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

^*Corresponding author for this work

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

33 Citations (SciVal)

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
Journal	Acta Materialia
Volume	124
DOIs	https://doi.org/10.1016/j.actamat.2016.10.053
Publication status	Published - 2017

Keywords

Ag-Pt
Cluster expansion
Phase diagrams
Platinum alloys

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

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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 - Ag-Pt

KW - Cluster expansion

KW - Phase diagrams

KW - Platinum alloys

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DO - 10.1016/j.actamat.2016.10.053

M3 - Article

AN - SCOPUS:84995553607

SN - 1359-6454

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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