Preparation of Al-Sc Master Alloy by Aluminothermic Reduction of Sc_2O_3 in NaF-NaCl-KCl-ScF_3 Molten Salt System AITranslate
Abstract AITranslate
Al-Sc master alloys with 0.85%～4.20% scandium content were prepared by aluminothermic reduction of Sc2O3 in NaF-NaCl-KCl-ScF3 molten salt system.Intermetallic Al3 Sc was introduced as a product of Sc2O3 aluminothermic reduction reaction for thermodynamic calculation,and the results reveal that the reaction can spontaneously proceed at 1 013 K～1 173 Kand it is exothermic.Isothermal saturation methods were employed to study the solubility of Sc2O3 in NaF-NaCl-KCl molten salt system.The results show that the solubility of Sc2O3 can be improved by increasing the temperature and NaF content or adding ScF3.Adding ScF3 has the most significant effect.The effects were investigated of temperature and ScF3 addition on Sc recovery during aluminothermic reduction.The results show that Sc recovery increases firstly and then decreases with increased temperature or addition of ScF3,and reaches the maximum at 1 133 Kor with 3% ScF3 addition.The climax of Sc recovery rate is up to 86.06% obtained under the conditions of 3%ScF3addition,1 133 Kand 1.5hisothermal period.The prepared Al-Sc master alloys were analyzed by SEM and EDS.The results demonstrate that there are Al3Sc particles in Al-Sc master alloys,showing square or polygonal shape with small size and dispersed in the matrix.
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Basic Information:
DOI：
Chinese Library Classification Number:TF803.131[冶金工程—有色金属冶金]
Citation Information:
Al-Sc master alloys with 0.85%～4.20% scandium content were prepared by aluminothermic reduction of Sc2O3 in NaF-NaCl-KCl-ScF3 molten salt system.Intermetallic Al3 Sc was introduced as a product of Sc2O3 aluminothermic reduction reaction for thermodynamic calculation,and the results reveal that the reaction can spontaneously proceed at 1 013 K～1 173 Kand it is exothermic.Isothermal saturation methods were employed to study the solubility of Sc2O3 in NaF-NaCl-KCl molten salt system.The results show that the solubility of Sc2O3 can be improved by increasing the temperature and NaF content or adding ScF3.Adding ScF3 has the most significant effect.The effects were investigated of temperature and ScF3 addition on Sc recovery during aluminothermic reduction.The results show that Sc recovery increases firstly and then decreases with increased temperature or addition of ScF3,and reaches the maximum at 1 133 Kor with 3% ScF3 addition.The climax of Sc recovery rate is up to 86.06% obtained under the conditions of 3%ScF3addition,1 133 Kand 1.5hisothermal period.The prepared Al-Sc master alloys were analyzed by SEM and EDS.The results demonstrate that there are Al3Sc particles in Al-Sc master alloys,showing square or polygonal shape with small size and dispersed in the matrix.
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| GB/T 7714-2015 | [1] GAN Pei-yuan, HE Hang-jun, XIE Ying-bang, et al. Preparation of Al-Sc Master Alloy by Aluminothermic Reduction of Sc_2O_3 in NaF-NaCl-KCl-ScF_3 Molten Salt System[J]. Rare Metals and Cemented Carbides, 2016(6): 49-53. |
| MLA | [1] GAN Pei-yuan, et al., "Preparation of Al-Sc Master Alloy by Aluminothermic Reduction of Sc_2O_3 in NaF-NaCl-KCl-ScF_3 Molten Salt System." Rare Metals and Cemented Carbides, no. 6, 2016, pp. 49-53. |
| APA | [1] GAN Pei-yuan, HE Hang-jun, XIE Ying-bang, ZHAN Hai-hong, & LIU Chen. (2016). Preparation of Al-Sc Master Alloy by Aluminothermic Reduction of Sc_2O_3 in NaF-NaCl-KCl-ScF_3 Molten Salt System. Rare Metals and Cemented Carbides(6), 49-53. |
| IEEE | [1] GAN Pei-yuan, HE Hang-jun, XIE Ying-bang, ZHAN Hai-hong, and LIU Chen, "Preparation of Al-Sc Master Alloy by Aluminothermic Reduction of Sc_2O_3 in NaF-NaCl-KCl-ScF_3 Molten Salt System," Rare Metals and Cemented Carbides, no. 6, pp. 49-53, 2016. keywords: {NaF-NaCl-KCl-ScF3;molten salt;aluminothermic reaction;Sc2O3;Al-Sc master alloy;Sc recovery rate} |