Preparation and characterization of novel porous Fe-Si alloys

Abstract

Porous Fe-Si alloys with different nominal compositions ranging from Fe-10wt% Si to Fe-50wt% Si were fabricated through a reactive synthesis of Fe and Si elemental powder mixtures. The effects of Si contents on the pore structure of porous Fe-Si alloy were investigated in detail. The results showed that the open porosity, gas permeability and maximum pore size of the porous Fe-Si alloys increased with increasing Si contents, indicating that the porosity and pore size can be tailored by changing the Si contents. The pore structure parameter including the open porosity, gas permeability, maximum pore size obeyed the Hagen-Poiseuille formula with the constant G=0.035 m^-1Pa^-1s^-1 for the reactively synthesized porous Fe-Si alloys. The mechanical property of the porous Fe-Si alloys showed applicability in the filtration industries.

Keywords

reactive synthesis / porous Fe-Si alloys / pore structure

References

[1] Chen JF, Song JR, Wen LX, et al. Preparation and Characterization of Agglomerated Porous Hollow Silica Supports for Olefin Polymerization Catalyst[J]. Journal of Non-Crystalline Solids, 2007, 353(11): 1030-1036.

[2] Ito W, Nagai T, Sakon T. Oxygen Separation from Compressed Air Using a Mixed Conducting Perovskite-type Oxide Membrane[J]. Solid State Ionics, 2007, 178(11): 809-816.

[3] Mukhopadhyay SM, Pulikollu RV, Roy A. Surface Modification of a Microcellular Porous Solid: Carbon Foam[J]. Applied surface science, 2004, 225(1): 223-228.

[4] Unger RE, Sartoris A, Peters K, et al. Tissue-like Self-assembly in Cocultures of Endothelial Cells and Osteoblasts and the Formation of Microcapillary-like Structures on Three-dimensional Porous Biomaterials[J]. Biomaterials, 2007, 28(27): 3965-3976.

[5] Choi JH, Ahn IS, Bak YC, et al. Preparation of High Porous Metal Filter Element for the Fail-safety Function[J]. Powder Technology, 2004, 140(1): 98-105.

[6] Birkholz U, Schelm J. Mechanism of Electrical Conduction in ß-FeSi2 [J]. Physica Status Solidi (B), 1968, 27(1): 413-425.

[7] Kojima T. Semiconducting and Thermoelectric Properties of Sintered Iron Disilicide[J]. Physica Status Solidi (A), 1989, 111(1): 233-242.

[8] Omurtag Y, Doruk M. Some Investigations on the Corrosion Characteristics of Fe-Si Alloys[J]. Corrosion Science, 1970, 10(4): 225-231.

[9] Rolls R, Shahhosseini M. Effect of Creep on the Oxidation Characteristics of Fe-Si Alloys at 973-1073 K[J]. Oxidation of Metals, 1982, 18(3-4): 115-126.

[10] Westbrook JH, Fleischer RL. Intermetallic Compounds: Principles and Practice[M]. Vol. 3, Progress. Wiley: 2002

[11] Mckmey C, Devan J, Tortorelli P, et al. Commentaries And Reviews[J]. J. Mater. Res., 1991, 6(8): 1779

[12] Lu FS, Qiao L, Bi Xf. Magnetic and Mechanical Properties of FeSi Alloys with High Si Content[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(z2): 81-84.

[13] LI Y-g, LIANG J-l, LI H, et al. Character of Fe-Si Transition Gradient Layer Generated on Surface of 6. 5%Si Steel Sheet by Siliconizing[J]. The Chinese Journal of Nonferrous Metals, 2009, 19(4): 714-717.

[14] Murakami T, Hibi Y, Mano H, et al. INUI H, Friction and Wear Properties of Fe-Si Intermetallic Compounds in Ethyl Alcohol[J]. Intermetallics, 2012, 20(1): 68-75.

[15] Sakamoto I, Honda S, Tanoue H, et al. Structural and Magnetic Properties of Fe/Si and Fe/FeSi Multilayers[J]. Journal of Magnetism and Magnetic Materials, 2005, 290: 78-81.

[16] Katsuki F, Tomida T, Takata A, et al. Development of a Porous FeSi2 Thermoelectric Conversion Element[J]. Materials Transactions-JIM, 2000, 41(5): 624-627.

[17] Fiorillo F. Advances in FeSi Properties and Their Interpretation[J]. Journal of Magnetism and Magnetic Materials, 1996, 157: 428-431.

[18] Kerl R, Wolef J, Hehenkamp T. Equilibrium Vacancy Concentrations in FeAl and FeSi Investigated with an Absolute Technique[J]. Intermetallics, 1999, 7(3): 301-308.

[19] Zou YH, Gu HS. The Investigation on Reaction Mechanism of FeSi2 Alloy by Powder Metallurgy Method[J]. Journal of Hubei University, 2010, 32(4): 410-413.

[20] Hernndez A, Calvo J, Tejerina F. Pore size Distributions in Microporous Membranes. A Critical Analysis of the Bubble Point Extended Method [J]. Journal of Membrane Science, 1996, 112(1): 1-12.

[21] Kipp S Z, Llner M, Ott O, et al. Reactivity and Transport in the System Fe-Si[J]. Solid State Ionics, 2004, 172(1): 407-412.

[22] Huang PY. Powder Metallurgy Principle[M]. Beijing: Metallurgy Industry Press, 1997: 289–290

[23] Jiang Y, He YH, Xu NP, et al. Effects of the Al Content on Pore Structures of Porous Ti-Al Alloys[J]. Intermetallics, 2008, 16(2): 327-332.

[24] Ito S, Takahashi Y, Fujii T. Solid State Reactions in Fe-Si System under HIPping Pressure[J]. Solid State Ionics, 2001, 141: 433-438.

[25] Biswas S, Winoto H. Prediction of Pressure Drop in Non-woven Filter Media Using a Hgen-Poiseuille Model[J]. Tribology Transactions, 2000, 43(2): 251-256.

[26] Xu GB, Wang FM. Prediction of the Permeability of Woven Fabrics[J]. Journal of Industrial Textiles, 2005, 34(4): 243-254.