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

SNW-1000 ( Si3N4 )

Material Summary:

                      [Ref. 1,2,3]                         
Manufacturer........: GTE Sylvania          
Material Designation: SNW-1000  
Material Form.......: polycrystal     
Composition.........: Si3N4             
Processing..........: sintered

References:

[1] T.E. Easler, R.C. Bradt, and R.E. Tressler, "Effects of Oxidation and Oxidation Under Load on Strength Distributions of Si3N4," Journal of the American Ceramic Society, Vol. 65, pp. 317-320 (1982).

[2] C.A. Tracy and G.D. Quinn, "Fracture Toughness by the Surface Crack in Flexure (SCF) Method," Ceramic Engineering and Science Proceedings, Vol. 15, pp. 837-845 (1994).

[3] G. D. Quinn, J. J. Swab, and M. D. Hill, "Fracture Toughness by the Surface Crack in Flexure (SCF) Method: New Test Results," Ceramic Engineering and Science Proceedings, Vol. 18 (4), pp. 163-172 (1997).

Property Table:

Temperature = 23 °C
Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
Size                 Toughness     Energy     Method       Environment
[µm]       [%]       [MPa·m1/2]     [J/m2] 
------   --------   ------------   ---------  -----------  -----------  --------------------------------
                         4.0                      CF           air       Ref. 1; 3.00 g/cm3; E = 240 GPa
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    <5 5 4.7 scf air ref. 2; 3.26 g />cm3; E = 248 GPa
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                         6.4                      SCF          air       Ref. 3; 3.29 g/cm3; E = 281 GPa
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