Effect of Sc Addition on High-Temperature Oxidation Performance of Al-Li Alloy
Abstract
:1. Introduction
2. Experimental Materials and Methods
2.1. Experimental Alloys and Preparation
2.2. Experimental Apparatus and Method
3. Results and Analysis
3.1. Effect of Temperature on High-Temperature Oxidation Behavior of Al-Li Alloy
3.2. Effect of Sc on Oxidation Resistance of Al-Li Alloy at High Temperature
3.3. Oxidation Kinetics Analysis of Sc Alloyed Alloy
3.4. Effect of Temperature on Oxidation Morphology of Alloy
3.4.1. Macroscopic Morphology of Al–Li Alloy Oxidized at Different Temperatures
3.4.2. Effect of Temperature on Surface Morphology of Aluminum–Lithium Alloy after Oxidation
3.5. Phase Analysis of Oxide Film
4. Conclusions
- (1)
- At different temperatures, the oxidation weight gain in the early stage of oxidation was significant, and the oxidation rate gradually decreased and tended to be stable with the extension of the oxidation time. The oxidation weight gain after oxidation of Al-2Li alloys with the addition of the element Sc is reduced to 0.046 mg/cm2, 0.531 mg/cm2, 0.602 mg/cm2, and 1.182 mg/cm2 for 5 h at 400 °C, 450 °C, 500 °C, and 550 °C, and the fitted response indices were reduced to 0.37, 0.66, 0.63 and 0.60, respectively. In addition, the oxidation weight gain rate of the alloy after the addition of Sc slowed down, which improved the high-temperature oxidation resistance of the alloy.
- (2)
- The test results show that the oxidation product generated by oxidation is Li2CO3 and, with the increase of oxidation temperature, more Li2CO3 is generated. In the aluminum–lithium alloy after Sc alloying, less Li2CO3 is generated in the oxide film after oxidation, and the oxide film is more complete and compact.
- (3)
- There is no rare earth oxide formation in the rare earth alloyed oxide film, but the high-temperature oxidation resistance of an Al-Li alloy is improved after Sc alloying. The oxidation reaction index is reduced, which is consistent, and it is verified that the addition of rare earth elements can inhibit the movement and diffusion of metal cations in the high-temperature oxidation process to a certain extent.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
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Li (wt%) | Sc (wt%) | Al | |
---|---|---|---|
Al-2Li | 1.74 | - | Bal |
Al-2Li-0.2Sc | 1.75 | 0.20 | Bal |
400 °C | 450 °C | 500 °C | 550 °C | |
---|---|---|---|---|
Al-2Li | 1.76 | 0.85 | 0.64 | 0.62 |
Al-2Li-0.2Sc | 0.37 | 0.66 | 0.63 | 0.60 |
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Zhu, B.; Le, Q.; Ren, L.; Zhou, X.; Hou, X.; Li, D.; Bao, L. Effect of Sc Addition on High-Temperature Oxidation Performance of Al-Li Alloy. Crystals 2023, 13, 22. https://doi.org/10.3390/cryst13010022
Zhu B, Le Q, Ren L, Zhou X, Hou X, Li D, Bao L. Effect of Sc Addition on High-Temperature Oxidation Performance of Al-Li Alloy. Crystals. 2023; 13(1):22. https://doi.org/10.3390/cryst13010022
Chicago/Turabian StyleZhu, Baosong, Qichi Le, Liang Ren, Xiong Zhou, Xianzhong Hou, Dandan Li, and Lei Bao. 2023. "Effect of Sc Addition on High-Temperature Oxidation Performance of Al-Li Alloy" Crystals 13, no. 1: 22. https://doi.org/10.3390/cryst13010022
APA StyleZhu, B., Le, Q., Ren, L., Zhou, X., Hou, X., Li, D., & Bao, L. (2023). Effect of Sc Addition on High-Temperature Oxidation Performance of Al-Li Alloy. Crystals, 13(1), 22. https://doi.org/10.3390/cryst13010022