Addition of rare earth and diopside to improve performances of alumina matrix ceramic materials. (June 2013)

• Record Type: Journal Article
• Authors: Liu, C. X.; Sun, J. L.; Yao, M. H.
• Is Part Of: Materials research innovations. Volume 17:Number 4(2013)
• Page Start: 293
• Page End: 297
• Publication Date: 2013-06
• Subjects: Alumina, -- Diopside, -- Mixed rare earth, -- Mechanical properties, -- Microstructures; Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1433075X12Y.0000000075
• Languages: English
• ISSNs: 1432-8917

Abstract

Abstract : In the present work, mixed rare earth and diopside were simultaneously introduced in alumina matrix ceramic materials. Composites were fabricated by hot press sintering, during which liquid phase, leading to interface reactions between alumina matrix and additives, was formed. Hardness, fracture toughness and bending strength of the composites were measured. Microstructure observations on fracture surfaces of alumina matrix ceramic materials were analysed. Results showed that diopside, as a sintering assistant, could prompt the formation of transient liquid phase as well as carbides and nitrides of rare earth elements and thus contributed to improve the mechanical properties of alumina matrix ceramic materials.