Please use this identifier to cite or link to this item:
http://hdl.handle.net/2080/40
Title: | Preparation of alumina–high zirconia microcomposite by combined gel-precipitation |
Authors: | Bhattacharyya, S Pratihar, S K Sinha, R K Behera, R C Ganguly, R I |
Keywords: | Alumina–zirconia microcomposites Gel-precipitation Powder processing |
Issue Date: | Apr-2002 |
Publisher: | Elsevier |
Citation: | Materials Letters, Vol 53, Iss 6, P 425-431 |
Abstract: | Microcomposites of alumina and zirconia containing equal volume fractions of the two are prepared by a combined gel-precipitation route using aluminium chloride and zirconium oxychloride as precursors. Dried gel powders calcined between 375 and 800 °C show cubic phase as the only crystalline phase. Zirconia gets converted to tetragonal phase above 900 °C and is retained mostly in this form upto 1000 °C. At the higher temperatures, it converts to the monoclinic phase. Alumina starts to crystallize into -form at 900 °C and is converted to -form at 1250 °C. Pressed pellets sintered at 1400 °C achieve densities close to theoretical in 4 h. Microstructures show evidence of segregation and coarsening in a composite matrix of alumina and zirconia mixed at a submicron level. |
Description: | Copyright of this article belongs to Elsevier Science Ltd |
URI: | http://hdl.handle.net/2080/40 |
Appears in Collections: | Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
bhatta4.pdf | 465.57 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.