Characterization of new aluminides found in the ThT2Al20 alloys (where T = Ti, V, Mn)

Avraham I. Bram; Arie Venkert; Louisa Meshi

doi:10.1016/j.jallcom.2015.03.247

Characterization of new aluminides found in the ThT₂Al₂₀ alloys (where T = Ti, V, Mn)

Avraham I. Bram, Arie Venkert, Louisa Meshi

Department of Materials Engineering

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

18 Scopus citations

Abstract

Abstract During the investigations on the Al-rich corner of the Th-T-Al system (where T = Ti, V, Mn), new intermetallic phases were revealed: ternary ThV₂Al₂₀, ThTi₂Al₂₀, ThMn₂Al₁₀ and pseudo-binary Th₃Al₁₁ (containing traces of vanadium). Their structure was investigated by means of Transmission Electron Microscopy and powder X-ray diffraction methods. Refinement of these structures was performed applying Rietveld analysis on X-ray diffraction data. It was established that ThV₂Al₂₀ and ThTi₂Al₂₀ phases can be ascribed to the CeCr₂Al₂₀ structure type, while ThMn₂Al₁₀ possesses the YbFe₂Al₁₀-type structure. The pseudo-binary (Th₁_-_xV_x)₃Al₁₁ phase was found to be orthorhombic (Immm; a = 4.4354(8) Å, b = 13.8394(9) Å and c = 10.3486(5) Å), isostructural to La₃Al₁₁. It was proposed that metastable Th₃Al₁₁ phase can be stabilized by small amount of vanadium, which was found in its content.

Original language	English
Article number	33884
Pages (from-to)	1-6
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	641
DOIs	https://doi.org/10.1016/j.jallcom.2015.03.247
State	Published - 25 Aug 2015

Keywords

Aluminides
Powder X-ray diffraction
Structure solution
TEM

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2015.03.247

Cite this

@article{1032397039ea4546844acaa580c21cfb,

title = "Characterization of new aluminides found in the ThT2Al20 alloys (where T = Ti, V, Mn)",

abstract = "Abstract During the investigations on the Al-rich corner of the Th-T-Al system (where T = Ti, V, Mn), new intermetallic phases were revealed: ternary ThV2Al20, ThTi2Al20, ThMn2Al10 and pseudo-binary Th3Al11 (containing traces of vanadium). Their structure was investigated by means of Transmission Electron Microscopy and powder X-ray diffraction methods. Refinement of these structures was performed applying Rietveld analysis on X-ray diffraction data. It was established that ThV2Al20 and ThTi2Al20 phases can be ascribed to the CeCr2Al20 structure type, while ThMn2Al10 possesses the YbFe2Al10-type structure. The pseudo-binary (Th1-xVx)3Al11 phase was found to be orthorhombic (Immm; a = 4.4354(8) {\AA}, b = 13.8394(9) {\AA} and c = 10.3486(5) {\AA}), isostructural to La3Al11. It was proposed that metastable Th3Al11 phase can be stabilized by small amount of vanadium, which was found in its content.",

keywords = "Aluminides, Powder X-ray diffraction, Structure solution, TEM",

author = "Bram, {Avraham I.} and Arie Venkert and Louisa Meshi",

year = "2015",

month = aug,

day = "25",

doi = "10.1016/j.jallcom.2015.03.247",

language = "English",

volume = "641",

pages = "1--6",

journal = "Journal of Alloys and Compounds",

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T1 - Characterization of new aluminides found in the ThT2Al20 alloys (where T = Ti, V, Mn)

AU - Bram, Avraham I.

AU - Venkert, Arie

AU - Meshi, Louisa

PY - 2015/8/25

Y1 - 2015/8/25

N2 - Abstract During the investigations on the Al-rich corner of the Th-T-Al system (where T = Ti, V, Mn), new intermetallic phases were revealed: ternary ThV2Al20, ThTi2Al20, ThMn2Al10 and pseudo-binary Th3Al11 (containing traces of vanadium). Their structure was investigated by means of Transmission Electron Microscopy and powder X-ray diffraction methods. Refinement of these structures was performed applying Rietveld analysis on X-ray diffraction data. It was established that ThV2Al20 and ThTi2Al20 phases can be ascribed to the CeCr2Al20 structure type, while ThMn2Al10 possesses the YbFe2Al10-type structure. The pseudo-binary (Th1-xVx)3Al11 phase was found to be orthorhombic (Immm; a = 4.4354(8) Å, b = 13.8394(9) Å and c = 10.3486(5) Å), isostructural to La3Al11. It was proposed that metastable Th3Al11 phase can be stabilized by small amount of vanadium, which was found in its content.

AB - Abstract During the investigations on the Al-rich corner of the Th-T-Al system (where T = Ti, V, Mn), new intermetallic phases were revealed: ternary ThV2Al20, ThTi2Al20, ThMn2Al10 and pseudo-binary Th3Al11 (containing traces of vanadium). Their structure was investigated by means of Transmission Electron Microscopy and powder X-ray diffraction methods. Refinement of these structures was performed applying Rietveld analysis on X-ray diffraction data. It was established that ThV2Al20 and ThTi2Al20 phases can be ascribed to the CeCr2Al20 structure type, while ThMn2Al10 possesses the YbFe2Al10-type structure. The pseudo-binary (Th1-xVx)3Al11 phase was found to be orthorhombic (Immm; a = 4.4354(8) Å, b = 13.8394(9) Å and c = 10.3486(5) Å), isostructural to La3Al11. It was proposed that metastable Th3Al11 phase can be stabilized by small amount of vanadium, which was found in its content.

KW - Aluminides

KW - Powder X-ray diffraction

KW - Structure solution

KW - TEM

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