Sintering and Characterization of Polycrystalline Monoclinic, Tetragonal, and Cubic Zirconia

• Published in: Journal of the American Ceramic Society 1992-08, Vol.75 (8), p.2173-2183
• Main Authors: Cutler, Raymond A., Reynolds, James R., Jones, Aaron
• Format: Article
• Language: English
• Subjects: 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360203 - Ceramics, Cermets, & Refractories- Mechanical Properties; 360204 - Ceramics, Cermets, & Refractories- Physical Properties; Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; CHALCOGENIDES; CHEMICAL COMPOSITION; Chemical industry and chemicals; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; Exact sciences and technology; FABRICATION; ferroelastic materials; FINE STRUCTURE; FRACTURE PROPERTIES; fracture toughness; GRAIN SIZE; HEAT TREATMENTS; MATERIALS SCIENCE; MATERIALS WORKING; MECHANICAL PROPERTIES; microcracking; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; PHASE STABILITY; polycrystalline materials; POLYCRYSTALS; SINTERING; SIZE; STABILITY; Structural ceramics; Technical ceramics; TEMPERATURE RANGE; TEMPERATURE RANGE 1000-4000 K; TETRAGONAL LATTICES; THERMOMECHANICAL TREATMENTS; TRANSITION ELEMENT COMPOUNDS; zirconia; ZIRCONIUM COMPOUNDS; ZIRCONIUM OXIDES
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.1992.tb04480.x

Polycrystalline monoclinic (m), tetragonal (t), and cubic (c) ZrO2, sintered at 1500°C, were annealed in the cubic stability field and rapidly cooled to permit the displacive c→t′ transformation to occur in compositions containing 0–6 mol% Y2O3. The bulk fracture toughness of coarse‐grained (> 25 μm) m, t′, and c zirconias were compared with conventionally sintered, fine‐grained (typically less than 1 μm) materials. The ferroelastic monoclinic and tetragonal zirconias were more than twice as tough as paraelastic cubic zirconia.