Metastability in the MgAl₂O₄-Al₂O₃ System

Author

Kelley R. Wilkerson, Missouri University of Science and TechnologyFollow
Jeffrey D. Smith, Missouri University of Science and TechnologyFollow
James G. Hemrick

Abstract

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.

Recommended Citation

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

Department(s)

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)

1546-542X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 The American Ceramic Society, All rights reserved.

Publication Date

01 Nov 2014