Morphology evolution of Ir-X-Al (X = Nb or Zr) ternary alloys

C. Huang; Y. Yamabe-Mitarai; H. Harada

doi:10.1016/j.matlet.2007.08.032

Morphology evolution of Ir-X-Al (X = Nb or Zr) ternary alloys

C. Huang, Y. Yamabe-Mitarai, H. Harada

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

4 Citations (Scopus)

Abstract

The microstructure evolution of four samples belonging to two Ir-based ternary systems, Ir-Nb-Al and Ir-Zr-Al, has been investigated by microstructure observation using scanning electron microscopy (SEM), phase composition analysis using electron probe microscopy analysis (EPMA) methods, and phase structure determination using X-ray diffraction (XRD) patterns. An fcc/L1₂ two-phase structure was detected in all of the samples. One Ir-Nb-Al alloy with a composition near the Ir side of the phase diagram has been found to exhibit a microstructure similar to that of Ni-based superalloys with cuboidal L1₂-Ir₃Nb precipitates embedded in an fcc-Ir matrix. The lattice misfit between the fcc and L1₂ phases of these samples has been estimated.

Original language	English
Pages (from-to)	1287-1290
Number of pages	4
Journal	Materials Letters
Volume	62
Issue number	8-9
DOIs	https://doi.org/10.1016/j.matlet.2007.08.032
Publication status	Published - 2008 Mar 31
Externally published	Yes

Keywords

Ir-based superalloys
Metals and alloys
Microstructure
fcc/L1 two-phase structure

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2007.08.032

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title = "Morphology evolution of Ir-X-Al (X = Nb or Zr) ternary alloys",

abstract = "The microstructure evolution of four samples belonging to two Ir-based ternary systems, Ir-Nb-Al and Ir-Zr-Al, has been investigated by microstructure observation using scanning electron microscopy (SEM), phase composition analysis using electron probe microscopy analysis (EPMA) methods, and phase structure determination using X-ray diffraction (XRD) patterns. An fcc/L12 two-phase structure was detected in all of the samples. One Ir-Nb-Al alloy with a composition near the Ir side of the phase diagram has been found to exhibit a microstructure similar to that of Ni-based superalloys with cuboidal L12-Ir3Nb precipitates embedded in an fcc-Ir matrix. The lattice misfit between the fcc and L12 phases of these samples has been estimated.",

keywords = "Ir-based superalloys, Metals and alloys, Microstructure, fcc/L1 two-phase structure",

author = "C. Huang and Y. Yamabe-Mitarai and H. Harada",

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doi = "10.1016/j.matlet.2007.08.032",

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TY - JOUR

T1 - Morphology evolution of Ir-X-Al (X = Nb or Zr) ternary alloys

AU - Huang, C.

AU - Yamabe-Mitarai, Y.

AU - Harada, H.

PY - 2008/3/31

Y1 - 2008/3/31

N2 - The microstructure evolution of four samples belonging to two Ir-based ternary systems, Ir-Nb-Al and Ir-Zr-Al, has been investigated by microstructure observation using scanning electron microscopy (SEM), phase composition analysis using electron probe microscopy analysis (EPMA) methods, and phase structure determination using X-ray diffraction (XRD) patterns. An fcc/L12 two-phase structure was detected in all of the samples. One Ir-Nb-Al alloy with a composition near the Ir side of the phase diagram has been found to exhibit a microstructure similar to that of Ni-based superalloys with cuboidal L12-Ir3Nb precipitates embedded in an fcc-Ir matrix. The lattice misfit between the fcc and L12 phases of these samples has been estimated.

AB - The microstructure evolution of four samples belonging to two Ir-based ternary systems, Ir-Nb-Al and Ir-Zr-Al, has been investigated by microstructure observation using scanning electron microscopy (SEM), phase composition analysis using electron probe microscopy analysis (EPMA) methods, and phase structure determination using X-ray diffraction (XRD) patterns. An fcc/L12 two-phase structure was detected in all of the samples. One Ir-Nb-Al alloy with a composition near the Ir side of the phase diagram has been found to exhibit a microstructure similar to that of Ni-based superalloys with cuboidal L12-Ir3Nb precipitates embedded in an fcc-Ir matrix. The lattice misfit between the fcc and L12 phases of these samples has been estimated.

KW - Ir-based superalloys

KW - Metals and alloys

KW - Microstructure

KW - fcc/L1 two-phase structure

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DO - 10.1016/j.matlet.2007.08.032

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JO - Materials Letters

JF - Materials Letters

SN - 0167-577X

IS - 8-9

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Morphology evolution of Ir-X-Al (X = Nb or Zr) ternary alloys

Abstract

Keywords

ASJC Scopus subject areas

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