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

Lucalox ( Al2O3 )

Material Summary:

                      [Ref. 1-5]       
Manufacturer........: GE              
Material Designation: Lucalox          
Material Form.......: Polycrystal      
Composition.........: 99.9% Al2O3  
  (mass fraction)
Processing..........: 

References:

[1] S. W. Freiman, K. R. McKinney, and H. L. Smith, "Slow Crack Growth in Polycrystalline Ceramics" Fracture Mechanics of Ceramics, Vol. 2, pp. 659-676 (1974).

[2] L. A. Simpson, "Microstructural Considerations for the Application of Fracture Mechanics Techniques" Fracture Mechanics of Ceramics, Vol. 2, pp. 567-577 (1974).

[3] P. L. Gutshall and G. E. Gross, "Obervations and Mechanisms of Fracture in Polycrystalline Alumina" Engineering Fracture Mechanics, Vol. 1, pp. 463-471 (1969).

[4] G. D. Swanson and G. E. Gross, "Factor Analysis of Fracture-Toughness Test Parameters for Al2O3" Journal of the American Cermic Society, Vol. 54, No. 8, pp. 382-384 (1971).

[5] S. S. Smith and B. J. Pletka, "Indentation Fracture of Single Crystal and Polycrystalline Aluminum Oxide" Fracture Mechanics of Ceramics, Vol. 6, pp. 189-209 (1983).

Property Table:

Temperature = 23 °C
Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
Size                 Toughness     Energy     Method       Environment
[µm]       [%]       [MPa·m1/2]     [J/m2] 
------   --------   ------------   ---------  -----------  -----------  ----------------------------
35 [30-40]               4.1         22         AMDCB          air       Ref. 1; KIc obtained at a
                                                                                 velocity of 10-4 m/s
--------------------------------------------------------------------------------------------------------
35                                   20.3       SENB           air       Ref. 2
                                     32.1       DCB           
--------------------------------------------------------------------------------------------------------
10                                   18         DCB            air       Ref. 3
30                                   27         DCB
45                                   46         DCB
--------------------------------------------------------------------------------------------------------
10                       3.38                   DCB                      Ref. 4
30                       5.26                   DCB
--------------------------------------------------------------------------------------------------------
18                       5.25                   ICS            air       Ref. 5; E = 354 GPa
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