Experimental investigation and thermodynamic assessment of the Al-Fe system

The heat capacity of ε (Fe5Al8) was determined between 1395 and 1455 K by DSC measurements. The homogeneity ranges of the intermetallic phases ζ (FeAl2), η (Fe2Al5) and θ (Fe4Al13) in the temperature range between 1073 and 1435 K were determined using WDS measurements on annealed and quenched sample...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-04, Vol.743, p.795-811
Main Authors: Zienert, Tilo, Fabrichnaya, Olga
Format: Article
Language:English
Subjects:
A. Intermetallics
Annealing
C. heat capacity
Computer simulation
D. calorimetry
Intermetallic phases
Iron
Liquidus
Measurement
Phase diagrams
Phase transitions
Solidus
Specific heat
Temperature
Thermal analysis
Thermodynamic modelling
Thermodynamics
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Summary:The heat capacity of ε (Fe5Al8) was determined between 1395 and 1455 K by DSC measurements. The homogeneity ranges of the intermetallic phases ζ (FeAl2), η (Fe2Al5) and θ (Fe4Al13) in the temperature range between 1073 and 1435 K were determined using WDS measurements on annealed and quenched samples in the composition range between 56.0 and 75.3 at.% Al. The solidus and liquidus temperatures of all samples were determined using DTA. A CALPHAD-type assessment of the Al-Fe system was done based on latest experimental results on heat capacity of the intermetallic phases. •Heat capacity measurement for Fe5Al8.•Investigation of transition temperatures between 56 and 75.3 at.% Al using DTA.•Determination of the solubility ranges of FeAl2, Fe2Al5 and Fe4Al13 using WDS.•CALPHAD-type assessment of the Al-Fe system based on measured cp of intermetallics.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.01.316