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dc.contributor.authorBhattacharyya, S-
dc.contributor.authorPratihar, S K-
dc.contributor.authorSinha, R K-
dc.contributor.authorBehera, R C-
dc.contributor.authorGanguly, R I-
dc.identifier.citationMaterials Letters, Vol 53, Iss 6, P 425-431en
dc.descriptionCopyright of this article belongs to Elsevier Science Ltden
dc.description.abstractMicrocomposites 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.en
dc.format.extent476745 bytes-
dc.subjectAlumina–zirconia microcompositesen
dc.subjectPowder processingen
dc.titlePreparation of alumina–high zirconia microcomposite by combined gel-precipitationen
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