A directionally solidified Ni-base eutectic alloy reinforced by a mixed hafnium-zirconium monocarbide
| ISSN: |
1573-4803
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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| Notes: |
Abstract The nickel-base eutectic alloy (Ni-10Cr-5Al-5Cr-8. 3Hf-1. 1Zr-0.7C, NASA HAFNIC-10) was directionally solidified to produce aligned refractory monocarbides in a nickel-rich matrix. The aligned carbides, (Hf, Zr) C, were present as rod- and ribbontypes, with a volume loading of about 8%. A blocky type of Ni3Al (γ′) precipitate, about 45% volume loading, was produced in the nickel-base matrix. The growth direction of both aligned carbide and matrix was parallel to 〈1 0 0〉. The effect of thermal cycling between 425 and 1100° C using a 2.5 min cycle time was examined. No microstructural degradation of the aligned carbide fibres occurred after 2000 cycles.
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| Type of Medium: |
Electronic Resource
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| URL: |