Mechanical and physical characterization of Al2O3–C foam filters produced by distinct processing routes: The importance of the ceramic strut morphology. Issue 8 (July 2019)

• Record Type: Journal Article
• Authors: Luchini, B.; Storti, E.; Wetzig, T.; Settgast, C.; Abendroth, M.; Hubálková, J.; Pandolfelli, V.C.; Aneziris, C.G.
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 8(2019)
• Page Start: 2760
• Page End: 2769
• Publication Date: 2019-07
• Subjects: Carbon-bonded alumina -- Ceramic filters -- Computer tomography -- Centrifugation -- Refractory; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.02.048
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In this work the influence of the production route and filter dimensions on the mechanical properties of carbon-bonded alumina foam filters was investigated. Features like cold crushing strength and fracture behavior were analyzed and used to compare them. Microfocus computer tomography (μCT) was applied to characterize the geometry of the filters, providing a deep correlation with their fracture behavior. Furthermore, computer-generated filter geometries were used as reference. The results indicated that the centrifugation process is better suited for the production of carbon-bonded alumina filters, and is even more effective when the foam dimensions are increased in the range of those analyzed in this research. Finite element simulations showed the influence of the relative density and strut tapering on the cold crushing strength of filters, providing a correlation between filter structure and its failure mechanism. The attained results provided further insights towards the production of inclusions-free metal parts.