Thermodynamic assessment and experimental study of Mg-Gd alloys
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in: Journal of Alloys and Compounds, Jahrgang 581, 25.12.2013, S. 166-177.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Thermodynamic assessment and experimental study of Mg-Gd alloys
AU - Hampl, M.
AU - Blawert, C.
AU - Silva Campos, M. R.
AU - Hort, N.
AU - Peng, Q.
AU - Kainer, K. U.
AU - Schmid-Fetzer, R.
PY - 2013/12/25
Y1 - 2013/12/25
N2 - The solid solubility of Gd in (Mg) is studied experimentally using microstructure, chemical and EDX analysis on permanent mould chill cast samples which were annealed for 1-14 days at 300-550 °C. Based on those key data and all the critically assessed experimental phase equilibrium and thermodynamic data of the Mg-Gd system two Calphad-type thermodynamic descriptions are developed. This provides calculated phase diagrams, and an inherent inconsistency between the vapor pressure data and the Mg-rich phase diagram is indicated. A previous misperception of ''experimental'' enthalpy of formation data of binary GdxMgy intermetallic compounds is also revealed. The assumption of systematic trends in these key thermodynamic data for the series of rare earth elements R = (La, Ce, Pr, Nd, Sm, Gd) is scrutinized.
AB - The solid solubility of Gd in (Mg) is studied experimentally using microstructure, chemical and EDX analysis on permanent mould chill cast samples which were annealed for 1-14 days at 300-550 °C. Based on those key data and all the critically assessed experimental phase equilibrium and thermodynamic data of the Mg-Gd system two Calphad-type thermodynamic descriptions are developed. This provides calculated phase diagrams, and an inherent inconsistency between the vapor pressure data and the Mg-rich phase diagram is indicated. A previous misperception of ''experimental'' enthalpy of formation data of binary GdxMgy intermetallic compounds is also revealed. The assumption of systematic trends in these key thermodynamic data for the series of rare earth elements R = (La, Ce, Pr, Nd, Sm, Gd) is scrutinized.
KW - Microstructure
KW - Phase diagrams
KW - Rare earth alloys and compounds
KW - Thermodynamic modelling
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84884245010&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2013.07.042
DO - 10.1016/j.jallcom.2013.07.042
M3 - Journal articles
AN - SCOPUS:84884245010
VL - 581
SP - 166
EP - 177
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -