Magnesium Aluminate ( MgAl2O4 )
Reference: NIST Technical Note
Reference: NIST Structural Ceramics Database
Note: About Property Data Summaries.
Note: Abbreviations and Other Notes
Note: Other Materials
Material Summary:
[Ref. 1,2,3a] [Ref. 3b] [Ref. 4,5,7] [Ref. 6]
Manufacturer........: Unknown Unknown Unknown Unknown
Material Designation: magnesium aluminate magnesium aluminate magnesium aluminate magnesium aluminate
Material Form.......: Polycrystal Polycrystal Single Crystal Single Crystal
Composition.........: MgAl2O4; also MgAl2O4 MgAl2O4 MgO·3.5Al2O3
(mass fraction) MgO·Al2O3 +0.01% CaZrO4 (nonstoichiometric)
Processing..........:
[Ref. 8]
Manufacturer........: In laboratory
Material Designation: magnesium aluminate
Material Form.......: polycrystal
Composition.........: MgAl2O4
Processing..........: sintered
References:
[1] R. W. Rice, S. W. Freiman, and P. F. Becher, "Grain-Size Dependence of Fracture Energy in
Ceramics: I, Experiment"
Journal of the American Ceramic Society, Vol. 64, No. 6, pp. 345-350 (1981).
[2] R. L. Stewart and R. C. Bradt, "Fracture of Polycrystalline MgAl2O4"
Journal of the American Ceramic Society, Vol. 63, No. 11-12, pp. 619-623 (1980).
[3] G. D. Swanson, "Fracture Energies of Ceramics"
Journal of the American Ceramic Society, Vol. 55, No. 1, pp. 48-49 (1972).
[4] R. L. Stewart and R. C. Bradt, "Fracture of Single Crystal MgAl2O4"
Journal of Materials Science, Vol. 15, 67-72 (1980).
[5] A. G. Evans and E. A. Charles, "Fracture Toughness Determinations by Indentation"
Journal of the American Ceramic Society, Vol. 59, No. 7-8, pp. 371-372 (1985).
[6] G. K. Bansal and A. H. Heuer, "Precipitation Strengthening in Non-Stoichiometric Mg-Al Spinel"
Fracture Mechanics of Ceramics, Vol. 2, pp. 677-690 (1973).
[7] R. W. Rice, C. C. Wu, and K. R. McKinney, "Fracture and Fracture Toughness of
Stoichiometric MgAl2O4 Crystals at Room Temperature," Journal of Materials Science,
Vol. 31, pp. 1353-1360 (1996).
[8] C. Baudin, R. Martinez, and P. Pena, "High-Temperature Mechanical Behavior of
Stoichiometric Magnesium Spinel," Journal of the American Ceramic Society,
Vol. 78, pp. 1857-1862 (1995).
Property Table:
Temperature = 23 °C
Grain Porosity Fracture Fracture Measurement Measurement Comments
Size Toughness Energy Method Environment
[µm] [%] [MPa·m1/2] [J/m2]
------ -------- ------------ --------- ----------- ----------- --------------------------------
1.5 8 AMDCB air Ref. 1
2 7.5 AMDCB
6 8 AMDCB
100 7 AMDCB
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5 1.94 CF air Ref. 2; Material was hot pressed,
12 1.98 CF and E = 258 GPa
25 1.83 CF
38 1.97 CF
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0.3 10.4 DCB air Ref. 3a; E = 241 GPa
0.3 11.2 DCB 3b; E = 241 GPa
6 16.9 DCB 3a; E = 241 GPa
6 9.1 DCB 3b; E = 241 GPa
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1.18 CF Ref. 4; {100} crack plane
1.54 CF {110} crack plane
1.90 CF {111} crack plane
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1.3 ICS dry N2 Ref. 5; H = 16.0 GPa
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1.5 DT toluene Ref. 6; Plates with faces
parallel to {100}
spinel planes
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1.0 AMDCB air Ref. 7; {100} surface; <100> axis
1.7 AMDCB air {100} surface; <110> axis
1.6 AMDCB air {110} surface; <110> axis
1.2 AMDCB air {111} surface; <110> axis
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1.5 3.0 SENB air Ref. 8; density = 3.491 g/cm3
E = 258 GPa
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