Electrodeposition of Titanium Aluminide (TiAl) Alloy from AlCl3–BMIC Ionic Liquid at Low Temperature
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Titanium and its intermetallic titanium aluminide (TiAl) alloys are technologically exciting materials due to their unique thermomechanical properties such as low density, excellent strength, and exceptional corrosion resistance. Herein, we demonstrate a low-cost route to electrodeposit TiAl alloy from liquid (IL) using a 2:1 molar ratio of aluminum chloride (AlCl3) and 1-butyl-3-methylimidazolium chloride (BMIC). The cyclic voltammetry (CV) and chronoamperometry (CA) techniques were used to investigate the electrosynthesis parameters. The electrodeposition of phase-pure TiAl was accomplished on a copper cathode at a constant potential at 100 °C in a three-electrode configuration that involved Ti plate counter electrode (anode) as a sacrificial donor source of Ti ions in the IL and titanium or platinum wire as a reference electrode. The electrodeposited TiAl alloy electrodes were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction methods. The electrodeposited TiAl alloy exhibited uniform, smooth, and compact morphology.
KeywordsTiAl alloy Electrodeposition BMIC–AlCl3 Ionic liquid
The authors gratefully acknowledge the financial support from National Science Foundation (NSF) Grant No. MEP-CMMI- 1762522. The authors would also like to acknowledge the financial support from American Cast Iron Pipe Company (ACIPCO) and Department of Metallurgical and Materials Engineering at The University of Alabama.
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