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Acoustic Emission Study of Si3N4

Published online by Cambridge University Press:  25 February 2011

E. C. Subbarao ,
V. Srikanth ,
J. C. Walck  and
C. A. Tarry
E. C. Subbarao
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
V. Srikanth
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
J. C. Walck
Affiliation:
GTE Products Corporation, Towanda, PA 18848
C. A. Tarry
Affiliation:
GTE Products Corporation, Towanda, PA 18848
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Abstract

Sintered Si3N4 (with 2 w/o A12O3 and 6 w/o Y2O3) was studied by acoustic emission method during indentation testing and during heating to and cooling from 920ºC in air. The acoustic emission activity was discontinous and its magnitude and duration increased with load applied during indentation testing. Intense acoustic emission signals were detected on cooling Si3N4 ceramics to temperatures below 590ºC, particularly below 450ºC. X-ray diffraction studies showed the presence of SiO2 (Quartz) after heating the sample to 920ºC during acoustic emission study, compared to single phase β Si3N4 before the heat treatment.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 287: Symposium K – Silicon Nitride Ceramics–Scientific and Technological Advances , 1992 , 441
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

1. Ziegler, G., Heinrich, J. and Wotting, G., J. Mater. Sci. 22, 3041 (1987).Google Scholar
2. Weiss, J., Ann. Rev. Mater. Sci. 11, 381 (1981).Google Scholar
3. Du, H., Tressler, R. E., Spear, K. E. and Pantano, C. G., J. Electrochem. Soc. 136, 1527 (1989).Google Scholar
4. Bonnell, D. A., Tien, T. Y. and Ruhle, M., J. Am. Ceram. Soc. 70, 40 (1987).Google Scholar
5. Lange, F. F., Singhal, S. C., and Kuznicki, R. C., J. Am. Ceram. Soc. 60, 249 (1977).Google Scholar
6. Srikanth, V. and Subbarao, E. C., Ceram. Intl. 18, 251 (1992).Google Scholar
7. Srikanth, V. and Subbarao, E. C., Acta. Metall. 40, 1091 (1992).Google Scholar
8. Subbarao, E. C. and Srikanth, V., Physica C171, 449 (1990).Google Scholar
9. Subbarao, E. C., Srikanth, V., Cao, W. and Cross, L. E., Submitted for Publication.Google Scholar