Revisiting the revised Ag-Pt phase diagram

Gus L. W. Hart; Lance J. Nelson; Richard R. Vanfleet; Branton J. Campbell; Marcel H. F. Sluiter; Jan H. Neethling; Ezra J. Olivier; Soraya Allies; Candace I. Lang; Bryce Meredig; Christopher Wolverton

doi:10.1016/j.actamat.2016.10.053

Revisiting the revised Ag-Pt phase diagram

Gus L. W. Hart, Lance J. Nelson, Richard R. Vanfleet, Branton J. Campbell, Marcel H. F. Sluiter, Jan H. Neethling, Ezra J. Olivier, Soraya Allies, Candace I. Lang, Bryce Meredig, Christopher Wolverton

School of Engineering

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

32 Citations (Scopus)

Abstract

Because of the important applications of platinum alloys and related platinum-group-metals phases, complete phase diagrams for these systems are important for materials engineering. The currently accepted phase diagram for the Ag-Pt system is questionable because of its disagreement with earlier experiments and because of its claim for a lone ordered structure at 53%-Pt which was not characterized and which contradicts both computational predictions and analogy to the isoelectronic system Cu-Pt. A complete re-examination of the Ag-Pt system by computational and experimental means suggests a phase diagram similar to the isoelectronic system Cu-Pt. The unknown compound, claimed to be 53%-Pt, is found to be the L1₁ structure at 50%-Pt.

Original language	English
Pages (from-to)	325-332
Number of pages	8
Journal	Acta Materialia
Volume	124
DOIs	https://doi.org/10.1016/j.actamat.2016.10.053
Publication status	Published - 2017

Keywords

Platinum alloys
Cluster expansion
Phase diagrams
Ag-Pt

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10.1016/j.actamat.2016.10.053

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title = "Revisiting the revised Ag-Pt phase diagram",

abstract = "Because of the important applications of platinum alloys and related platinum-group-metals phases, complete phase diagrams for these systems are important for materials engineering. The currently accepted phase diagram for the Ag-Pt system is questionable because of its disagreement with earlier experiments and because of its claim for a lone ordered structure at 53%-Pt which was not characterized and which contradicts both computational predictions and analogy to the isoelectronic system Cu-Pt. A complete re-examination of the Ag-Pt system by computational and experimental means suggests a phase diagram similar to the isoelectronic system Cu-Pt. The unknown compound, claimed to be 53%-Pt, is found to be the L11 structure at 50%-Pt.",

keywords = "Platinum alloys, Cluster expansion, Phase diagrams, Ag-Pt",

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T1 - Revisiting the revised Ag-Pt phase diagram

AU - Hart, Gus L. W.

AU - Nelson, Lance J.

AU - Vanfleet, Richard R.

AU - Campbell, Branton J.

AU - Sluiter, Marcel H. F.

AU - Neethling, Jan H.

AU - Olivier, Ezra J.

AU - Allies, Soraya

AU - Lang, Candace I.

AU - Meredig, Bryce

AU - Wolverton, Christopher

PY - 2017

Y1 - 2017

N2 - Because of the important applications of platinum alloys and related platinum-group-metals phases, complete phase diagrams for these systems are important for materials engineering. The currently accepted phase diagram for the Ag-Pt system is questionable because of its disagreement with earlier experiments and because of its claim for a lone ordered structure at 53%-Pt which was not characterized and which contradicts both computational predictions and analogy to the isoelectronic system Cu-Pt. A complete re-examination of the Ag-Pt system by computational and experimental means suggests a phase diagram similar to the isoelectronic system Cu-Pt. The unknown compound, claimed to be 53%-Pt, is found to be the L11 structure at 50%-Pt.

AB - Because of the important applications of platinum alloys and related platinum-group-metals phases, complete phase diagrams for these systems are important for materials engineering. The currently accepted phase diagram for the Ag-Pt system is questionable because of its disagreement with earlier experiments and because of its claim for a lone ordered structure at 53%-Pt which was not characterized and which contradicts both computational predictions and analogy to the isoelectronic system Cu-Pt. A complete re-examination of the Ag-Pt system by computational and experimental means suggests a phase diagram similar to the isoelectronic system Cu-Pt. The unknown compound, claimed to be 53%-Pt, is found to be the L11 structure at 50%-Pt.

KW - Platinum alloys

KW - Cluster expansion

KW - Phase diagrams

KW - Ag-Pt

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DO - 10.1016/j.actamat.2016.10.053

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VL - 124

SP - 325

EP - 332

JO - Acta Materialia

JF - Acta Materialia

ER -

Revisiting the revised Ag-Pt phase diagram

Abstract

Keywords

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