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Microstructural inv...
Microstructural investigation of the initial oxidation of the FeCrAlRE alloy Kanthal AF in dry and wet O2 at 600 and 800°C
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Canovic, Sead (author)
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- Engkvist, Josefin (author)
- Högskolan Dalarna,Materialvetenskap
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Liu, Fang (author)
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Götlind, Helena (author)
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Hellström, Kristina (author)
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Svensson, Jan-Erik (author)
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Johansson, Lars-Gunnar (author)
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- Olsson, Mikael (author)
- Högskolan Dalarna,Materialvetenskap
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Halvarsson, Mats (author)
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(creator_code:org_t)
- The electrochemical society, 2010
- 2010
- English.
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In: Journal of the Electrochemical Society. - : The electrochemical society. - 0013-4651 .- 1945-7111. ; 157:6, s. C223-C230
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The FeCrAlRE (where RE is reactive element) alloy Kanthal AF was exposed isothermally at 600 and 800°C for 72 h in dry O2 and in O2 with 10 vol % H2O. The mass gains were 3–5 times higher at the higher temperature. The presence of water vapor increased the oxidation rate at 800°C, while no significant effect was observed at 600°C. A thin two-layered oxide formed at 600°C: an outer (Fe,Cr)2O3 corundum-type oxide, containing some Al, and an inner, probably amorphous, Al-rich oxide. At 800°C a two-layered oxide formed in both environments. The inner layer consisted of inward grown a-Al2O3. In dry O2 the originally formed outward grown g-Al2O3 had transformed to a-Al2O3 after 72 h. Water vapor stabilized the outward grown g-Al2O3 and hence no transformation occurred after 72 h in humid environment. RE-rich oxide particles with varying composition (Y, Zr, and Ti) were distributed in the base oxide at both temperatures and in both environments. The RE-rich particles were separated from the alloy substrate by a layer of Al-rich oxide. At 800°C the Y-rich RE particles were surrounded by thick oxide patches in both dry and humid O2.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Keyword
- FeCrAl-legering
- högtemperaturoxidation
- transmissionselektronmikroskopi
- Steel Forming and Surface Engineering
- Stålformning och ytteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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