Fray Symposium - Reactions Between Ti3SixAl(1-x)C2 (x = 0 - 1) Solid Solutions And A Molten Cryolite-AlF3-CaF2-Al2O3 Electrolyte
CD-FraySymposium_Volume1
CD shopping page

2011-Sustainable Industrial Processing Summit
SIPS2011 Volume 3: Molten Salts & Ionic Liquids 2011

Editors:Florian K
Publisher:Flogen Star OUTREACH
Publication Year:2012
Pages:630 pages
ISBN:978-0-9879917-2-0
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)

    Reactions Between Ti3SixAl(1-x)C2 (x = 0 - 1) Solid Solutions And A Molten Cryolite-AlF3-CaF2-Al2O3 Electrolyte

    Xiao Yan1; Ty Tran2; Marshall Lanyon2; Shou Sun2;
    1THE UNIVERSITY OF QUEENSLAND, , Australia; 2CSIRO, Clayton, Australia;
    Type of Paper: Regular
    Id Paper: 306
    Topic: 6

    Abstract:

    Reactions between polycrystalline Ti3SixAl(1-x)C2 solid solutions (x = 0 - 1) and a Na3AlF6-AlF3-CaF2-Al2O3 electrolyte melt were studied using the immersion test method in argon at 960 and 1010 °C, respectively. Analyses of the tested samples by XRD and SEM-EDS showed that the Si was stable whereas the Al was leached out of crystal structure of the Ti3SixAl(1-x)C2 sample into the melt x = 0.2. Both Si and Al were leached out of the Ti3SixAl(1-x)C2 solid solutions at x ≠ 0.2 into the melt. A further XRD analysis of the tested Ti3SixAl(1-x)C2 samples at x ≠ 0.2 revealed that the leaching of both Si and Al of the solid solutions resulted in phase transformations of the hexagonal matrix phase to a phase similar to TiCσ (0 < σ < 1) due to the leaching of Si and Al atoms out of the basal plans of the crystalline phases into the melt. An inspection by SEM-EDX further revealed that the TiC-like phase exhibited finely grained textures and was chemically stable towards the melt. The mechanism of Ti3SixAl(1-x)C2/melt reactions and subsequent dissolution of the leached atoms into the melt is discussed in detail.

    Keywords:

    chemical stability, ceramics, molten salt electrolyte, dissolution

    Full Text:

    Click here to access the Full Text

    Cite this article as:

    Yan X, Tran T, Lanyon M, Sun S. Reactions Between Ti3SixAl(1-x)C2 (x = 0 - 1) Solid Solutions And A Molten Cryolite-AlF3-CaF2-Al2O3 Electrolyte. In: Florian K, editors. Sustainable Industrial Processing Summit SIPS2011 Volume 3: Molten Salts & Ionic Liquids 2011. Volume 3. Montreal(Canada): FLOGEN Star Outreach;2012. p..