Phase equilibria and oxidation behavior of Ir-rich Ir-Y binary alloys

Nobuaki Sekido, Hideyuki Murakami, Yoko Yamabe-Mitarai

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The phase equilibria and oxidation behavior of Ir-Y binary alloys have been investigated. A phase diagram at the Ir-rich end in the Ir-Y binary system has been proposed on the basis of experimental results. Iridium is found to dissolve little Y in the FCC solid solution. The pure-Ir and Ir-Y binary alloys exhibit severe weight loss upon air-exposure at 1373 K with elapsed time. Protective oxide layers are not formed on the surface of the alloys with Y up to, at least, 20 at.%. The kinetics of the oxidation is controlled by the formation and sublimation of Ir oxides at the surface.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalJournal of Alloys and Compounds
Volume476
Issue number1-2
DOIs
Publication statusPublished - 2009 May 12
Externally publishedYes

Fingerprint

Binary alloys
Phase equilibria
Oxides
Iridium
Oxidation
Sublimation
Phase diagrams
Solid solutions
Kinetics
Air

Keywords

  • High temperature alloys
  • Oxidation
  • Phase diagrams
  • Rare earth alloys and compounds

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Phase equilibria and oxidation behavior of Ir-rich Ir-Y binary alloys. / Sekido, Nobuaki; Murakami, Hideyuki; Yamabe-Mitarai, Yoko.

In: Journal of Alloys and Compounds, Vol. 476, No. 1-2, 12.05.2009, p. 107-112.

Research output: Contribution to journalArticle

Sekido, Nobuaki ; Murakami, Hideyuki ; Yamabe-Mitarai, Yoko. / Phase equilibria and oxidation behavior of Ir-rich Ir-Y binary alloys. In: Journal of Alloys and Compounds. 2009 ; Vol. 476, No. 1-2. pp. 107-112.
@article{71c7796c4ab948c0bb2cc37041bbdb3f,
title = "Phase equilibria and oxidation behavior of Ir-rich Ir-Y binary alloys",
abstract = "The phase equilibria and oxidation behavior of Ir-Y binary alloys have been investigated. A phase diagram at the Ir-rich end in the Ir-Y binary system has been proposed on the basis of experimental results. Iridium is found to dissolve little Y in the FCC solid solution. The pure-Ir and Ir-Y binary alloys exhibit severe weight loss upon air-exposure at 1373 K with elapsed time. Protective oxide layers are not formed on the surface of the alloys with Y up to, at least, 20 at.{\%}. The kinetics of the oxidation is controlled by the formation and sublimation of Ir oxides at the surface.",
keywords = "High temperature alloys, Oxidation, Phase diagrams, Rare earth alloys and compounds",
author = "Nobuaki Sekido and Hideyuki Murakami and Yoko Yamabe-Mitarai",
year = "2009",
month = "5",
day = "12",
doi = "10.1016/j.jallcom.2008.08.058",
language = "English",
volume = "476",
pages = "107--112",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "1-2",

}

TY - JOUR

T1 - Phase equilibria and oxidation behavior of Ir-rich Ir-Y binary alloys

AU - Sekido, Nobuaki

AU - Murakami, Hideyuki

AU - Yamabe-Mitarai, Yoko

PY - 2009/5/12

Y1 - 2009/5/12

N2 - The phase equilibria and oxidation behavior of Ir-Y binary alloys have been investigated. A phase diagram at the Ir-rich end in the Ir-Y binary system has been proposed on the basis of experimental results. Iridium is found to dissolve little Y in the FCC solid solution. The pure-Ir and Ir-Y binary alloys exhibit severe weight loss upon air-exposure at 1373 K with elapsed time. Protective oxide layers are not formed on the surface of the alloys with Y up to, at least, 20 at.%. The kinetics of the oxidation is controlled by the formation and sublimation of Ir oxides at the surface.

AB - The phase equilibria and oxidation behavior of Ir-Y binary alloys have been investigated. A phase diagram at the Ir-rich end in the Ir-Y binary system has been proposed on the basis of experimental results. Iridium is found to dissolve little Y in the FCC solid solution. The pure-Ir and Ir-Y binary alloys exhibit severe weight loss upon air-exposure at 1373 K with elapsed time. Protective oxide layers are not formed on the surface of the alloys with Y up to, at least, 20 at.%. The kinetics of the oxidation is controlled by the formation and sublimation of Ir oxides at the surface.

KW - High temperature alloys

KW - Oxidation

KW - Phase diagrams

KW - Rare earth alloys and compounds

UR - http://www.scopus.com/inward/record.url?scp=64549121169&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=64549121169&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2008.08.058

DO - 10.1016/j.jallcom.2008.08.058

M3 - Article

VL - 476

SP - 107

EP - 112

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - 1-2

ER -