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 elevated 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% AI₂O₃ 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," Proceedings of the 13th Biennial Worldwide Congress on Refractories 2013 (2013, Victoria, Canada), pp. 303 - 308, John Wiley & Sons Inc., Sep 2014.

The definitive version is available at https://doi.org/10.1002/9781118837009.ch53

Meeting Name

13th Biennial Worldwide Congress on Refractories 2013 (2013: Sep. 10-13, Victoria, Canada)

Department(s)

Materials Science and Engineering

Comments

Chapter 53

Keywords and Phrases

Aluminum oxides; Elevated temperature; Material processing; Metastabilities; Metastable region, Aluminum

International Standard Book Number (ISBN)

978-111883703-0

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 The American Ceramic Society, All rights reserved.

Publication Date

13 Sep 2014