NT-154 ( Si3N4 )
Reference: NIST Technical Note
Reference: NIST Structural Ceramics Database
Note: About Property Data Summaries.
Note: Abbreviations and Other Notes
Note: Other Materials
Material Summary:
[Ref. 1,2,3]
Manufacturer........: Norton/TRW
Material Designation: NT-154
Material Form.......: polycrystal
Composition.........: Si3N4
Processing..........: sintered and
hot isostatically pressed
References:
[1] N.L. Hecht, D.E. McCullum, and G.A. Graves, "Investigation of Selected Si3N4 and SiC Ceramics,"
Ceramic Materials and Components for Engines, pp. 806-816 (1988).
[2] D.E. McCullum, N.L. Hecth, L. Chuck, and S.M. Goodrich, "Summary of Results of the Effects of
Environment on Mechanical Behavior of High-Performance Ceramics," Ceramic Engineering and Science
Proceedings, Vol. 12, pp. 1886-1913 (1991).
[3] 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]
------ -------- ------------ --------- ----------- ----------- --------------------------------
3.8 ICS air Ref. 1; 3.24 g/cm3; E = 314 GPa;
H = 14 GPa
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3.2 CF air Ref. 2; 3.23 g/cm3; E = 310 GPa;
H = 15.9 GPa
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3.70 SCF air Ref. 3; E = 320 GPa, nu = 0.27,
density = 3.23 g/cm3
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