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Volume 26 Issue 5
May  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(5): 588-596
Hamid Sazegaran and Milad Hojati, Effects of copper content on microstructure and mechanical properties of open-cell steel foams, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 588-596. https://doi.org/10.1007/s12613-019-1767-z
Cite this article as:
Hamid Sazegaran and Milad Hojati, Effects of copper content on microstructure and mechanical properties of open-cell steel foams, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 588-596. https://doi.org/10.1007/s12613-019-1767-z
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研究论文

Effects of copper content on microstructure and mechanical properties of open-cell steel foams

  • Department of Industrial Engineering, Faculty of Engineering, Quchan University of Technology, Quchan 94771-67335, Iran

  • Manufacturing Management of Mashhad Powder Metallurgy Company, Mashhad 94772-54258, Iran

  • 通讯作者:

    Hamid Sazegaran    E-mail: h.sazegaran@qiet.ac.ir

  • The effects of copper content on the microstructural and mechanical properties of steel foams are investigated. Spherical urea granules, used as a water-leachable space holder, were coated with a mixture of iron, ultrafine carbon, and different amounts of copper powders. After the mixture was compacted and the space holder was removed by leaching, a sintering process was performed under an atmosphere of thermally dissociated ammonia. Microstructural evaluations of the cell walls were carried out using optical microscopy and scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy. In addition, compression tests were conducted to investigate the mechanical properties of the manufactured steel foams. The results showed that the total porosity decreases from 77.2% to 71.9% with increasing copper content in the steel foams. In the foams' microstructure, copper islands are mostly distributed in pearlite and intergranular carbide phases are formed in the grain boundaries. When the copper content was increased from 0 to 4wt%, the elastic modulus, plateau stress, fracture stress, and fracture strain of manufactured steel foams improved 4.5, 6, 6.4, and 2.5 times, respectively.
    • Research Article

    Effects of copper content on microstructure and mechanical properties of open-cell steel foams

    + Author Affiliations
      Abstract
    • The effects of copper content on the microstructural and mechanical properties of steel foams are investigated. Spherical urea granules, used as a water-leachable space holder, were coated with a mixture of iron, ultrafine carbon, and different amounts of copper powders. After the mixture was compacted and the space holder was removed by leaching, a sintering process was performed under an atmosphere of thermally dissociated ammonia. Microstructural evaluations of the cell walls were carried out using optical microscopy and scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy. In addition, compression tests were conducted to investigate the mechanical properties of the manufactured steel foams. The results showed that the total porosity decreases from 77.2% to 71.9% with increasing copper content in the steel foams. In the foams' microstructure, copper islands are mostly distributed in pearlite and intergranular carbide phases are formed in the grain boundaries. When the copper content was increased from 0 to 4wt%, the elastic modulus, plateau stress, fracture stress, and fracture strain of manufactured steel foams improved 4.5, 6, 6.4, and 2.5 times, respectively.
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