Fracture Toughness / Fracture Energy Data for Ceramics

NIST Standard Reference Database 138


Reference:

Reference: NIST Structural Ceramics Database

Other material collections: Property Data Summaries



Other Toughness materials

Beta Alumina ( Al2O3 )

Material Summary:


                      [Ref. 1]       [Ref. 2a]           [Ref. 2b]       
Manufacturer........: NRL            Union Carbide       Cerametec
Material Designation: beta alumina   beta alumina        beta alumina
Material Form.......: Polycrystal    Single Crystal      Polycrystal  
Composition.........: Al2O3           93.6% Al2O3,         90.55% Al2O3,
  (mass fraction)                     6.4% Na2O           8.7% Na2O, 0.75% Li2O
Processing..........: 

References:

[1] J. J. Mecholsky, S. W. Freiman, and R. W. Rice, "Fracture Surface Analysis of Ceramics" Journal of Materials Science, Vol. 11, pp. 1310-1319 (1976).

[2] D. C. Hitchcock and L. C. De Jonghe, "Fracture Toughness Anistropy of Sodium Beta-Alumina" Journal of the American Ceramic Society, Vol. 66, No. 11, pp. C-204-C-205 (1983),

Property Table:

    Temperature = 23 °C
    Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
    Size                 Toughness     Energy     Method       Environment
    [µm]       [%]       [MPa·m1/2]     [J/m2]
    ------   --------   ------------   ---------  -----------  -----------  --------------------------------
    5-20                                  13        AMDCB          air       Ref. 1; E = 210 GPa
    --------------------------------------------------------------------------------------------------------
    0.16                     ICS            air       Ref. 2a; Plane of indentation
    = prismatic, E = 174 GPa
    1.97                     ICS                           2a; Plane of indentation
    = basal, E = 215 GPa
    1.1                    1.98                     ICS                           2b
    --------------------------------------------------------------------------------------------------------