qiang Liu
Keyword(s):  
Induction Heating ◽  
Ternary Eutectic ◽  
Zone Melting ◽  
Heating Zone ◽  
Directionally Solidified

Microstructure Evolution of a Directionally Solidified Ternary Eutectic Mo-Si-B Alloy

2016 ◽  
Vol 879 ◽  
pp. 1226-1232 ◽  
Author(s):  
Manja Krüger ◽  
Georg Hasemann ◽  
Omid Kazemi ◽  
Thorsten Halle
Keyword(s):  
High Temperature ◽  
Field Model ◽  
Ternary Eutectic ◽  
Phase Field Model ◽  
Eutectic Point ◽  
Zone Melting ◽  
Eutectic Phase ◽  
Nominal Composition ◽  
Directionally Solidified ◽  
Isotropic Model

The aim of the present study is to identify the ternary eutectic Mo-Si-B composition to produce directionally solidified materials, which are expected to have excellent high-temperature properties due to the well-defined microstructure. Different alloy compositions in the respective primary solidification areas of the phases were chosen to investigate the microstructural evolution. The results were compared to thermodynamic calculations of the liquidus projection and isopleth phase diagrams using the software FactSageTM. By carrying out these experiments the eutectic point was found to have a nominal composition of Mo-17.5Si-8B (at.%). In the next step, the eutectic alloy was directionally solidified by a zone melting (ZM) process. The evolution of a typical eutectic microstructure due to the growth of lamella-like structures is shown by microstructural investigations. Furthermore, we present a eutectic phase field model for the eutectic Mo-Si-B alloy. The equilibrium interface geometries and interface mobility were calculated using an isotropic model. The results are shown to be in an adequate conformity with the experimental observations.

Crystallographic features of the Al3Nb, Nb2Al and Nb(Ni1−XAlX)2 phases in a directionally solidified ternary eutectic microstructure

2019 ◽  
Vol 147 ◽  
pp. 303-310 ◽  
Author(s):  
Eder S.N. Lopes ◽  
Mariana R. Dal Bó ◽  
Victor C. Opini ◽  
Mariana G. de Mello ◽  
Carlos T. Rios ◽  
...  
Keyword(s):  
Ternary Eutectic ◽  
Eutectic Microstructure ◽  
Directionally Solidified
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