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Controlled Firing of Reaction‐Bonded Aluminum Oxide (RBAO) Ceramics: Part II, Experimental Results
Author(s) -
Gaus Shaun P.,
Sheedy Paul M.,
Caram Hugo S.,
Chan Helen M.,
Harmer Martin P.
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb01852.x
Subject(s) - machinability , ceramic , thermogravimetry , materials science , aluminium , oxide , metallurgy , differential thermal analysis , aluminum oxide , work (physics) , mineralogy , composite material , mechanical engineering , chemistry , inorganic chemistry , physics , optics , engineering , diffraction , machining
The reaction‐bonded aluminum oxide (RBAO) process is an attractive alternative to conventional processing of ceramics, because of advantages such as lower costs, enhanced green machinability, near‐net‐shape forming, and broad microstructural variability. However, various problems are still encountered in the production of RBAO ceramics. Part I of the paper presented model predictions that may allow for the controlled firing of RBAO ceramics. The current work investigates the reaction behavior of RBAO ceramics under the model‐predicted conditions (i.e., for varying oxygen content, heat loss, heating cycles, and scale) via thermogravimetry, differential thermal analysis, and analysis of samples that have been fired in a box furnace. By controlling the reaction, one can produce large, crack‐free RBAO ceramics.