Oxidation of Fe-25Cr-4Al-Pd and Fe-25Cr-4Al-Ru alloys
- City Polytechnic of Hong Kong, Kowloon (Hong Kong)
Fe-25Cr-4Al alloys containing Pd and Ru additions were oxidized in air at 1090C. Scanning electron microscopy, dispersive x-ray analyses, and x-ray mapping were used to characterize the morphologies of the scales formed on these alloys. The results showed that Pd tended to segregate at the oxide-alloy interface as discrete and platelike particles during elevated temperature oxidation of the Pd-containing Fe-Cr-Al alloys. These Pd particles appeared to improve the adherence of the alumina scale. However, no improvement of the scale adherence of Ru-containing Fe-Cr-Al alloys was observed as outward diffusion of Ru cations to the external alumina scale led to the formation of RuO[sub 2] within this scale.
- OSTI ID:
- 6136051
- Journal Information:
- Materials Characterization; (United States), Journal Name: Materials Characterization; (United States) Vol. 30:4; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
AIR
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION PRODUCTS
ELECTRON MICROSCOPY
ELEMENTS
FLUIDS
GASES
IRON ALLOYS
IRON BASE ALLOYS
METALLURGICAL EFFECTS
METALS
MICROSCOPY
MORPHOLOGY
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PALLADIUM ADDITIONS
PALLADIUM ALLOYS
PLATINUM METAL ALLOYS
PLATINUM METALS
REFRACTORY METAL COMPOUNDS
RUTHENIUM
RUTHENIUM ADDITIONS
RUTHENIUM ALLOYS
RUTHENIUM COMPOUNDS
RUTHENIUM OXIDES
SCANNING ELECTRON MICROSCOPY
SEGREGATION
SPECTROSCOPY
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY