Subbarao, E. C. ; Srikanth, V. ; Walck, J. C. ; Tarry, C. A. (1992) Acoustic emission study of Si3N4 MRS Proceedings, 287 . pp. 441-446. ISSN 1946-4274
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Official URL: http://journals.cambridge.org/action/displayAbstra...
Related URL: http://dx.doi.org/10.1557/PROC-287-441
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Cambridge University Press. |
| ID Code: | 96435 |
| Deposited On: | 19 Dec 2012 10:36 |
| Last Modified: | 19 Dec 2012 10:36 |
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