Metastability in the MgAl2O4-Al2O3 System

Kelley R. Wilkerson; Jeffrey D. Smith; James G. Hemrick

doi:10.1111/ijac.12294

Metastability in the MgAl₂O₄-Al₂O₃ System

Kelley R. Wilkerson, Jeffrey D. Smith, James G. Hemrick

Mechanical Properties and Mechanics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

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.

Original language	English
Pages (from-to)	1020-1024
Number of pages	5
Journal	International Journal of Applied Ceramic Technology
Volume	11
Issue number	6
DOIs	https://doi.org/10.1111/ijac.12294
State	Published - Nov 1 2014

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title = "Metastability in the MgAl2O4-Al2O3 System",

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.",

author = "Wilkerson, {Kelley R.} and Smith, {Jeffrey D.} and Hemrick, {James G.}",

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N2 - 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.

AB - 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.

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Metastability in the MgAl₂O₄-Al₂O₃ System

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