Obtaining metallic foams using commercial and recycled aluminum as the main metal with various foaming agents
DOI:
https://doi.org/10.33414/rtyc.43.19-35.2022Keywords:
aluminium, sodium bicarbonate (NaHCO3), calcium carbonate (CaCO3), Copper (Cu), powder metallurgy, mesostructure, microstructureAbstract
The present work was based on the manufacture of metal foams using the powder metallurgy technique. For the production of samples, commercial and recycled aluminium powders were used. In some experiments, powdered copper was added as an allele, both commercial and recycled. Sodium bicarbonate (NaHCO3) and calcium carbonate (CaCO3) were used as foaming agents. The powders were mixed in different proportions. They were pressed with varying pressures and temperatures. They were foamed in the oven at temperatures between 640 ºC and 900 ºC in periods ranging from 1.5 minutes to 30 minutes. All the methods and procedures used made it possible to obtain foams, which by means of photographic images and/or X-ray tomography demonstrate qualitative structural differences. Such as the type, shape and distribution of pores, and the appearance of internal faults (cracks) normal to the compaction direction of the sample during the process of unidirectional compression of powders in the green state.
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Copyright (c) 2022 José Manuel Espasandin, Ofelia Jessica Soledad Canteros, Leonardo Gastón Barabas, María Teresa Malachevsky
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
