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
AN - SCOPUS:64549121169
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 -