Microstructure Control of Co3AlC-Base Heat Resistant Alloys Using Optical Floating Zone Melting

Yoshisato Kimura; Kiichi Sakai; Shinya Teramoto; Yoshinao Mishima

doi:10.4028/www.scientific.net/MSF.475-479.833

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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Microstructure Control of Co3AlC-Base Heat...

Microstructure Control of Co₃AlC-Base Heat Resistant Alloys Using Optical Floating Zone Melting

Abstract:

Aiming for further improvement of mechanical properties of Co3AlC-based heat resistant alloys, microstructure control was conducted using optical floating zone (OFZ) melting. Unidirectional solidification was performed to align Co3AlC/a(Co) two-phase eutectic microstructure. Co3AlC single phase poly-crystal alloys were successfully fabricated for the first time by taking advantage of OFZ. Mechanical properties were evaluated for selected alloys by compression tests at ambient temperature, 1073 K and 1273 K. Excellent elevated temperature strength is achieved in Co3AlC single phase alloys and ductility is sufficiently improved in Co3AlC/a(Co) two-phase alloys.

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Materials Science Forum (Volumes 475-479)

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833-836

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https://doi.org/10.4028/www.scientific.net/MSF.475-479.833

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Online since:

January 2005

Authors:

Yoshisato Kimura, Kiichi Sakai, Shinya Teramoto, Yoshinao Mishima

Keywords:

Ductility Improvement, E2₁ Type Co₃AlC, Microstructure Control, Phase Equilibria, Unidirectional Solidification

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References

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