High-temperature oxidation of Al-deposited stainless-steel foils

Andoh, Atsushi; Taniguchi, Shigeji; Shibata, Toshio

doi:10.1007/bf01048642

Cited by 19 publications

(16 citation statements)

References 8 publications

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“…These observations not only confirmed but substantially extended the results of previous studies on these two approaches [12,13,22].…”

Section: Discussionsupporting

confidence: 81%

“…An alternative way forward to enrichment could be by Al surface deposition and subsequent diffusion into the substrate. Previous studies [12,13] using electron beam Al vapour deposition have confirmed the viability of this approach. The SMILER project has assessed two procedures to enrich the alloy Al content to 7 to 8 w/o firstly, by hot-dipping or cladding to form Aluchrom P and secondly by aluminising the commercial alloys Aluchrom YHf, Aluchrom YHfAl and Kanthal AF.…”

Section: Introductionmentioning

confidence: 65%

“…For all situations, however, the second chemical failure stage derives from oxidation of iron leading eventually to complete metal consumption. Under certain circumstances, during the intervening period a Cr 2 O 3 sub-scale can form beneath the outer-alumina layer and afford what has been termed 'psuedo protection' [12]. Its duration depends on the alloy composition, section thickness and, in general, decreases markedly with increasing temperature.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lifetime extension of FeCrAlRE alloys in air: Potential roles of an enhanced Al-reservoir and surface pre-treatment

Bennett¹,

Nicholls²,

Simms³

et al. 2005

Materials and Corrosion

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“…These observations not only confirmed but substantially extended the results of previous studies on these two approaches [12,13,22].…”

Section: Discussionsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lifetime extension of FeCrAlRE alloys in air: Potential roles of an enhanced Al-reservoir and surface pre-treatment

Bennett¹,

Nicholls²,

Simms³

et al. 2005

Materials and Corrosion

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“…That is the reason why many researchers have studied the effect of reactive elements on the adherence of oxide scales. 8,9,[27][28][29][30][31][32][33] It has been proven that the addition of small particles of oxygen-active elements into the materials can improve their oxidation resistance. The reactive element can be introduced as an alloying element or as oxide dispersion either in the bulk or as a coating.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature-Oxidation Behavior of Iron–Aluminide Diffusion Coatings

2006

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Aluminide diffusion coatings were oxidized in air under atmospheric pressure under isothermal and cyclic conditions. The high-temperature efficiency of the pack-aluminized alloys was tested by comparing their oxidation behavior in the temperature range 800-1080°C. The k p values deduced from the parabolic plots of weight-gain curves showed that a-Al 2 O 3 composed the major phase of the oxide scale on samples oxidized at T > 1000°C. For lower temperatures, transient-alumina phases were observed. The aluminide materials also exhibited excellent resistance to cyclic oxidation at 1000°C. The second aim of this study was to dope the aluminide compounds obtained by a pack-cementation process with yttria, which was introduced by metal-organic chemical-vapor deposition (MOCVD). The beneficial effect of the reactive-element-oxide coating is strongly dependent on its mode of introduction, since the oxidation resistance is drastically increased when the Y 2 O 3 coating was applied prior to the aluminization process. When applied after the aluminization, the reactive element gave negative effects on the high-temperature oxidation behavior of the iron aluminides. The oxide morphologies, X-ray diffraction patterns and two-stage experiments helped to understand the oxide-scale-growth mechanisms.

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“…[11] and for a FeCrAl alloy with an aluminium coating produced by vapour deposition in ref. [12,13]. As is known for yttrium containing FeCrAl alloys [2,14,15] the a-alumina scale grows mainly by inward diffusion of oxygen along the grain boundaries of the scale.…”

Section: Discussionmentioning

confidence: 99%

A new austenitic alumina forming alloy: an aluminium‐coated FeNi32Cr20

Hattendorf¹,

Hojda²,

Naumenko³

et al. 2008

Materials & Corrosion

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The FeCrAl alloys owe their low oxidation rate to the formation of a slow growing α‐aluminium oxide scale. Therefore they are used, for example, as a substrate material in metal‐supported automotive catalytic converters. Increasing exhaust gas temperatures mean that, in addition to the oxidation properties, high temperature mechanical properties should also be improved. Compared to the ferritic FeCrAl alloys, austenitic alloys possess the required high mechanical strength at higher temperatures. However for most commercially available materials the oxidation resistance is not sufficient due to a low aluminium content. High aluminium contents are avoided in austenitic alloys, since they cause severe workability problems, even at aluminium contents, which are below the necessary amount to get a pure alumina scale. The newly developed material Nicrofer 3220 PAl (coated FeNiCrAl) consists of an austenitic FeNi32Cr20 alloy coated with aluminium on both sides. It combines the outstanding oxidation resistance of an alumina forming FeCrAl alloy with the advantage of the high temperature strength of an austenitic alloy. Additionally the oxidation is even lower than the oxidation of the commercial grade Aluchrom YHf (FeCr20Al6)—conventional homogenous FeCrAl. Aluminium coated FeNiCrAl can easily be formed into its final shape. Prior to service, an in situ heat treatment is recommended in order to optimize the properties.

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High-temperature oxidation of Al-deposited stainless-steel foils

Cited by 19 publications

References 8 publications

Lifetime extension of FeCrAlRE alloys in air: Potential roles of an enhanced Al-reservoir and surface pre-treatment

Lifetime extension of FeCrAlRE alloys in air: Potential roles of an enhanced Al-reservoir and surface pre-treatment

High-Temperature-Oxidation Behavior of Iron–Aluminide Diffusion Coatings

A new austenitic alumina forming alloy: an aluminium‐coated FeNi32Cr20

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