Abstract
Even with their wide usage, porous metal foams (PMFs) are limited by their poor mechanical strength owing to their inherent porous structures. This study employed a combination of vacuum sintering and microarc oxidation (MAO) to enhance the mechanical properties and corrosion resistance of Al foam while maintaining its low density. Tribological tests and microstructural analysis demonstrated the stable friction coefficients and excellent wear resistance of the MAO-treated PMFs. Further, the microarc discharge strengthening mechanism was explained, and a physical model was proposed. Finally, this approach produced wear-resistant porous Al foams, offering a promising solution to overcome the limitations of PMFs.
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