Analysis of the extremely rapidly cooled molten system (LiF–CaF2)eut–LaF3

2018 ◽  
Vol 42 (6) ◽  
pp. 4612-4623 ◽  
Author(s):  
Michal Šimurda ◽  
Miroslav Boča ◽  
Peter Švec ◽  
Peter Švec ◽  
Dušan Janičkovič ◽  
...  
Keyword(s):  
Molten Salt ◽  
Rapid Solidification ◽  
Melt Spinning ◽  
Solidification Process ◽  
Salt System ◽  
Rapid Solidification Process ◽  
Molten Salt System

A rapid solidification process (melt spinning) was applied to the fluoride molten salt system (LiF–CaF2)eut–xLaF3 (x = 0, 5, 10, 20, and 30 mol%).

scholarly journals Zn22Al4Ag ALLOY MICROWIRES CASTING TO RAPID SOLIDIFICATION PROCESS BY ROTATING DRUM

10.6036/10098 ◽  
2022 ◽  
Vol 97 (1) ◽  
pp. 53-57
Author(s):  
JUAN MANUEL PRADO LAZARO ◽  
JOSE ANGEL RAMOS BANDERAS ◽  
ISRAEL AGUILERA NAVARRETE ◽  
JAIME ALEJANDRO VERDUZCO MARTINEZ ◽  
ROCIO MARICELA OCHOA PALACIOS
Keyword(s):  
Rapid Solidification ◽  
Melt Spinning ◽  
Thermodynamic Simulation ◽  
Solidification Process ◽  
Rapid Solidification Process ◽  
Rotating Drum ◽  
Scanning Calorimetry ◽  
Jet Stability ◽  
Before And After ◽  
Spinning Process

In this work, the Zn22Al4Ag alloy was synthesized by melting in a muffle furnace.The alloy obtained was characterized by Scanning Electron Microscopy Energy Dispersive Spectroscopy and was analyzed by the X-Ray Diffraction technique, where the crystallinity of the material was verified before and after being processed. Likewise, the Differential Scanning Calorimetry technique was used to obtain the temperatures where phase transformations occurin the alloy. These results were fed to the Termocalc®, software to numerically obtain the phase diagram of the alloy. Subsequently, a section of the ingot was taken to the rapid solidification process by rotating drum. The process variables were manipulated: jet stability, nozzle diameter, distance from the nozzle surface to the cooling medium, the delay time of the molten material in the crucible, speed of the rotating drum and jet angle, until obtaining a microwire with a diameter of ~ 160µm. Finally, it was determined that inadequate control of these parameters can result in powders, flakes or blockage of the crucible outlet. Potentially uses within the micro and nanoworld as an analogy to structural elements and electrical conductors, in addition to its current use as a coating anti-corrosive. Key Words: ZnAlAg alloy, Melt spinning process, Microwire, DSC analysis, Thermodynamic simulation

scholarly journals Rapid solidification of Ni3Al by Osprey deposition

1991 ◽  
Vol 6 (2) ◽  
pp. 361-365 ◽  
Author(s):  
D.G. Morris ◽  
M.A. Morris
Keyword(s):  
High Temperature ◽  
Rapid Solidification ◽  
Cell Walls ◽  
Melt Spinning ◽  
Solidification Process ◽  
High Temperature Annealing ◽  
Rapid Solidification Process ◽  
Material Fabrication ◽  
Very High ◽  
Segregation Structure

A Ni3Al-based alloy containing Cr is examined after preparation by Osprey deposition. The microstructure consists of solidified spherical regions showing cellular segregation interspersed with regions of finer, equiaxed segregation morphology. The segregation structure is characterized by cell interiors rich in aluminum and poor in chromium, while the cell walls are poor in aluminum and rich in chromium. This segregation pattern is the inverse of that expected, based on earlier melt spinning experience, and is explained in terms of the undercooling of the melt prior to solidification. Very high temperature annealing is required to homogenize the material, despite the use of this rapid solidification process for material fabrication.

The characteristic of crystal growth of Nd–Fe–B cast strips during the rapid solidification process

2015 ◽  
Vol 396 ◽  
pp. 283-287 ◽  
Author(s):  
Jingdai Wang ◽  
Yu Meng ◽  
Huaxia Zhang ◽  
Hui Tang ◽  
Rongbing Lin ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Rapid Solidification ◽  
Solidification Process ◽  
Rapid Solidification Process

Molecular Dynamics Simulation Study of the Effect of Ni, Fe, Cu on Cryolite Molten Salt System 78% Na3AlF6-9.5%AlF3-5.0%CaF2-7.5%-Al2O3

2021 ◽  
Vol 1026 ◽  
pp. 39-48
Author(s):  
Han Bing He ◽  
Yu Si Wang ◽  
Ze Xiang Luo ◽  
Jing Zeng
Keyword(s):  
Molecular Dynamics ◽  
Diffusion Coefficient ◽  
Molten Salt ◽  
Diffusion Mechanism ◽  
Research Work ◽  
Dynamics Simulation ◽  
Salt System ◽  
Electrolyte System ◽  
Aluminum Composite ◽  
Molten Salt System

The effect of different additives Ni, Fe, Cu on the structure and properties of electrolyte system 78% Na3AlF6- -9.5%AlF3-5.0%CaF2-7.5%Al2O3 at 1200K and 1.01Mpa was studied by molecular dynamics method. The radial distribution function, coordination number, diffusion coefficient, conductivity, and viscosity of the system were discussed in detail. The results demonstrated that the order of the self-diffusion coefficient of ions in the electrolyte system is: Na+ > F- > O2- > Ca2+ >Al3+. The addition of Ni and Fe connected the free aluminum composite ion groups in the system through fluorine bridges, which enhanced the interaction between Al3+ and Al3+. The addition of Cu weakened the interaction between Al3 + and Al3+ and the F-. The interaction between Al3+ and Na+, [AlF7]4- ionic groups might appeared in the melt system. After adding NiO, Fe2O3, and Cu, the electrical conductivity of the system increased, and the viscosity decreased. The research work revealed the influence of Ni, Fe, Cu on the ion existence form, mobility, inter-ion interaction and diffusion mechanism of cryolite molten salt system, which has important guiding significance for aluminum electrolysis production.

Characterization of AM60 Magnesium Alloy Prepared by Rapid Solidification and Plastic Consolidation Technique

2010 ◽  
Vol 667-669 ◽  
pp. 997-1002
Author(s):  
Tomasz Tokarski
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Rapid Solidification ◽  
Melt Spinning ◽  
Bulk Material ◽  
Structure Refinement ◽  
Hot Extrusion ◽  
Solidification Process ◽  
Protective Atmosphere ◽  
Material Structure

Magnesium and its alloys are attractive candidates for automotive and aerospace applications due to their relatively high strength and low density. However, their low ductility determined by hcp structure of material results in limitation of plastic deformation processing. In order to improve ductility as well as mechanical properties, structure refinement processes can be used. It is well known that effective refining of the material structure can be achieved by increasing the cooling rate during casting procedures, hence rapid solidification process (RSP) has been experimented for the fabrication of magnesium alloys. The present paper reports an experimental investigation on the influence of rapid solidification on the mechanical properties of AM60 magnesium alloy. In order to obtain RS material melt spinning process was applied in protective atmosphere, resulting in formation of RS ribbons. Following consolidation of the RS material is necessary to obtain bulk material with high mechanical properties, as so hot extrusion process was applied. It was noticed that application of plastic consolidation by hot extrusion is the most effective process to achieve full densification of material. For comparison purposes, the conventionally cast and hot extruded AM60 alloy was studied as well. The purpose of the present study was to investigate in detail the effect of rapid solidification and extrusion temperature on the structure and mechanical properties of the materials.

First-principles molecular dynamics investigation on KF-NaF-AlF3 molten salt system

2019 ◽  
Vol 730 ◽  
pp. 587-593 ◽  
Author(s):  
Hui Guo ◽  
Jie Li ◽  
Hongliang Zhang ◽  
Tianshuang Li ◽  
Jiawei Luo ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molten Salt ◽  
First Principles ◽  
Salt System ◽  
Molten Salt System ◽  
First Principles Molecular Dynamics
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