Observation of a metastable aluminide ThFe2Al10

T. Ganigar; A. Venkert; M. Talianker

doi:10.1016/j.intermet.2012.09.004

Observation of a metastable aluminide ThFe₂Al₁₀

T. Ganigar, A. Venkert, M. Talianker

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Metastable ThFe₂Al₁₀ ternary aluminide was observed in the as-cast Al-6.1at.%Th-6.1at.%Fe alloy. It crystallizes into an orthorhombic structure belonging to Pmmn space group symmetry and possesses unit cell with parameters a = 9.076 Å b = 8.998 Å and c = 5.031 Å. The ThFe₂Al₁₀ (Pmmn) phase can be considered as a metastable state of the equilibrium ThFe₂Al₁₀ (Cmcm) compound; its formation should be directly related to the cooling rate of the alloy during casting. After annealing the as-cast alloy at 600 °C for one week the metastable ThFe₂Al₁₀ (Pmmn) phase decomposes: the particles of this phase are no longer observed in SEM, and the diffraction peaks associated with this phase disappear in the XRD pattern.

Original language	English
Pages (from-to)	133-137
Number of pages	5
Journal	Intermetallics
Volume	36
DOIs	https://doi.org/10.1016/j.intermet.2012.09.004
State	Published - 1 May 2013

Keywords

A. Aluminides
A. Intermetallics
B. Crystallography
F. Diffraction
F. Electron microscopy, transmission

ASJC Scopus subject areas

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.intermet.2012.09.004

Cite this

@article{ec6d98050a16483b96f3f0901224e984,

title = "Observation of a metastable aluminide ThFe2Al10",

abstract = "Metastable ThFe2Al10 ternary aluminide was observed in the as-cast Al-6.1at.\%Th-6.1at.\%Fe alloy. It crystallizes into an orthorhombic structure belonging to Pmmn space group symmetry and possesses unit cell with parameters a = 9.076 {\AA} b = 8.998 {\AA} and c = 5.031 {\AA}. The ThFe2Al10 (Pmmn) phase can be considered as a metastable state of the equilibrium ThFe2Al10 (Cmcm) compound; its formation should be directly related to the cooling rate of the alloy during casting. After annealing the as-cast alloy at 600 °C for one week the metastable ThFe2Al10 (Pmmn) phase decomposes: the particles of this phase are no longer observed in SEM, and the diffraction peaks associated with this phase disappear in the XRD pattern.",

keywords = "A. Aluminides, A. Intermetallics, B. Crystallography, F. Diffraction, F. Electron microscopy, transmission",

author = "T. Ganigar and A. Venkert and M. Talianker",

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year = "2013",

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doi = "10.1016/j.intermet.2012.09.004",

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T1 - Observation of a metastable aluminide ThFe2Al10

AU - Ganigar, T.

AU - Venkert, A.

AU - Talianker, M.

PY - 2013/5/1

Y1 - 2013/5/1

N2 - Metastable ThFe2Al10 ternary aluminide was observed in the as-cast Al-6.1at.%Th-6.1at.%Fe alloy. It crystallizes into an orthorhombic structure belonging to Pmmn space group symmetry and possesses unit cell with parameters a = 9.076 Å b = 8.998 Å and c = 5.031 Å. The ThFe2Al10 (Pmmn) phase can be considered as a metastable state of the equilibrium ThFe2Al10 (Cmcm) compound; its formation should be directly related to the cooling rate of the alloy during casting. After annealing the as-cast alloy at 600 °C for one week the metastable ThFe2Al10 (Pmmn) phase decomposes: the particles of this phase are no longer observed in SEM, and the diffraction peaks associated with this phase disappear in the XRD pattern.

AB - Metastable ThFe2Al10 ternary aluminide was observed in the as-cast Al-6.1at.%Th-6.1at.%Fe alloy. It crystallizes into an orthorhombic structure belonging to Pmmn space group symmetry and possesses unit cell with parameters a = 9.076 Å b = 8.998 Å and c = 5.031 Å. The ThFe2Al10 (Pmmn) phase can be considered as a metastable state of the equilibrium ThFe2Al10 (Cmcm) compound; its formation should be directly related to the cooling rate of the alloy during casting. After annealing the as-cast alloy at 600 °C for one week the metastable ThFe2Al10 (Pmmn) phase decomposes: the particles of this phase are no longer observed in SEM, and the diffraction peaks associated with this phase disappear in the XRD pattern.

KW - A. Aluminides

KW - A. Intermetallics

KW - B. Crystallography

KW - F. Diffraction

KW - F. Electron microscopy, transmission

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