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Characterization of the intermetallic compounds formed during hot dipping of electrical steel in a hypo-eutectic Al-Si bath

(2010) Defect and Diffusion Forum Series. 297-301. p.370-375
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Abstract
In order to improve the magnetic properties of electrical steels, it may be desirable to increase the Si and/or Al content of the steel. A possible and alternative route to realize this is through the application of an Al-Si-rich coating on the steel substrate using a hot dipping process, followed by a diffusion annealing treatment. Previously, a series of compositions were used for dipping, namely: pure Al, Al + 10wt% Si (hypo-eutectic composition) and Al + 25wt% Si (hypereutectic composition). After these dipping experiments, and the subsequent evaluation of the coating and its formed intermetallic phases, the use of a hypo-eutectic Al-Si-bath was recommended for further investigation, because of certain advantages: i.e. hypo-eutectic concentrations allow lower dipping temperatures and reduce the formation of ordered Fe-Si-structures that cause brittleness in the coating and substrate. The present work reports on the results obtained on materials that were hot dipped in a hypo-eutectic Al-Si bath. An Al + 1wt%Si bath was used to coat electrical steel substrates with different silicon contents with dipping times, varying between 0 to 20 seconds, after a preheating of the samples to a temperature of 700°C. A thorough characterization of the formed intermetallics was made by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD). Three different compounds were identified as Fe2Al5, FeAl3 and a nearly pure Al phase.
Keywords
Hot dipping, Intermetallics, Electrical steels, LAYER, ALLOY, MOLTEN ALUMINUM, INTERFACE, SOLID IRON

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Citation

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MLA
Infante Danzo, Ivone, Kim Verbeken, and Yvan Houbaert. “Characterization of the Intermetallic Compounds Formed During Hot Dipping of Electrical Steel in a Hypo-eutectic Al-Si Bath.” Defect and Diffusion Forum Series. Ed. Andreas Öchsner et al. Vol. 297–301. Stafa-Zürich, Switzerland: Trans Tech, 2010. 370–375. Print.
APA
Infante Danzo, I., Verbeken, K., & Houbaert, Y. (2010). Characterization of the intermetallic compounds formed during hot dipping of electrical steel in a hypo-eutectic Al-Si bath. In A. Öchsner, G. E. Murch, A. Shokuhfar, & J. M. Delgado (Eds.), Defect and Diffusion Forum Series (Vol. 297–301, pp. 370–375). Presented at the 5th International Conference on Diffusion in Solids and Liquids : Mass transfer, heat transfer and microstructure and properties (DSL 2009), Stafa-Zürich, Switzerland: Trans Tech.
Chicago author-date
Infante Danzo, Ivone, Kim Verbeken, and Yvan Houbaert. 2010. “Characterization of the Intermetallic Compounds Formed During Hot Dipping of Electrical Steel in a Hypo-eutectic Al-Si Bath.” In Defect and Diffusion Forum Series, ed. Andreas Öchsner, Graeme E Murch, Ali Shokuhfar, and João MPQ Delgado, 297-301:370–375. Stafa-Zürich, Switzerland: Trans Tech.
Chicago author-date (all authors)
Infante Danzo, Ivone, Kim Verbeken, and Yvan Houbaert. 2010. “Characterization of the Intermetallic Compounds Formed During Hot Dipping of Electrical Steel in a Hypo-eutectic Al-Si Bath.” In Defect and Diffusion Forum Series, ed. Andreas Öchsner, Graeme E Murch, Ali Shokuhfar, and João MPQ Delgado, 297-301:370–375. Stafa-Zürich, Switzerland: Trans Tech.
Vancouver
1.
Infante Danzo I, Verbeken K, Houbaert Y. Characterization of the intermetallic compounds formed during hot dipping of electrical steel in a hypo-eutectic Al-Si bath. In: Öchsner A, Murch GE, Shokuhfar A, Delgado JM, editors. Defect and Diffusion Forum Series. Stafa-Zürich, Switzerland: Trans Tech; 2010. p. 370–5.
IEEE
[1]
I. Infante Danzo, K. Verbeken, and Y. Houbaert, “Characterization of the intermetallic compounds formed during hot dipping of electrical steel in a hypo-eutectic Al-Si bath,” in Defect and Diffusion Forum Series, Rome, Italy, 2010, vol. 297–301, pp. 370–375.
@inproceedings{900839,
  abstract     = {In order to improve the magnetic properties of electrical steels, it may be desirable to increase the Si and/or Al content of the steel. A possible and alternative route to realize this is through the application of an Al-Si-rich coating on the steel substrate using a hot dipping process, followed by a diffusion annealing treatment. Previously, a series of compositions were used for dipping, namely: pure Al, Al + 10wt% Si (hypo-eutectic composition) and Al + 25wt% Si (hypereutectic composition). After these dipping experiments, and the subsequent evaluation of the coating and its formed intermetallic phases, the use of a hypo-eutectic Al-Si-bath was recommended for further investigation, because of certain advantages: i.e. hypo-eutectic concentrations allow lower dipping temperatures and reduce the formation of ordered Fe-Si-structures that cause brittleness in the coating and substrate. 
The present work reports on the results obtained on materials that were hot dipped in a hypo-eutectic Al-Si bath. An Al + 1wt%Si bath was used to coat electrical steel substrates with different silicon contents with dipping times, varying between 0 to 20 seconds, after a preheating of the samples to a temperature of 700°C. A thorough characterization of the formed intermetallics was made by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD). Three different compounds were identified as Fe2Al5, FeAl3 and a nearly pure Al phase.},
  author       = {Infante Danzo, Ivone and Verbeken, Kim and Houbaert, Yvan},
  booktitle    = {Defect and Diffusion Forum Series},
  editor       = {Öchsner, Andreas and Murch, Graeme E and Shokuhfar, Ali and Delgado, João MPQ},
  isbn         = {9783908451808},
  issn         = {1012-0386},
  keywords     = {Hot dipping,Intermetallics,Electrical steels,LAYER,ALLOY,MOLTEN ALUMINUM,INTERFACE,SOLID IRON},
  language     = {eng},
  location     = {Rome, Italy},
  pages        = {370--375},
  publisher    = {Trans Tech},
  title        = {Characterization of the intermetallic compounds formed during hot dipping of electrical steel in a hypo-eutectic Al-Si bath},
  url          = {http://dx.doi.org/10.4028/www.scientific.net/DDF.297-301.370},
  volume       = {297-301},
  year         = {2010},
}

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