Abstract
The room and high temperature compression behavior of carbon‐bonded alumina spaghetti filters is investigated. The samples developed for high‐temperature steel melt filtration are produced by alginate‐based robo gel casting. In comparison with foam filters with hollow struts made by the replica technique, the spaghetti filters manufactured via the novel route exhibit full strut cross section. Brittle behavior of the samples is observed at room temperature and 800 °C, whereas at 1500 °C, the material shows ductile deformation. Moreover, the compressive strength at 1500 °C is higher than that at room temperature and 800 °C. In comparison with the previously studied carbon‐bonded alumina foam filters of similar bulk material composition and similar size produced by the replica method, the spaghetti filters exhibit significantly higher compression strength at high temperatures. The full struts and the relatively high bulk density of the spaghetti filters have positive influence on their mechanical strength.
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