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Oxidation behaviour...
Oxidation behaviour of a Mo(Si,Al)2 based composite at 1500 degrees C
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- Ingemarsson, Linda, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hellström, Kristina M, 1971 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Johansson, Lars-Gunnar, 1952 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Svensson, Jan-Erik, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Halvarsson, Mats, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2011
- 2011
- Engelska.
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Ingår i: Intermetallics. - : Elsevier BV. - 0966-9795. ; 19:9, s. 1319-1329
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- The oxidation of a Mo(Si,Al)(2) composite is investigated at 1500 degrees C in dry air using exposure times from 1 to 1000 h. Cross sections are examined with Scanning Electron Microscopy (SEM) and the phase composition is analyzed by X-ray diffraction (XRD). The material forms a continuous and protective alumina layer, the growth of the alumina layer following parabolic kinetics. Immediately below the scale Mo(Si,Al)(2) is replaced by a Mo(5)(Si,Al)(3) layer due to the flux of aluminum to the scale. The Al concentration in the Mo(Si,Al)(2) phase in the underlying substrate decreases from 27% before exposure to 16-17% after 1000 h. The continuous alumina layer becomes covered by a top layer consisting of alumina grains embedded in a viscous melt with approximate composition 7 Na(2)O-15 Al(2)O(3)-78 SiO(2). With time, sodium is volatilized from the melt and the top scale layer transforms to a mixture of alumina, mullite and silica melt.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- Multiphase intermetallics
- Microstructure
- v7
- Molybdenum silicides
- mosi2
- molybdenum
- resistance
- Electron microscopy
- al
- 1992
- intermediate
- p2747
- kamey cg
- (mo
- disilicide
- silicides
- high-temperature oxidation
- w)si-2-based composite
- atmospheres
- Oxidation
- scanning
- intermetallic alloys
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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