Corrosion of Al-Li alloy melt on oxide refractories
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 15 June 2023
Issue publication date: 2 August 2023
Abstract
Purpose
When smelting Al-Li alloy, the material inevitably comes into contact with various oxide-refractories. These refractories are subjected to varying degrees of melt-corrosion at high temperatures. The purpose of this study is to find stable oxide refractories at casting temperature.
Design/methodology/approach
Four materials were selected for evaluation, and their corrosion by the Al-Li alloy at casting temperature and different holding times was measured. Subsequently, scanning electron microscopy and energy-dispersive spectroscopy were used to study the interfaces. Stable refractory materials were selected by comparing the thicknesses of the reaction layers.
Findings
The thickness of the Al-Li/ZrO2 reaction layer varies linearly with the square root of the holding duration. Therefore, the growth of the reaction layer is controlled by diffusion. The reaction layer of Al-Li/Al2O3 is thinner, and its growth is also controlled by diffusion. However, there were no obvious reaction layers between the Al-Li alloy and MgO or Y2O3. By comparing these reaction-layer thicknesses, the order of stability was found to be ZrO2 < Al2O3 < MgO and Y2O3.
Originality/value
These results provide a scientific basis for the optimal selection of refractory materials for Al-Li alloy smelting.
Keywords
Acknowledgements
The author is thankful for the financial support from the State Key Laboratory of Advanced Metallurgy (Grant No. 41621025, Thermodynamic and Kinetic Research on Casting Process of Al–Li Alloy System).
Declaration of competing interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Data availability: The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.
Citation
Han, W. and Hu, X. (2023), "Corrosion of Al-Li alloy melt on oxide refractories", Anti-Corrosion Methods and Materials, Vol. 70 No. 5, pp. 229-235. https://doi.org/10.1108/ACMM-03-2023-2779
Publisher
:Emerald Publishing Limited
Copyright © 2023, Emerald Publishing Limited