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Effect of submicron spinel powders on the microstructure evolution and properties of alumina‐based refractory castables
Author(s) -
Chen Pingan,
Wang Yulong,
Li Xiangcheng,
Zhu Boquan
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12701
Subject(s) - spinel , materials science , microstructure , porosity , refractory (planetary science) , metallurgy , slag (welding) , composite material , mechanical strength
The physical properties, including flow value, apparent porosity, and mechanical strength, increased significantly with submicron spinel contents in this study. The excellent physical properties can be attributed to the close‐packed microstructure and high bonding strength between spinel and aggregates/matrix. Additionally, the submicron spinel powders promoted the formation of tabular CA 6 grains that generated a cross‐linked structure and enhanced the mechanical properties. The microstructures of corroded castables suggested that submicron spinel powders contributed to the formation of a continuous and thick spinel layer at the slag–refractory interface and subsequently improved the slag resistance of the castables.