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Electrodeposition of aluminium-titanium alloys from molten fluoride-oxide electrolytes

Electrodeposition of aluminium-titanium alloys from molten fluoride-oxide electrolytes

Title: Electrodeposition of aluminium-titanium alloys from molten fluoride-oxide electrolytes
Author: Awayssa, Omar
Saevarsdottir, Gudrun
Meirbekova, Rauan
Haarberg, Geir Martin
Date: 2021-02
Language: English
Scope: 106919
University/Institute: Háskólinn í Reykjavík
Reykjavik University
School: Tæknisvið (HR)
School of Technology (RU)
Department: Verkfræðideild (HR)
Department of Engineering (RU)
Series: Electrochemistry Communications;123
ISSN: 1388-2481
DOI: 10.1016/j.elecom.2021.106919
Subject: Electrochemistry; Aluminium; Titanium; Electrodeposition; Efficiency; Alloy; Eðlisefnafræði; Títan; Aluminum; Málmblendi; Rafskaut; Skilvirkni
URI: https://hdl.handle.net/20.500.11815/2627

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Abstract:

This study reports the direct production of an aluminium-titanium alloy during aluminium electrolysis in fluoride-based melts. Experiments were conducted in a laboratory cell dedicated to current efficiency mea-surements. The temperature was varied from 960 to 980 ◦C at a cathodic current density (CCD) of 0.9 A/cm2 and a cryolite ratio (CR) of 2.2. The titanium content was up to 1.0 wt%. Titanium was added in the form of a TiO2 precursor. Bath samples were collected regularly and analyzed with ICP-MS to observe the decay of titanium during electrolysis. The current efficiency for electrodeposition of Al–Ti alloys was estimated to be at least around 90%. The surface of the solidified metal deposits was mostly flat, but some deposits were partially deformed.

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