Abstract
Al-Ti master alloys were prepared by aluminothermic reduction between the dissolved titanium dioxide and aluminum in cryolite melts at 960°C. The kinetic analysis by differential scanning calorimetry indicated that the apparent activation energy of the reaction of reducing titanium dioxide by aluminium is 22.3 kJ/mol, and the reaction order is 0.5. The products were analyzed by means of X-ray diffraction, X-ray fluorescence, scanning electron microscopy and energy dispersive spectrometer. Results from X-ray diffraction showed that the phase compositions of produced alloys are Al and Al3Ti. In addition, Al-Ti master alloys containing 2–6 mass% Ti were formed at different reduction time of 2–5h in aluminothermic reduction experiment.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
H.Y. Zhou, and Z.Z. Zhan. Research progress of TiAl intermetallic compounds, Journal of Guangxi University, 1999, 12: 262–264.
X.H. Zhang, and Z.B. Lang. The research of intermetallic compounds prepared by powder metallurgy technology, Aerospace Materials and Technology, 2007, (5): 53–56.
J.H. Wen, B.Y. Huang, and H.B. Lv. Study on TiAl alloy prepared by powder metallurgy, Rare Metal Materials and Engineering, 1993, 2(4): 30–34.
B. Yang, Y.H. He, X.Q. Tan. The progress in research of TiAl alloys by powder metallurgy, Powder Metallurgy Industry, 1998, 8(2): 26–28.
Volkert G. Ferroalloy metallurgy [M]. Shanghai: Shanghai Science and Technology Press, 1978.
Z.X. Qiu, Y.X. Yu, and M.J. Zhang, Preparation of Al-Ti-B master alloys by thermal reduction and electrolysis of B2O3 and TiO2 in cryolite-aluminia melts, Aluminium, 1988, 64 (12): 1254–1257.
Z.X. Qiu, M.J. Zhang, and Y.X. Yu. Formation of aluminium-titanium alloys by electrolysis and by thermal reduction of titania in cryolite-aluminia melts, Aluminium, 1988, 64 (6): 606–609.
J. Thonstad, and S. Rolseth. Light Metals, 1976, 1: 171.
Z.X. Qiu, F. Liman, N.X. Feng, K. Grjotheim, and H. Kvande. Light Metals, 1987, 13: 409.
A.I. Beljajew. Metallugy of Non-Ferous Metals, 1956, 26: 143.
Z.X. Qiu, F. Liman, K. Grjotheim, and H. Kvande. Journal of Applied Electrochemistry, 1987, 17: 707.
M. Ueda, Y. Abe, and T. Ohtsuka. Reduction of SiO2 to Si by aluminum metal fog in NaCl- KCl-AlCl3 molten salt, Materials Letters, 2006, 60: 635–638.
D.L. Cao, Z.X. Qiu, J.K. Wang, Z.N. Shi, Z.W. Wang. Production of Al-Ti master alloy starting from TiO2, Foundry, 55(8): 803–806.
B. Li, G. Chen, H. Zhang, and C.D. Sheng. Development of non-isothermal TGA-DSC for kinetics analysis of low temperature coal oxidation prior to ignition, Fuel, 2014, 118: 385–391.
E.S. Freeman, and B. Carroll. J. Phys. Chem., 1958, 62: 394.
N.A. Liu, and W.C. Fan. Critical consideration on the Freeman and Carroll method for evaluating global mass loss kinetics of polymer thermal degradation, Thermochim. Acta, 1999, 338: 85–94.
L.P. Niu, T.A. Zhang, H.B. Zhang, and Z.H. Dou. Thermodynamics and kinetics of preparation of high titanium ferroalloy by thermite reaction, The Chinese Journal of Nonferrous Metals, 2010, 20: 425–428.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 TMS (The Minerals, Metals & Materials Society)
About this chapter
Cite this chapter
Liu, A. et al. (2015). Preparation of Al-Ti Master Alloys by Aluminothermic Reduction of TiO2 in Cryolite Melts at 960°C. In: Jiang, T., et al. 6th International Symposium on High-Temperature Metallurgical Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48217-0_31
Download citation
DOI: https://doi.org/10.1007/978-3-319-48217-0_31
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48603-1
Online ISBN: 978-3-319-48217-0
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)