Preparation, Structure and Properties of FeCrAl Honeycombs

Abstract:

FeCrAl alloy powder is used to mix with an additive to prepare a powder mixed paste. FeCrAl alloy honeycombs are fabricated by extruding the powder mixed paste, then dried and sintered. While sintering at 1200°C, with sintering time increase, the volume of sintered honeycombs increase and density decrease. The structure parameters and properties of sintered honeycombs were obtained by measuring and calculating. Results show that wall thickness 0.18~0.23mm, cell number (1/in²) 316~339, clear cross section (%) 69~74, specific surface Sv (sq m/cu dm)2.35~2.52; specific heat capacity C_p(J/g.K) 0.60~0.70, heat conductivity κ (W/m.K) 6.52~6.78. SEM/XRD analysis shows that a large number of oxides formed on the surface of sintered honeycombs during sintering, such as Fe₂Cr₂0₄, Fe₂Si0₄, Al₂O₃.These oxides connect together to form film on surface of sintered honeycombs. By impregnating and baking test, the surface of sintered honeycomb can firmly adhere γ-Al₂O₃ catalytic washcoat. The oxide film formed on the surface sintered honeycombs is benefit for adhering and supporting the catalytic active components.

• Periodical: Advanced Materials Research (Volume 833)
• Pages: 305-309
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.833.305
• Online since: November 2013
• Authors: Jiao Yu, Yu Jie Du, Yun Zhou
• Keywords: Catalyst Support, Extruded Honeycomb, FeCrAl, Metallic Honeycomb

References

[1] C. Laura Dial, T.H. Sanders, J.K. Cochran: Metall. Mater. Trans. Vol. 43 (2012), p.1303.

[2] B.M. Dempsey, S. Eisele, D.L. McDowell: Int. J. Heat Mass Transfer. Vol. 48 (2005), p.527.

[3] A. M. Hayes, A.J. Wang, B. M. Dempsey, D. L. McDowell: Mech. Mater. Vol. 36 (2004), p.691.

[4] T. Uda, M. Tanaka, K. Munakata: Fusion Engineering and Design, Vol. 83 (2008), p.1715.

[5] C. G. Visconti, E. Tronconi, L. Lietti, et al: Applied Catalysis A: General, Vol. 370( 2009), p.93.

[6] T. Takashi, G. Tadashi, K. Nobuyuki, et al. US Patent. No 7947624, (2011).

[7] Corbett, D. Wayne, Miller, et al. US Patent. No 8435025, (2013).

[8] W.A. Cutler, US Patent. No 6881703 , (2005).

[9] J. Cochran, K.J. Lee, D. McDowell, T. Sanders, In: Processing and Properties of Lightweight Cellular Metals and Structures, edited by A. Ghosh, T. Sanders, D. Claar, TMS, 2002, p.127.

[10] J. L. Clark, J Cochran, H. Thomas, K. J. Lee, In: Processing and Properties of Lightweight Cellular Metals and Structures, edited by A. Ghosh, T. Sanders, D. Claar, TMS, 2002, p.116.

[11] Y. Zhou, X.Q. Zuo, J.H. Sun, J. Mei, J.L. Sun: Mater. Sci. Eng. A, Vol. 457 (2007), p.329.

[12] Y. Zhou, X.Q. Zuo, X.Q. Zhang, J. Mei, J.L. Sun: J. Mater. Sci. Eng. (in Chin. ), Vol. 23 (2005), p.504.

[13] Y. Zhou, Y.J. Du, X.Q. Zuo: Advanced Materials Research, Vols. 535-537 (2012), p.597.