Oxidation behavior of Ni-Cr-1ThO2 alloys at 1000 and 1200�C

Davis, H.H.; Graham, H. C.; Kvernes, I.

doi:10.1007/bf00604044

Cited by 58 publications

(11 citation statements)

References 21 publications

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“…Oxide dispersions not only improve the creep strength, but also have been found to be beneficial to the oxidation resistance of both Fe-and Ni-base alloys. [15][16][17][18][19][20][21][22][23] The oxidation behavior of ODS Fe-Cr alloys has been previously investigated, 1,17,18,24,25 however, the materials in this study have lower Cr contents (13-14 at.%Cr) than several of the earlier studies. At these low Cr contents, Fe-Cr alloys are considered marginal chromia-formers and, as the Cr-consumption rate increases with temperature, can be limited at higher temperatures in their ability to form a protective, external Cr 2 O 3 -rich scale.…”

Section: Introductionmentioning

confidence: 91%

Oxidation Behavior of ODS Fe?Cr Alloys

Pint

Wright

2005

Oxid Met

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Section: Introductionmentioning

confidence: 91%

Oxidation Behavior of ODS Fe?Cr Alloys

Pint

Wright

2005

Oxid Met

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“…The experimental volatilization rate of the present study and the above mentioned investigations (9,30,32,97) have also been compared with the high temperature mass. Table 9.…”

Section: Observed Rate (Gm Cr 2 0 3 /Cm 2 -Sec)mentioning

confidence: 86%

“…The reaction temperatures used were 900, 1000 and 1100°C tihere the volatilization rate becomes significanto The equilibrium gas composition in the reaction column can be calculated (Appendix B) using the stoichiometric relationships between the reaction species and the available expression for the Gibbs energy of formation. The calculated equilibrium mole fraction of gaseous species in the reaction column was used ..to calculate the heat capacity and the thermal conductivity of the gas mixture from the individual property.The binary diffusion_ between cro3 and oxygen vas used to approximate the multicomponent diffusion.The experimental conditions of the other related studies(9,30,32,97) are given inTable 9o• , _• :~>}.~~f:;:7~. :>•_,:• • .…”

mentioning

confidence: 99%

High temperature corrosion studies. A. Iron: based superalloy in SO/sub 2//O/sub 2/ atmospheres. B. Gas: solid reaction with formation of volatile species

Liu¹

1980

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unknown ~easons (164). Fifth, the formation of volatile species plays an ~mFortant role in many high temperature gas-sol~4 metallurgical reactions. !his type ~f reaction should be ~pn~idered ~ith the scale formation reaction in order to evaluate the high temperature material performance. The oxida~ive volatilization of chromium oxide• at very high temperatures can pecome significant since the latter material is one 9t ~~e ~o~t important protective scales in many high temperatu~e ~~l9ys. The p~es~n~ ipvestigation is divided into two c~tegori~s which are b~sl~~llY related to each other in the study of gaseous ~9~~9sipn of metals at high• temperatures.. The first is the experlmeutal study of the corrosion behavior of several i~9n~~ased superalloys and pure chromium metals under so 2 ,o 2 atmosph~~es between 750 ~nd 1100°C by the thermogr~vimet~ic method. Different kinetic models were employed ~o ~n,ly~e the data in oE~er to get the most reliable re~ction rate constants. The effects of sulfur activity ~~9 g~? !low on the corrosion rate were studied. The activation energies were obtained from fitting the reaction rate to the Arrehenius equation. The reaction products were examined by met~_llographic procedufe•~• X-ray .. diffractipp method and electron microprobe analysis. The second part of this investigation reevaluated the published kinetic data of several gas-solid reactions ~ith the ~

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“…The accumulation of Nb and Mo with Cr was observed at the interface between the outer and inner corrosion layers. When alloys containing small amounts of oxygen active elements are oxidized at high temperatures, the oxygen active elements can affect the growth rates of the oxides depending on the types of oxides and the adhesive strength between the oxide and the base metal [22][23][24]. Particularly, Mo has been reported to reinforce the adhesive strength between a base metal and an oxide in stainless steel and has also been shown to prevent the migration of ions across the boundary between a passive film and a base metal [25,26].…”

Section: Corrosion Behaviorsmentioning

confidence: 99%

Corrosion behavior of Ni−Base alloys in a hot lithium molten salt under an oxidizing atmosphere

Cho

You

et al. 2007

Met. Mater. Int.

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The electrolytic reduction of a spent oxide fuel involves the liberation of the oxygen in molten LiCl electrolyte, which is a chemically aggressive environment that is excessively corrosive for typical structural materials. Accordingly, it is essential to choose the optimum material for the processing equipment that handles the molten salt. In this study, the corrosion behaviors of Haynes 263, Haynes 75, Inconel 718 and Inconel X-750 in a molten LiCl-Li 2 O salt under an oxidizing atmosphere were investigated at 650 o C for 72 to 216 hrs. The Haynes 263 alloy showed the best corrosion resistance among the examined alloys. The corrosion products of Haynes 263 were Li(Ni,Co)O2 and LiTiO2; those of Haynes 75 were Cr2O3, NiFe2O4, LiNiO2 and Li2NiFe2O4; while Cr2O3, NiFe2O4 and CrNbO4 were identified as the corrosion products of Inconel 718. Inconel X-750 produced Cr2O3, NiFe2O4 and (Cr,Nb,Ti)O2 as its corrosion products. Haynes 263 showed a localized corrosion behavior while Haynes 75, Inconel 718 and Inconel X-750 showed a uniform corrosion behavior.

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Oxidation behavior of Ni-Cr-1ThO2 alloys at 1000 and 1200�C

Cited by 58 publications

References 21 publications

Oxidation Behavior of ODS Fe?Cr Alloys

Oxidation Behavior of ODS Fe?Cr Alloys

High temperature corrosion studies. A. Iron: based superalloy in SO/sub 2//O/sub 2/ atmospheres. B. Gas: solid reaction with formation of volatile species

Corrosion behavior of Ni−Base alloys in a hot lithium molten salt under an oxidizing atmosphere

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