Evolutions of rod diameter, molten zone and temperature gradient of oxide eutectic ceramics during laser floating zone melting
Source abstract
Abstract
Abstract Laser floating zone melting (LFZM) is an important directional solidification (DS) technique in oxide ceramic fabrication owing to its very high temperature gradient and rapid cooling rate. In this work, variations and evolutions of rod diameter, molten zone, and temperature gradient are explored in fabrication of Al2O3-based eutectic ceramics. At low solidification rate of 4 μm/s, periodical oscillations with almost the same period (~275 s) are produced in melting zone shape/size, as-grown rod diameter, temperature distribution, and temperature gradient. The temperature gradient fluctuates between 3.6 × 103 K/cm and 6.9 × 103 K/cm with an average value of about 5.3 × 103 K/cm. As increasing the solidification rate, the temperature gradient decreases and the periodical oscillation weakens. Based on the evolutions of the temperature field, interface location and molten zone shape, the formation mechanism of periodical oscillation during LFZM processing is evaluated.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · Laser Material Processing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. A ductile ceramic eutectic composite with high strength at 1873 K10.1038/37937 ↗
2. Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics10.1038/s41467-018-03467-7 ↗
3. Nanosized microstructure of Al2O3-ZrO2 (Y2O3) eutectics fabricated by laser engineered net shaping10.1016/j.scriptamat.2014.09.026 ↗
4. Nanostructured Al2O3-YAG-ZrO2 ternary eutectic components prepared by laser engineered net shaping10.1016/j.actamat.2019.03.020 ↗
5. Preparation of directionally solidified Al2O3/YAG/ZrO2 ternary eutectic ceramic with induction heating zone melting10.1016/j.jallcom.2019.03.045 ↗
6. Microstructure refinement of melt-grown Al2O3/YAG/ZrO2 eutectic composite by a new method: melt superheating treatment10.1016/j.scriptamat.2013.01.009 ↗
7. Directionally solidified eutectic ceramic oxides10.1016/j.pmatsci.2005.10.002 ↗
8. Formation mechanism of a wrinkled and textured Al2O3-ZrO2 nanoeutectic rapidly solidified from oxy-acetylene flame remelting10.1111/jace.16003 ↗
9. Insights into microstructural formation of pulse plasma semisolid to liquid processing of Al2O3-ZrO2 eutectic ceramics10.1111/jace.15715 ↗
10. Competitive growth of Al2O3/YAG/ZrO2 eutectic ceramics during directional solidification: effect of interfacial energy10.1111/jace.16057 ↗
11. Microstructures and mechanical properties of directionally solidified Al2O3/GdAlO3 eutectic ceramic by laser floating zone melting with high temperature gradient10.1016/j.jeurceramsoc.2016.11.041 ↗
12. Rapid eutectic growth of Al2O3/Er3Al5O12 nanocomposite prepared by a new method: melt falling-drop quenching10.1016/j.scriptamat.2016.07.028 ↗
13. Study of the stability of the molten zone and the stresses induced during the growth of Al2O3-Y3Al5O12 eutectic composite by the laser floating zone technique10.1016/j.jeurceramsoc.2010.08.022 ↗
14. Microstructure evolution of Al2O3/Y3Al5O12 eutectic crystal during directional solidification10.1016/j.scriptamat.2015.05.038 ↗
15. A modified preparation technique and characterization of directionally solidified Al2O3/Y3Al5O12 eutectic in situ composites10.1016/j.scriptamat.2008.11.010 ↗
16. Directionally solidified Al2O3-Er3Al5O12-ZrO2 eutectic ceramics with interpenetrating or nanofibrillar microstructure: residual stress analysis10.1111/j.1551-2916.2011.05068.x ↗
17. High temperature creep deformation of directionally solidified Al2O3/Er3Al5O1210.1016/S1359-6454(02)00571-2 ↗
18. A simplified finite element model for numerical simulation of temperature field and optimization of parameters in single crystal growth by optical floating zone technique10.1016/j.jcrysgro.2016.09.026 ↗
19. Effect of an abrupt change in pulling rate on microstructures of directionally solidified Al2O3-Er3Al5O12 eutectic and off-eutectic composite ceramics10.1016/j.ceramint.2018.12.151 ↗
20. Processing, microstructure and mechanical properties of directionally-solidified Al2O3-Y3Al5O12-ZrO2 ternary eutectics10.1016/j.jeurceramsoc.2005.11.005 ↗
21. Solidification microstructure of laser floating zone remelted Al2O3/YAG eutectic in situ composite10.1016/j.jcrysgro.2012.02.017 ↗
22. Directional solidification and growth characteristics of Al2O3/Er3Al5O12/ZrO2 ternary eutectic ceramic by laser floating zone melting10.1007/s10853-017-0860-9 ↗
23. Study of the gas inclusions in Al2O3/Y3Al5O12 and Al2O3/Y3Al5O12/ZrO2 eutectic fibers grown by laser floating zone10.1016/j.jcrysgro.2007.02.042 ↗
24. Growth of Al2O3/ZrO2 (Y2O3) eutectic rods by the laser floating zone technique: effect of the rotation10.1016/j.jeurceramsoc.2005.01.017 ↗
25. Numerical and experimental study of electron beam floating zone melting of Iridium single crystal10.1016/j.jmatprotec.2017.07.016 ↗
26. Shape and stability of a floating liquid zone between two solids10.1063/1.366524 ↗
27. High temperature properties and thermal stability of a unidirectionally solidified Al2O3/Er3Al5O12 eutectic composite10.2320/jinstmet1952.64.2_101 ↗
28. Microstructure control, competitive growth and precipitation rule in faceted Al2O3/Er3Al5O12 eutectic in situ composite ceramics prepared by laser floating zone melting10.1016/j.jeurceramsoc.2019.01.015 ↗
29. Microstructure tailoring and thermal stability of directionally solidified Al2O3/GdAlO3 binary eutectic ceramics by laser floating zone melting10.1016/j.ceramint.2018.01.228 ↗
30. An analytical model of irregular eutectic growth and its application to Fe-C10.1016/0001-6160(87)90059-9 ↗
31. Cooling rate and microstructure of rapidly solidified Al-20 wt.% Si alloy10.1016/j.msea.2005.10.040 ↗
32. Newton's method for solving heat transfer, fluid flow and interface shapes in a floating molten zone10.1002/fld.1650190105 ↗
33. Influence of liquid bridge volume on the onset of oscillation in floating zone convection I, Experiments10.1016/0022-0248(94)90349-2 ↗
34. Steady convection caused by the temperature inhomogeneity in a cylindrical floating zone10.1143/JJAP.27.20 ↗
35. Temperature oscillation in a tin liquid bridge and critical Marangoni number dependency on Prandtl number10.1016/S0022-0248(00)00936-2 ↗
36. High thermal gradient directional solidification and its application in the processing of nickel-based superalloys10.1016/j.jmatprotec.2009.07.022 ↗