Abstract
Here, we report a simple and cost-effective technique for mass-scale processing of open-cell foams of metals and alloys with precise control over foam parameters (pore size, pore distribution, and strut thickness). The process involves pressurized infiltration of molten metals/alloys into salt preforms under 1.5–4 bar inert gas pressure. The preforms were fabricated from spherical particles of different salts, selected on the basis of the melting temperature of the metals/alloys. The porous metallic structures were recovered by leaching out the salt patterns. The working temperature and the applied pressure play the most vital role in determining the foam structure. The developed foams were studied with optical microscope, scanning electron microscope (SEM), and X-ray computed tomography (CT). Mechanical properties of the developed foams evaluated under quasi-static compressive loading are also reported.
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This work has been financially supported by the Department of Science and Technology, Government of India (Project # SR/FTP/PS-214).
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Soni, B., Biswas, S. Mass-scale processing of open-cell metallic foams by pressurized casting method. J Porous Mater 24, 29–37 (2017). https://doi.org/10.1007/s10934-016-0233-9
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DOI: https://doi.org/10.1007/s10934-016-0233-9