Investigation of the Superlattice Phases Formed in Ta72Ru28

Alexander Carruthers; Bradley A. Young; Ed Pickering

doi:10.3390/ma16020720

Investigation of the Superlattice Phases Formed in Ta72Ru28

Alexander Carruthers, Bradley A. Young, Ed Pickering

Materials Engineering

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

Abstract

The Ta-Ru binary phase diagram has not been fully investigated, but shows potential for a two-phase region of A2+B2. Given the high melting points of both Ta and Ru, such an alloy would have the potential for high temperature strength. A Ta72Ru28 alloy was arc melted and investigated in the as-cast and aged (at 1000 °C) states. The as cast alloy was composed of A2 and B2, albeit not in a superalloy-like morphology. A third phase was found in the aged alloy, which has not been reported before, and which is also a coherent superlattice phase of the Ta BCC matrix. The structure of this phase was found to be consistent with the tetragonal Cr2Al prototype structure, with lattice parameters of (a, a, 3a), where a is the Ta BCC lattice parameter.

Original language	English
Article number	720
Journal	Materials
Volume	16
Issue number	2
DOIs	https://doi.org/10.3390/ma16020720
Publication status	Published - 11 Jan 2023

Keywords

tantalum
refractory superalloy
ruthenium
coherent intermetalics

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title = "Investigation of the Superlattice Phases Formed in Ta72Ru28",

abstract = "The Ta-Ru binary phase diagram has not been fully investigated, but shows potential for a two-phase region of A2+B2. Given the high melting points of both Ta and Ru, such an alloy would have the potential for high temperature strength. A Ta72Ru28 alloy was arc melted and investigated in the as-cast and aged (at 1000 °C) states. The as cast alloy was composed of A2 and B2, albeit not in a superalloy-like morphology. A third phase was found in the aged alloy, which has not been reported before, and which is also a coherent superlattice phase of the Ta BCC matrix. The structure of this phase was found to be consistent with the tetragonal Cr2Al prototype structure, with lattice parameters of (a, a, 3a), where a is the Ta BCC lattice parameter.",

keywords = "tantalum, refractory superalloy, ruthenium, coherent intermetalics",

author = "Alexander Carruthers and Young, {Bradley A.} and Ed Pickering",

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T1 - Investigation of the Superlattice Phases Formed in Ta72Ru28

AU - Carruthers, Alexander

AU - Young, Bradley A.

AU - Pickering, Ed

PY - 2023/1/11

Y1 - 2023/1/11

N2 - The Ta-Ru binary phase diagram has not been fully investigated, but shows potential for a two-phase region of A2+B2. Given the high melting points of both Ta and Ru, such an alloy would have the potential for high temperature strength. A Ta72Ru28 alloy was arc melted and investigated in the as-cast and aged (at 1000 °C) states. The as cast alloy was composed of A2 and B2, albeit not in a superalloy-like morphology. A third phase was found in the aged alloy, which has not been reported before, and which is also a coherent superlattice phase of the Ta BCC matrix. The structure of this phase was found to be consistent with the tetragonal Cr2Al prototype structure, with lattice parameters of (a, a, 3a), where a is the Ta BCC lattice parameter.

AB - The Ta-Ru binary phase diagram has not been fully investigated, but shows potential for a two-phase region of A2+B2. Given the high melting points of both Ta and Ru, such an alloy would have the potential for high temperature strength. A Ta72Ru28 alloy was arc melted and investigated in the as-cast and aged (at 1000 °C) states. The as cast alloy was composed of A2 and B2, albeit not in a superalloy-like morphology. A third phase was found in the aged alloy, which has not been reported before, and which is also a coherent superlattice phase of the Ta BCC matrix. The structure of this phase was found to be consistent with the tetragonal Cr2Al prototype structure, with lattice parameters of (a, a, 3a), where a is the Ta BCC lattice parameter.

KW - tantalum

KW - refractory superalloy

KW - ruthenium

KW - coherent intermetalics

U2 - 10.3390/ma16020720

DO - 10.3390/ma16020720

M3 - Article

SN - 1996-1944

VL - 16

JO - Materials

JF - Materials

IS - 2

M1 - 720

ER -

Investigation of the Superlattice Phases Formed in Ta72Ru28

Abstract

Keywords

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