Mechanical properties of ceria-calcia stabilized zirconia ceramics with alumina additions. Issue 11 (September 2021)

• Record Type: Journal Article
• Authors: Tovar-Vargas, D.; Roitero, E.; Anglada, M.; Jiménez-Piqué, E.; Reveron, H.
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 11(2021)
• Page Start: 5602
• Page End: 5612
• Publication Date: 2021-09
• Subjects: Ceria-stabilized zirconia -- Calcia -- Alumina -- Mechanical properties -- Aging; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.05.006
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: As a result of grain size reduction, strength and hardness for 10Ce-1CaO and 10Ce-1CaO-5Al2O3 increased compared to 10Ce-TZP. Aging resistance in all 10Ce-1CaO/ alumina composites. Measurement of KI c by SEVNB and VIF methods to corroborate the difference between the values obtained by both methods. Abstract: Ceria-stabilized zirconia-based composites have been developed aiming to obtain ceramic materials with enhanced hardness, strength, fracture toughness, and resistance to low temperature degradation. These composites are based on ceria-calcia stabilized zirconia (10 mol% CeO2 -1 mol% CaO TZP) and α-alumina (0−15 wt%) as a second phase. Raw materials in the form of powders were dispersed through ball milling, dried by slip casting, and subsequently grounded before being pressed and conventionally sintered at 1450 °C. Compared to the strength and hardness of 10Ce-TZP ceramics (typically 500 MPa and 6 GPa), an increase was observed for all compositions, especially for 10Ce-1CaO-5Al2 O3 (739 MPa and 10.2 GPa). Single Edge V-Notched Beam fracture toughness values ranged from 5.1 to 6.6 MPa∙√m, indicating a loss of transformability for all compositions. As in 10Ce-1CaO-TZP co-doped ceramics, the aging resistance of all alumina-containing composites was also excellent.