A Model for the Growth of Fe2B Layers on a Steel Substrate: Effect of the Surface Boron Concentration

Abstract:

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The growth kinetics of Fe2B layers formed at the surface of AISI 1018 was simulated. The paste-boriding (with a paste thickness of 4 mm) was applied to produce the Fe2B phase at the material surface; considering four temperatures (1123, 1173, 1223 and 1273 K) for 2, 4, 5, 6 and 8 h. The suggested model was based on the mass balance equation at the (Fe2B /substrate) interface. As a fitting parameter of the model, the surface boron concentration (12.16 wt. %B) was obtained in order to predict with a good agreement the experimental parabolic growth constants at the (Fe2B /substrate) interface derived from the literature. An expression of the parabolic growth constant at the (Fe2B /substrate) interface was obtained as a function of the two parameters: and . In addition, a relationship of the Fe2B layer thickness was also deduced that showed a good concordance with the experimental results from the literature.

Info:

Periodical:

Solid State Phenomena (Volume 170)

Edited by:

J.-L. Bobet, B. Chevalier and D. Fruchart

Pages:

185-189

DOI:

10.4028/www.scientific.net/SSP.170.185

Citation:

M. Keddam and R. Chegroune, "A Model for the Growth of Fe2B Layers on a Steel Substrate: Effect of the Surface Boron Concentration", Solid State Phenomena, Vol. 170, pp. 185-189, 2011

Online since:

April 2011

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$35.00

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