Importance of Phase Equilibria on Process Control of Si3N4 Fabrication

  • F. F. Lange
Part of the Army Materials Technology Conference Series book series (volume 1)


In order to understand and develop materials, some material scientists are striving to establish interrelations between fabrication, composition (or phase equilibria), microstructure and properties. Knowledge of these interrelations leads to the anticipation of engineering problems in using the material and to the routes to material improvement. Important interrelations have been uncovered for the family of silicon nitride alloys fabricated with a densification aid. These interrelations will be the subject of this review; interrelation between composition and properties will be emphasized.


Creep Rate Eutectic Composition Glass Phase Glassy Phase Diffusional Creep 
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  1. Bowen, L. J., Weston, R. J., Carruthers, T. G. and Brook, R. J., 1972, Hot-Pressing and the a-3 phase transformation in Si3N4, J. Mat. Sci. 13: 341.CrossRefGoogle Scholar
  2. Clark, D. R., 1979, On the detection of thin intergranular films by electron microscopy, U1tramicroscopy, 4: 33.CrossRefGoogle Scholar
  3. Clarke, D. R. unpublished TEM micrograph.Google Scholar
  4. Clarke, D. R. and Lange, F. F., 1978, Oxidation of Sii3N4-SiO2-MgO System, to be published.Google Scholar
  5. Gauckler, L. J., Lukas, H. L. and Petzow, G., 1975, Determination of the phase diagram Si3N4-AlN-Al2O3-SiO2, J. Am. Ceram. Soc. 58: 346.CrossRefGoogle Scholar
  6. Huseby, I. G., Lukas, H. L., Petzow, G., 1975, Phase equilibria in the system Si3N4-SiO2-BeO-Be3N2, J. Am. Ceram. Soc. 58: 377.CrossRefGoogle Scholar
  7. Iskoe, J. L. and Lange, F. F., 1977, Development of microstructure and mechanical properties during hot-poressing of Si3N4, in “Ceramic Microstructure ’76,” ed. by R. M. Fulrath and J. A. Pask, Westview Press.Google Scholar
  8. Lange, F. F., Davis, B. I., and Clarke, D. R., 1979, Compressive creep of Si3N4/MgO alloys: I. effect of composition, II, source of viscoelastic effect; III. effects of oxidation induced compositional change, to be published (Rockwell Science Center Rept. SC5099.2AR).Google Scholar
  9. Lange, F. F., 1978, Phase relations in the system Si3N4-SiO2-MgO and their interrelations with strength and oxidation, J. Am. Ceram. Soc. 61: 53.CrossRefGoogle Scholar
  10. Lange, F. F., 1979a, Silicon nitride alloy systems: fabrication, microstructure and properties, Met. Rev. Inter., to be published (Rockwell Science Center Rept. #SC-PP-79-20).Google Scholar
  11. Lange, F. F., 1979b, Compressive surface stresses developed in ceramics by an oxidation-induced phase change, Am. Ceram. Soc. (in press).Google Scholar
  12. Lange, F. F., 1979c, Eutectic studies in the Si3N4-Si2N2O-Mg2SiO4-MgO system, J. Am. Ceram. Soc. (in press).Google Scholar
  13. Lange, F. F. Singhal, S. C., and Kuznicki, R. C., 1977, Phase relations and stability studies in the Si3N4-SiO2-Y2O3 pseudoternary system, J. Am. Ceram. Soc. 60: 249.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • F. F. Lange
    • 1
  1. 1.Structural Ceramics GroupRockwell International Science CenterThousand OaksUSA

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