Ti2AlC foams produced by gel-casting. Issue 9 (September 2015)

• Record Type: Journal Article
• Authors: Potoczek, M.; Guzi de Moraes, E.; Colombo, P.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 9(2015:Sep.)
• Page Start: 2445
• Page End: 2452
• Publication Date: 2015-09
• Subjects: Porous materials -- Carbides -- Gel-casting; 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.2015.03.015
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Ti2 AlC foams possessing an almost completely open porosity ranging from 87 to 93 vol% were manufactured by gel-casting using agarose. By laying the samples on a Ti3 AlC2 powder bed while sintering at 1400 °C, it was possible to retain a large amount of the Ti2 AlC phase in the final ceramic foams. Increasing the agarose content in the slurry decreased the amount of total porosity as well as the cell and cell window size. The average cell size ranged from 335 to 615 μm and the average cell window size ranged from 72 to 162 μm for foams with a porosity of 87 and 93 vol%, respectively. A reduction in total porosity and in average cell and cell window size led to a decrease in permeability of the cellular structures. The strength of the foams ranged from 1.60 to 2.79 MPa, depending on the amount of porosity.