Oxidation of molybdenum-tungsten-chromium-silicon alloys

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Oxid. Met.; (United States)

DOI:https://doi.org/10.1007/BF00846689· OSTI ID:5846793

Lee, D B; Simkovich, G

The oxidation kinetics of (50-60) wt.% Mo-(35-47) wt.% Cr-(2-5) wt.% Si and (30-40) wt.% Mo-(30-40) wt.% W-(27-37) wt.% Cr-(0-3) wt.% Si alloys were studied between 1,000 and 1,200/degree/C in a pure oxygen atmosphere. The oxidation of Mo-W-Cr-Si alloys resembled that of Mo-Cr-Si alloys but was much more oxidation resistant. In general, oxidation resistance increased with increasing Cr and Si content. Alloys with good oxidation behavior had a thin outer Cr/sub 2/O/sub 3/ layer and an internal oxidation zone (in both Mo and Mo-W alloys). Alloys displaying poor oxidation behavior had a porous Cr/sub 2/O/sub 3/ layer (in Mo alloys) or layers of oxides of W and Cr (in Mo-W alloys). Although the alloy systems were not truly oxidation resistant, definite improvement in oxidation resistance was achieved.

• Research Organization: Korea Advanced Energy Research Institute, Chungnam
• OSTI ID: 5846793
• Journal Information: Oxid. Met.; (United States), Journal Name: Oxid. Met.; (United States) Vol. 31:3-4; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALLOYS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COMPARATIVE EVALUATIONS
CORROSION RESISTANCE
CRYSTAL STRUCTURE
DIFFUSION
ELECTRON MICROSCOPY
ELEMENTS
GRAVIMETRIC ANALYSIS
KINETICS
METALLURGICAL EFFECTS
MICROSCOPY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NONMETALS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POROSITY
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SILICON ALLOYS
SILICON COMPOUNDS
SILICON OXIDES
TEMPERATURE EFFECTS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN ALLOYS
VERY HIGH TEMPERATURE