Oxidation of molybdenum-chromium-palladium alloys

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Oxidation of Metals; (United States)

DOI:https://doi.org/10.1007/BF00664337· OSTI ID:5412466

Lee, Dongbok ^[1]; Simkovich, G ^[2]

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1. Korea Advanced Energy Research Institute, Daejeon (South Korea)
2. Pennsylvania State Univ., University Park (USA)

Isothermal and cyclic oxidation studies have been carried out on (80-90) wt.% Mo-(8-17) wt.% Cr-(0.5-3) wt.% Pd alloys in atmospheres of both air and pure oxygen at temperatures between 1,000 and 1,250{degree}C. The Pd additions decreased the oxidation rate with the most pronounced effect being observed for an alloy of 80 wt.% Mo-17 wt.% Cr-3 wt.% Pd. Palladium played a major role in providing the necessary oxidation protection by accelerating the formation of Cr{sub 2}O{sub 3} layers at low Cr concentrations. Contrary to the behavior of most metals, an increase in oxidation resistance with increase in temperature was observed. Although the alloy systems were not truly oxidation resistant, definite improvement in oxidation resistance was achieved. The oxidation mechanism of Mo-Cr-Pd alloys is described.

• OSTI ID: 5412466
• Journal Information: Oxidation of Metals; (United States), Journal Name: Oxidation of Metals; (United States) Vol. 34:1-2; ISSN 0030-770X; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
AIR
ALLOYS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
CORROSION RESISTANCE
DENSITY
DIFFUSION
ELECTRON MICROSCOPY
ELEMENTS
FLUIDS
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
KINETICS
MATERIALS
METALLURGICAL EFFECTS
METALLURGY
MICROSCOPY
MOLYBDENUM ALLOYS
MOLYBDENUM BASE ALLOYS
NONMETALS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PALLADIUM ADDITIONS
PALLADIUM ALLOYS
PARTICLE SIZE
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
POWDER METALLURGY
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SIZE
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
WEIGHT