Nanometer-scale solute clustering in aluminum-nickel-ytterbium metallic glasses

Dieter Isheim; David N. Seidman; John H. Perepezko; Gregory B. Olson

doi:10.1016/S0921-5093(02)00674-3

Nanometer-scale solute clustering in aluminum-nickel-ytterbium metallic glasses

Dieter Isheim^*, David N. Seidman, John H. Perepezko, Gregory B. Olson

^*Corresponding author for this work

Materials Science and Engineering

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

8 Scopus citations

Abstract

The transformation sequence of melt-spun Al-5.2at.% Ni-6.8at.% Yb is characterized by X-ray diffraction, differential scanning calorimetry (DSC), and atom-probe field-ion microscopy. An isochronal DSC thermogram detects three major exothermic transformation steps, with onset temperatures of 180, 292, and 327°C, respectively. Atom-probe analyses reveal the evolution of compositional inhomogeneities on an atomic scale. In addition to Ni-clusters present in the as-quenched alloy, Ni-Yb co-clusters form during isochronal heating to 188°C. Al-rich precipitates are detected after heating to 250°C, with the Ni and Ni-Yb clusters still present, constituting possible precursors of intermetallic phases formed during advanced transformation stages.

Original language	English (US)
Pages (from-to)	99-104
Number of pages	6
Journal	Materials Science and Engineering A
Volume	353
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(02)00674-3
State	Published - Jul 25 2003

Keywords

Aluminum-nickel-ytterbium alloy
Amorphous and partially crystallized material
Clustering

ASJC Scopus subject areas

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

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title = "Nanometer-scale solute clustering in aluminum-nickel-ytterbium metallic glasses",

abstract = "The transformation sequence of melt-spun Al-5.2at.% Ni-6.8at.% Yb is characterized by X-ray diffraction, differential scanning calorimetry (DSC), and atom-probe field-ion microscopy. An isochronal DSC thermogram detects three major exothermic transformation steps, with onset temperatures of 180, 292, and 327°C, respectively. Atom-probe analyses reveal the evolution of compositional inhomogeneities on an atomic scale. In addition to Ni-clusters present in the as-quenched alloy, Ni-Yb co-clusters form during isochronal heating to 188°C. Al-rich precipitates are detected after heating to 250°C, with the Ni and Ni-Yb clusters still present, constituting possible precursors of intermetallic phases formed during advanced transformation stages.",

keywords = "Aluminum-nickel-ytterbium alloy, Amorphous and partially crystallized material, Clustering",

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T1 - Nanometer-scale solute clustering in aluminum-nickel-ytterbium metallic glasses

AU - Isheim, Dieter

AU - Seidman, David N.

AU - Perepezko, John H.

AU - Olson, Gregory B.

PY - 2003/7/25

Y1 - 2003/7/25

N2 - The transformation sequence of melt-spun Al-5.2at.% Ni-6.8at.% Yb is characterized by X-ray diffraction, differential scanning calorimetry (DSC), and atom-probe field-ion microscopy. An isochronal DSC thermogram detects three major exothermic transformation steps, with onset temperatures of 180, 292, and 327°C, respectively. Atom-probe analyses reveal the evolution of compositional inhomogeneities on an atomic scale. In addition to Ni-clusters present in the as-quenched alloy, Ni-Yb co-clusters form during isochronal heating to 188°C. Al-rich precipitates are detected after heating to 250°C, with the Ni and Ni-Yb clusters still present, constituting possible precursors of intermetallic phases formed during advanced transformation stages.

AB - The transformation sequence of melt-spun Al-5.2at.% Ni-6.8at.% Yb is characterized by X-ray diffraction, differential scanning calorimetry (DSC), and atom-probe field-ion microscopy. An isochronal DSC thermogram detects three major exothermic transformation steps, with onset temperatures of 180, 292, and 327°C, respectively. Atom-probe analyses reveal the evolution of compositional inhomogeneities on an atomic scale. In addition to Ni-clusters present in the as-quenched alloy, Ni-Yb co-clusters form during isochronal heating to 188°C. Al-rich precipitates are detected after heating to 250°C, with the Ni and Ni-Yb clusters still present, constituting possible precursors of intermetallic phases formed during advanced transformation stages.

KW - Aluminum-nickel-ytterbium alloy

KW - Amorphous and partially crystallized material

KW - Clustering

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