J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (8): 1629-1635.DOI: 10.1016/j.jmst.2019.03.025
Special Issue: High Entropy Alloys 2018-2020
• Orginal Article • Previous Articles Next Articles
Shikai Wu, Ye Pan*(), Jie Lu, Ning Wang, Weiji Dai, Tao Lu
Received:
2018-09-22
Revised:
2018-10-13
Accepted:
2018-10-19
Online:
2019-08-05
Published:
2019-06-19
Contact:
Pan Ye
About author:
1The authors contributed equally to this work.
Shikai Wu, Ye Pan, Jie Lu, Ning Wang, Weiji Dai, Tao Lu. Effect of the addition of Mg, Ti, Ni on the decoloration performance of AlCrFeMn high entropy alloy[J]. J. Mater. Sci. Technol., 2019, 35(8): 1629-1635.
Fig. 1. (a) X-ray diffraction curves of AlCrFeMn and AlCrFeMnM (M = Mg, Ti, Ni) HEAs before decoloration, (b) TEM bright feld image of AlCrFeMnMg before decoloration and the corresponding selected area electron diff;raction pattern.
Fig. 2. SEM images of the AlCrFeMn and AlCrFeMnM (M = Mg, Ti, Ni) HEAs before decoloration reaction. (a) AlCrFeMn, (b) AlCrFeMnMg, (c) AlCrFeMnTi, (d) AlCrFeMnNi.
Fig. 3. UV-vis spectroscopy and normalized concentration of DB6 by 0.5 g/L AlCrFeMn and AlCrFeMnM (M = Mg, Ti, Ni) during the decolorization process at 25 °C, initial pH = 7. (a) AlCrFeMn, (b) AlCrFeMnMg, (c) AlCrFeMnTi, (d) AlCrFeMnNi.
Fig. 5. Comparison of the reaction efficiency among diff;erent powders. Here, the concentration of all the DB6 solutions is 200 mg/L, while the dosage is diff;erent for diff;erent agents, i.e., 6 g/L (high dosage) for AlCrFeMn, AlCrFeMnMg and BM G-MgZn, 13.3 g/L for AlCoCrTiZn, G-FeSiB and BM G-Fe [14,25,26,27,28].
Fig. 8. (a) Normalized concentration as a function of treatment time at diff;erent temperatures ranging from 25 to 55 °C of decoloration of DB6 by AlCrFeMnMg. (b) Plot of (lnt0) vs. (1000/RT) for estimation of the decoloration activation energy of decoloration of DB6 by AlCrFeMnMg, (initial pH = 7, 0.5 g /L AlCrFeMnMg).
Fig. 9. (a) XRD curve of AlCrFeMnMg HEA after decoloration. (b) SEM image of AlCrFeMnMg after decoloration. (c) TEM image of AlCrFeMnMg after decoloration.
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