High-temperature oxidation of Cr-Cr sub 2 Nb alloys
The high-temperature oxidation of Cr-Cr{sub 2}Nb alloys is being studied as part of a program to develop ductile, corrosion-resistant versions of this very-high-strength material. The kinetics, scale development, and spallation tendencies of Cr {minus}6 and {minus}12 at. % Nb alloys oxidized in air at 900 and 950{degrees}C were characterized. The alloy with the higher niobium content performed significantly better in terms of overall weight gain and resistance to spallation. This behavior is ascribed to an increased volume fraction of the Cr{sub 2}Nb-Cr eutectic mixture at the expense of the Cr-rich phase. The study suggested some general approaches to improving the oxidation resistance of Cr-Nb alloys.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5285714
- Report Number(s):
- CONF-9205123-2; ON: DE92014831
- Country of Publication:
- United States
- Language:
- English
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