Metastability in the MgAl₂O₄-Al₂O₃ System
Aluminum oxide must take a spinel form (γ-Al2O3) at increased temperatures in order for extensive solid solution to form between MgAl2O4 and α-Al2O3. The solvus line between MgAl2O4 and Al2O3 has been defined at 79.6 wt% Al2O3 at 1500°C, 83.0 wt% Al2O3 at 1600°C, and 86.5 wt% Al2O3 at 1700°C. A metastable region has been defined at temperatures up to 1700°C which could have significant implications for material processing and properties. Additionally, initial processing could have major implications on final chemistry.
K. R. Wilkerson et al., "Metastability in the MgAl₂O₄-Al₂O₃ System," International Journal of Applied Ceramic Technology, vol. 11, no. 6, pp. 1020-1024, Blackwell Publishing Ltd, Nov 2014.
The definitive version is available at https://doi.org/10.1111/ijac.12294
Materials Science and Engineering
Keywords and Phrases
Ceramic materials; Marketing, Aluminum oxides; Increased temperature; Material processing; Metastabilities; Metastable region; MgAl, Aluminum
International Standard Serial Number (ISSN)
Article - Journal
© 2014 The American Ceramic Society, All rights reserved.
01 Nov 2014