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

Titanium Diboride ( TiB2 )

Material Summary:

                      [Ref. 1,a]               [Ref. 1,b]               [Ref. 1,c]               [Ref. 1,d]
Manufacturer........: ORNL                     ORNL                     ORNL                     ORNL
Material Designation: titanium diboride        titanium diboride        titanium diboride        titanium diboride
Material Form.......: polycrystal              polycrystal              polycrystal              polycrystal
Composition.........: TiB2                     TiB2                      TiB2 + 7.9 % Ni          TiB2 + 1.4 % Ni
Processing..........: Hot pressed at 2000 °C   Hot pressed at 1800 °C   Hot pressed at 1425 °C   Hot pressed at 1425 °C
                      [Ref. 2]                 [Ref. 3]                 [Ref. 4]                 [Ref. 5]
Manufacturer........: In laboratory            In laboratory            In laboratory            In laboratory
Material Designation: titanium diboride        titanium diboride        titanium diboride        titanium diboride
Material Form.......: polycrystal              polycrystal              polycrystal              polycrystal
Composition.........: TiB2                     TiB2                      TiB2                     TiB2 + 6 % TaB2 + 1 % CoB
Processing..........: Sintered at 1900 °C      Hot pressed at 1800 °C   Hot pressed              Hot pressed at 1500 °C
                      [Ref. 6,a]               [Ref. 6,b]
Manufacturer........: Sylvania                 Sylvania
Material Designation: Osram 3120               Osram 3122
Material Form.......: polycrystal              polycrystal
Composition.........: TiB2                     TiB2
Processing..........: Gas phase sintered       Gas phase sintered

References:

[1] M. K. Ferber, P. F. Becher, and C. B. Finch, "Effect of Microstructure on the Properties of TiB2 Ceramics" Journal of the American Ceramic Society, Vol. 66, No. 1, pp. C-2-C-4 (1983).

[2] H.R. Baumgartner and R.A. Steiger, "Sintering and Properties of Titanium Diboride Made from Powder Synthesized in a Plasma-Arc Heater," Journal of the American Ceramic Society, Vol. 67, pp. 207-212 (1984).

[3] H. Itoh, S. Naka, T. Matsudaira, and H. Hamamoto, "Preparation of TiB2 Sintered Compacts by Hot Pressing," Journal of Materials Science, Vol. 25, pp. 533-536 (1990).

[4] 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).

[5] V. C. Kokabi, K. Shobu, and T. Watanabe, "Studies of the Mechanical Properties of TiB2- 6% TaB2 - 1% CoB - x% mZrO2," Journal of the European Ceramic Society, Vol. 17, pp. 885-890 (1997).

[6] 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] 
------   --------   ------------   ---------  -----------  -----------  --------------------------------
 40.                   3.7                      ICS           air       Ref. 1,a; E = 503 GPa; nu = 0.111
  4.5                  5.75                     ICS           air       Ref. 1,b; E = 563 GPa; nu = 0.099
  7                    4.25                     ICS           air       Ref. 1,c; E = 536 GPa
  4                    6.4                      ICS           air       Ref. 1,d; E = 569 GPa; nu = 0.15
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                       4.87                     DT            air       Ref. 2;   E = 537 GPa
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                       2.3                      ICS           air       Ref. 3;   4.47 g/cm3; H = 28 GPa
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 10         2          5.14                     SCF           air       Ref. 4;   E = 545 GPa
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                       4.6                      IS            air       Ref. 5;   E = 530 GPa
                       6.0                      SENB          air       Ref. 5;   E = 530 GPa
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                       5.20                     SCF           air       Ref. 6a;  E = 542 GPa; nu = 0.12 
                                                                                  density = 4.64 g/cm3
                       5.36                     SCF           air       Ref. 6b;  E = 581 GPa; nu = 0.12 
                                                                                  density = 4.67 g/cm3
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