Diffusional Growth Kinetics of Boride Layers on Iron-Chromium Alloys

Vasil I. Dybkov; L.V. Goncharuk; V.G. Khoruzha; K.A. Meleshevich; A.V. Samelyuk; V.R. Sidorko

doi:10.4028/www.scientific.net/SSP.138.181

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HomeSolid State PhenomenaSolid State Phenomena Vol. 138Diffusional Growth Kinetics of Boride Layers on...

Diffusional Growth Kinetics of Boride Layers on Iron-Chromium Alloys

Abstract:

Two boride layers were found to form at the interface of iiron-chromiium alllloys (10 and 25% Cr) or an industrial 13% Cr steel and boron at 850-950 oC and reaction times in the range 1-12 h. In the case of a Fe-10% Cr alloy and the steel, the layers are based on the FeB and Fe2B compounds. With a Fe-25% Cr alloy, the constituent phases are FeB and CrB for the outer layer and Fe2B and Cr2B for the inner layer. Both layers are characterized by a pronounced texture. Diffusional growth kinetics of boride layers are close to parabolic and can alternatively be described by a system of two non-linear differential equations, producing a good fit to the experimental data. The temperature dependence of the layer growth-rate constants obeys a relation of the Arrhenius type.

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Periodical:

Solid State Phenomena (Volume 138)

Pages:

181-188

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.138.181

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Online since:

March 2008

Authors:

Vasil I. Dybkov, L.V. Goncharuk, V.G. Khoruzha, K.A. Meleshevich, A.V. Samelyuk, V.R. Sidorko

Keywords:

Boride Layers, Chemical Composition, Fe-Cr Alloys, Growth Kinetic, Phase Identity

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