The Microstructure and Properties of 304L Stainless Honeycombs Fabricated by Extruding and Sintering

Abstract:

Pure 304L powder is used to mix with an additive to prepare a powder mixed paste. 304L honeycombs are fabricated by extruding the powder mixed paste, then dried and sintered. When sintering at 1150°C, 30minite, powder particles bind together and become grains. The structure parameters of and properties of sintered honeycombs were obtained by measuring and calculating. Results show that wall thickness 0.15~0.20mm, cell number (1/in2) 330~365, clear cross section (%) 73~79, specific surface Sv(sq m/cu dm）2.52~2.68; specific heat capacity Cp(J/g.K) 0.6~0.7, heat conductivity κ(W/m.K) 10~12; transverse compression strength 40~50 Mpa, longitudinal compression strength 140~150 Mpa. SEM/EDS analysis shows that the surface of sintered honeycombs is really rough, the structure of sintered honeycombs consists of matrix phase α-Fe(Cr,Ni) , complex compounds of silicon, iron and inclusion elements distributed in matrix . There is oxide film forming on surface of sintered honeycombs.

• Periodical: Advanced Materials Research (Volumes 393-395)
• Pages: 448-452
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.393-395.448
• Online since: November 2011
• Authors: Yun Zhou, Huang Peng, Meng Xuan, Xiao Qing Zuo
• Keywords: 304L, Catalyst Support, Extruded Honeycomb, Extruding, Metallic Honeycomb, Sintering

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DOI: 10.4028/www.scientific.net/amr.146-147.1921