Thermodynamic description of reactions between Mg and CaO
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Thermodynamic description of reactions between Mg and CaO. / Schmid-Fetzer, Rainer; Kozlov, Artem; Wiese, Björn et al.
Magnesium Technology 2016 - Held During TMS 2016: 145th Annual Meeting and Exhibition. ed. / Alok Singh; Kiran Solanki; Michele Viola Manuel; Neale R. Neelameggham. The Minerals, Metals & Materials Society, 2016. p. 67-72 (Magnesium Technology; Vol. 2016-January).Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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TY - CHAP
T1 - Thermodynamic description of reactions between Mg and CaO
AU - Schmid-Fetzer, Rainer
AU - Kozlov, Artem
AU - Wiese, Björn
AU - Mendis, Chamini L.
AU - Tolnai, Domonkos
AU - Kainer, Karl U.
AU - Hort, Norbert
N1 - Conference code: 145
PY - 2016
Y1 - 2016
N2 - CaO is considered as possible replacement for cover gases such as SF6 during melting and casting of Mg alloys. Such CaO additions to molten Mg increase the ignition resistance by forming a protective oxide layer. The actual reactions between liquid Mg and CaO are not well understood. An approach based on chemical reaction equations cannot capture the "CaO dissolution" process. This work presents the development of a consistent thermodynamic description of the ternary Mg-Ca-O alloy system. To that end a revision of the thermodynamic data of key oxides, CaO and MgO, has been performed based on original experimental work so far not considered in thermodynamic databases or tabulations. The formation of a liquid Mg-Ca-[O] alloy during the reaction is predicted from the thermodynamic calculations at melting temperatures; solidification simulations are also performed. These predictions from thermodynamic simulations are validated by experimental data using in situ synchrotron radiation diffraction.
AB - CaO is considered as possible replacement for cover gases such as SF6 during melting and casting of Mg alloys. Such CaO additions to molten Mg increase the ignition resistance by forming a protective oxide layer. The actual reactions between liquid Mg and CaO are not well understood. An approach based on chemical reaction equations cannot capture the "CaO dissolution" process. This work presents the development of a consistent thermodynamic description of the ternary Mg-Ca-O alloy system. To that end a revision of the thermodynamic data of key oxides, CaO and MgO, has been performed based on original experimental work so far not considered in thermodynamic databases or tabulations. The formation of a liquid Mg-Ca-[O] alloy during the reaction is predicted from the thermodynamic calculations at melting temperatures; solidification simulations are also performed. These predictions from thermodynamic simulations are validated by experimental data using in situ synchrotron radiation diffraction.
KW - CaO
KW - In situ XRD
KW - Magnesium alloys
KW - Thermodynamic evaluation
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84975079876&partnerID=8YFLogxK
U2 - 10.1002/9781119274803.ch15
DO - 10.1002/9781119274803.ch15
M3 - Article in conference proceedings
AN - SCOPUS:84975079876
T3 - Magnesium Technology
SP - 67
EP - 72
BT - Magnesium Technology 2016 - Held During TMS 2016
A2 - Singh, Alok
A2 - Solanki, Kiran
A2 - Manuel, Michele Viola
A2 - Neelameggham, Neale R.
PB - The Minerals, Metals & Materials Society
T2 - 145th Annual Meeting and Exhibition of Magnesium Technology - TMS 2016
Y2 - 14 February 2016 through 18 February 2016
ER -