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-132 ( Si3N4 )

Material Summary:

                      [Ref. 1,2,3,4,5,6,7]                         
Manufacturer........: Norton Co.          
Material Designation: NC-132  
Material Form.......: polycrystal     
Composition.........: Si3N4             
Processing..........: hot pressed

References:

[1] S. W. Freiman, A. Williams, J. J. Mecholsky, and R. W. Rice, "Fracture of Si3N4 and SiC" Ceramic Microstructures, pp. 824-834 (1976).

[2] R. W. Rice, S. W. Freiman, J. J. Mecholsky, R. Ruh, and Y. Harada, "Fractograph of Si3N4 and SiC" Ceramics for High Performance Applications (1977).

[3] G. K. Bansal, "Effects of Ceramic Microstructures on Strength and Fracture Surface Energy" Microstructures, pp. 860-871 (1976).

[4] 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).

[5] J.E. Ritter, S.V. Nair, P.A. Gennari, and W.A. Dunlay, "High-Strength Reaction-Bonded Silicon Nitride," Advanced Ceramic Materials, Vol. 3, pp. 415-417 (1988).

[6] G.D. Quinn, R.J. Gettings, and J.J. Kubler, "Fracture Toughness by the Surface Crack in Flexure (SCF) Method: Results of the VAMAS Round Robin," Ceramic Engineering and Science Proceedings, Vol. 15, pp. 846-855 (1994).

[7] J. Kubler, "Fracture Toughness of Ceramics Using the SEVNB Method: Preliminary Results," Ceramic Engineering and Science Proceedings, Vol. 18 (4), pp. 155-162 (1997).

Property Table:

Temperature = 23 °C
Grain    Porosity    Fracture      Fracture   Measurement  Measurement  Comments
Size                 Toughness     Energy     Method       Environment
[µm]       [%]       [MPa·m1/2]     [J/m2] 
------   --------   ------------   ---------  -----------  -----------  --------------------------------
[1-3]                    4           26         AMDCB         air        Ref. 1; Major additive/impurity = Mg
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                                     17         AMDCB         air        Ref. 2; E = 276 GPa
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[1-2]                                61.3       SENB          air        Ref. 3; E = 310 GPa; flaw moving
                                                                                 parallel to HP direction.
                                     42.2       SENB                             Flaw moving perpendicular
                                                                                 to HP direction.
                                     40.1       SENB                             Flaw plane perpendicular
                                                                                 to HP direction.
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 2                       4.0                    DCB           air        Ref. 4; E = 300 GPa
                         4.98                   ICS                              E = 370 GPa        
                         5.25                   IS                               E = 370 GPa
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                         4.0                    ICS           air        Ref. 5; 3.18 g/cm3
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                         4.6                    SCF           air        Ref. 6
--------------------------------------------------------------------------------------------------------
                         4.36                   SENB          air        Ref. 7; V-notch
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