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

NC-350 ( Si3N4 )

Material Summary:

                      [Ref. 1,2]                         
Manufacturer........: Norton Co.          
Material Designation: NC-350 
Material Form.......: Polycrystal     
Composition.........: Si3N4             
Processing..........: Reaction sintered

References:

[1] G. R. Anstis, P. Chantikul, B. R. Lawn, and D. B. Marshall, "A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I, Direct Crack-Measurements" Journal of the American Ceramic Society, Vol. 64, No. 9, pp. 533-538 (1981).

[2] R. J. Gettings and G. D. Quinn, "Surface Crack in Flexure (SCF) Measurements of the Fracture Toughness of Advanced Ceramics," Ceramic Engineering and Science Proceedings, Vol. 16, pp. 539-544 (1995)

Property Table:

Temperature = 23 °C
Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
Size                 Toughness     Energy     Method       Environment
[µm]       [%]       [MPa·m1/2]     [J/m2] 
------   --------   ------------   ---------  -----------  -----------  --------------------------------
10                      2.71                    ICS           air        Ref. 1; E = 170 GPa
                        2.13                    IS                               E = 170 GPa
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                        1.65                    SCF           air        Ref. 2; E = 180 GPa, nu = 0.22,
                                                                                 density = 2.53 g/cm3
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