Powder Metallurgy and Metal Ceramics

, Volume 58, Issue 5–6, pp 278–284 | Cite as

Microstructural and Mechanical Characteristics of Porous Irons Produced with Small Particle Size Corn Starch

  • Mingzhou Su
  • Huimeng Wang
  • Qiaoling Zhou
  • Chang ChenEmail author

The space holder technique was widely used in manufacturing high melting-point porous metals. Corn powders with a smaller size (11.4 μm on average) than that of iron powders (25.5 μm on average) were used as a space holder. Porous irons having microporosities between 37.9% and 48.9% were produced after sintering at 1100–1250°C for 2 h. The amount of increase in microporosity was much less than the corn volume fraction because some corn powders scattered in micropores already formed between the iron powders. The volumetric shrinkage increased with the corn addition and/or the sintering temperature. In addition, the compressive yield stress was 108 ± ± 8 MPa, 77 ± 26 MPa, and 61 ± 31 MPa for corn additions of 0, 20, and 40 vol.%, respectively. The high sintering temperature could reduce the negative effect of corn addition on the yield stress. Perfect contacts between iron powders were observed at 1250°C, indicating that a high temperature was necessary to obtain excellent mechanical properties for this kind of porous irons.


space holder technique powder size micropore volumetric shrinkage mechanical property 



This work was supported by the National Natural Science Foundation of China (Grant No. 51478380).


  1. 1.
    J. Banhart, “Manufacture, characterization and application of cellular metals and metal foams,” Prog. Mater. Sci., 46, No. 6, 559–632 (2001).CrossRefGoogle Scholar
  2. 2.
    L.J. Gibson and M.F. Ashby, Cellular Solids: Structure and Properties, Cambridge University Press, Cambridge (1997), pp. 6–7.CrossRefGoogle Scholar
  3. 3.
    J.P. Li, S.H. Li, K. de Groot, and P. Layrolle, “Preparation and characterization of porous titanium,” Key Eng. Mater., 218–220, 51–54 (2001).CrossRefGoogle Scholar
  4. 4.
    S.T. Szyniszewski, B.H. Smith, J.F. Hajjar, B.W. Schafer, and S.R. Arwade, “The mechanical properties and modeling of a sintered hollow sphere steel foam,” Mater. Des., 54, 1083–1094 (2014).CrossRefGoogle Scholar
  5. 5.
    M. Barrabés, P. Sevilla, J.A. Planell, and F.J. Gil, “Mechanical properties of nickel–titanium foams for reconstructive orthopedics,” Mater. Sci. Eng. C, 28, No. 1, 23–27 (2008).CrossRefGoogle Scholar
  6. 6.
    W. Niu, C. Bai, G. Qiu, and Q. Wang, “Processing and properties of porous titanium using space holder technique,” Mater. Sci. Eng. A, 506, No. 1–2, 148–151 (2009).CrossRefGoogle Scholar
  7. 7.
    B.Ye and D.C. Dunand, “Titanium foams produced by solid-state replication of NaCl powders,” Mater. Sci. Eng. A, 528, No. 2, 691–697 (2010).CrossRefGoogle Scholar
  8. 8.
    Y.Y. Zhao, T. Fung, L.P. Zhang, and F.L. Zhang, “Lost carbonate sintering process for manufacturing metal foams,” Scripta Mater., 52, No. 4, 295–298 (2005).CrossRefGoogle Scholar
  9. 9.
    Z. Esen and S. Bor, “Processing of titanium foams using magnesium spacer particles,” Scripta Mater., 56, No. 5, 341–344 (2007).CrossRefGoogle Scholar
  10. 10.
    N. Bekoz and E. Oktay, “Effects of carbamide shape and content on processing and properties of steel foams,” J. Mater. Process. Technol., 212, No. 10, 2109–2116 (2012).CrossRefGoogle Scholar
  11. 11.
    N. Bekoz and E. Oktay, “Mechanical properties of low alloy steel foams: Dependency on porosity and pore size,” Mater. Sci. Eng. A, 576, 82–90 (2013).CrossRefGoogle Scholar
  12. 12.
    A. Laptev, M. Bram, H.P. Buchkremer, and D. Stöver, “Study of production route for titanium parts combining very high porosity and complex shape,” Powder Metall., 47, No. 1, 85–92 (2004).CrossRefGoogle Scholar
  13. 13.
    S.A. Tsukerman, Powder Metallurgy, Pergamon Press, Oxford (1965), p. 87.Google Scholar
  14. 14.
    G.S. Upadhyaya, Powder Metallurgy Technology, Cambridge International Science Publishing, England, UK (2002), p. 70.Google Scholar
  15. 15.
    Z. Esen and S. Bor, “Characterization of Ti–6Al–4V alloy foams synthesized by space holder technique,” Mater. Sci. Eng. A, 528, No. 7–8, 3200–3209 (2011).CrossRefGoogle Scholar
  16. 16.
    Y. Torres, J.J. Pavón, I. Nieto, and J.A. Rodríguez, “Conventional powder metallurgy process and characterization of porous titanium for biomedical applications,” Metall. Mater. Trans. B, 42, No. 4, 891–900 (2011).CrossRefGoogle Scholar
  17. 17.
    Y. Torres, S. Lascano, J. Bris, J. Pavón, and J.A. Rodriguez, “Development of porous titanium for biomedical applications: A comparison between loose sintering and space-holder techniques,” Mater. Sci. Eng. C, 37, 148–155 (2014).CrossRefGoogle Scholar
  18. 18.
    B. Wang and E. Zhang, “On the compressive behavior of sintered porous coppers with low-to-medium porosities—Part II: Preparation and microstructure,” Int. J. Mech. Sci., 50, No. 3, 550–558 (2008).CrossRefGoogle Scholar

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Mingzhou Su
    • 1
  • Huimeng Wang
    • 1
  • Qiaoling Zhou
    • 1
  • Chang Chen
    • 2
    Email author
  1. 1.School of Civil EngineeringXi’an University of Architecture and TechnologyXi’anP. R. China
  2. 2.School of Materials Science and EngineeringXi’an University of Architecture and TechnologyXi’anP. R. China

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