Thangamani, Nithyanantham ; Gandhi, Ashutosh S. ; Jayaram, Vikram ; Chokshi, Atul Harish (2005) Low-temperature high-Pressure consolidation of amorphous Al2O3-15 mol% Y2O3 Journal of the American Ceramic Society, 88 (10). pp. 2696-2701. ISSN 0002-7820
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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1551-...
Related URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00502.x
Abstract
This study examined pressure consolidation of amorphous Al2O3-15 mol% Y2O3 powders prepared by co-precipitation and spray pyrolysis. The two amorphous powders had similar true densities and crystallization sequences. Uniaxial hot pressing was carried out at 450°-600°C with a moderate pressure of 750 MPa. The co-precipitated powder could be hot pressed to a maximum relative density of 98% and remained amorphous. Pressure adversely affected the densification of the spray-pyrolyzed powder by favoring an early crystallization of γ-Al2O3 phase at 580°C. Plastic deformation of the amorphous phase is believed to be responsible for the large densification of the amorphous powders.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Ceramic Society. |
| ID Code: | 13547 |
| Deposited On: | 12 Nov 2010 15:22 |
| Last Modified: | 23 Feb 2011 07:01 |
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