Abstract
Porous metals or metallic foams are novel lightweight materials employed in various functional and structural applications. The metals like Al, Mg, Fe, Ti, Ni, Cu and their alloys are widely used to prepare porous materials. Metals can be converted into the porous structure through the liquid metallurgy route or powder metallurgy route of their processing easiness. The liquid metallurgy route is adopted for the metals which have a lower melting point. While, for the metals having a higher melting point, the powder metallurgy route is preferred. Melt foaming by blowing agent, gas injection foaming and foam making through porous preform technique are the most common methods for the foam preparation through liquid metallurgy route. In powder metallurgy route, gas entrapment method, slurry foaming, loose powder sintering, space holder technique, gel casting and combustion synthesis are well-known methods of foam synthesis. The cells of the metallic foam may be closed type or open type depending on the specific synthesis process. The density of closed cell foams is higher as compared to open cell foam. Therefore, they are used in structural applications such as impact energy and sound absorber, honeycomb panels and automobile bumpers. The applications of open cell foams are in the area of the heat exchanger, filter and biomedical implants due to open cell properties.
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Singh, P., Shakya, J.P., Agarwal, P., Jain, S., Mondal, D.P., Verma, K.S. (2023). Synthesis of Lightweight Metallic Foam and Their Applications in Various Engineering Sectors. In: Vignesh, R.V., Padmanaban, R., Govindaraju, M. (eds) Advances in Processing of Lightweight Metal Alloys and Composites. Materials Horizons: From Nature to Nanomaterials. Springer, Singapore. https://doi.org/10.1007/978-981-19-7146-4_3
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DOI: https://doi.org/10.1007/978-981-19-7146-4_3
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