Research Information System
18th INTERNATIONAL CONFERENCE ON ENGINEERING & NATURAL SCIENCES, Girne, Cyprus (Kktc), 25 - 29 November 2025, pp.1406-1413, (Full Text)
Metallic and ceramic
foams are divided into two basic classes based on their pore structure: closed
and open pore. Differences in cell structure are directly related to the
manufacturing method and the parameters used. Open-pore foams, due to their
large specific surface area, are preferred in heat exchangers. Ceramic foams,
due to their high liquid/gas permeability and corrosion and high temperature
resistance, are preferred in filtration and separation processes, and in water
treatment applications where unwanted ions can be removed from solution. In
this study, open-cell Al-based alumina ceramic foams with varying pore sizes
were fabricated using the powder metallurgy method combined with aluminum
powder and the polyurethane foam (PU) replication technique. The structure
obtained after the removal of the PU at 500°C 3 hours was subsequently sintered
in an open atmosphere for 6 hours at temperatures of 850°C, 900°C, and 950°C. X-Ray
diffraction (XRD) analyses, scanning electron microscopy (SEM) and
microstructural investigations were performed on the fabricated ceramic-coated
foams. During the high-temperature oxidative sintering process conducted in an
open atmosphere, alumina ceramic-coated foams with optimal properties were
successfully obtained at 950 °C, achieved through the sintering mechanism
resulting from the oxidation of the aluminum powders.
Keywords: Open-cell foam, Powder
metallurgy, Metallic foam, Ceramic foam