Gandhi, A. S. ; Jayaram, V. (2003) Plastically deforming amorphous ZrO2-Al2O3 Acta Materialia, 51 (6). pp. 1641-1649. ISSN 1359-6454
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S13596...
Related URL: http://dx.doi.org/10.1016/S1359-6454(02)00566-9
Abstract
We report for the first time non-viscous, plastic deformation in an amorphous oxide: ZrO2-Al2O3. Dense samples of amorphous ZrO2-Al2O3 made by hot pressing spray-pyrolysed powder were deformed in uniaxial compression at 600-700°C at strain rates from 6×10-5 s-1 to 10-3 s-1. A transition from elastic to plastic deformation occurred at a critical stress ~360 MPa. The onset of plastic deformation was associated with a drop in the stress by 20-25%. Little influence of strain and strain rate on the flow stress was observed. The non-viscous, plastic deformation is related to the open structure of the amorphous phase as indicated by its low true density.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Amorphous Oxides; Plastic Deformation; Shear Bands; Compression Test |
| ID Code: | 13676 |
| Deposited On: | 12 Nov 2010 15:08 |
| Last Modified: | 04 Jun 2011 07:09 |
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