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Platinum Group Metals Base Refractory Superalloys

Published online by Cambridge University Press:  15 February 2011

Y. Yamabe-Mitarai ,
Y. Koizumi ,
H. Murakami ,
Y. Ro ,
T. Maruko  and
H. Harada
Y. Yamabe-Mitarai
Affiliation:
National Research Institute for Metals, 1–2–1 Sengen, Tsukuba, Ibaraki, 305, Japan, [email protected]
Y. Koizumi
Affiliation:
National Research Institute for Metals, 1–2–1 Sengen, Tsukuba, Ibaraki, 305, Japan, [email protected]
H. Murakami
Affiliation:
National Research Institute for Metals, 1–2–1 Sengen, Tsukuba, Ibaraki, 305, Japan, [email protected]
Y. Ro
Affiliation:
National Research Institute for Metals, 1–2–1 Sengen, Tsukuba, Ibaraki, 305, Japan, [email protected]
T. Maruko
Affiliation:
National Research Institute for Metals, 1–2–1 Sengen, Tsukuba, Ibaraki, 305, Japan, [email protected]
H. Harada
Affiliation:
National Research Institute for Metals, 1–2–1 Sengen, Tsukuba, Ibaraki, 305, Japan, [email protected]
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Abstract

Ir- and Rh-base refractory superalloys with an fee and Lb two phase structure similar to Ni-base superalloys, yet with considerably higher melting temperatures have been proposed. Fee and Ll2 two phases were observed in these alloys by transmission electron microscopy and X-ray powder diffractometry. The compression tests of these alloys showed that the strengths of several alloys were about 200 MPa at 1800 °C and these alloys have potential to become ultra-high temperature materials for use in power engineering field.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 701
Copyright
Copyright © Materials Research Society 1997

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References

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