Influence of a Piezoelectric Secondary Phase on Thermal Shock Resistance of Alumina-Matrix Ceramics

• Published in: Journal of the American Ceramic Society Vol. 85; no. 3; pp. 718 - 720
• Main Authors: Wang, Lin, Shi, Jian-Lin, Gao, Jian-Hua, Yan, Dong-Sheng
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.03.2002; Blackwell
• Subjects: alumina; Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Exact sciences and technology; neodymium/neodymium composites; Structural ceramics; Technical ceramics; thermal shock/thermal shock resistance; Neodymium Titanates; Thermal shock resistance; Mechanical properties; Piezoelectric properties; Thermomechanical properties; Dispersion reinforced material; Experimental study; Microstructure; Alumina; Oxide ceramics; Composite material; Structural ceramic
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.2002.tb00160.x

Using monolithic alumina ceramics as the reference, the thermal shock behavior of the hot‐pressed alumina matrix ceramics with 3 mol% neodymium titanate was investigated. The thermal shock resistance of the materials was evaluated by water quenching and a subsequent three‐point bending test to determine the flexural strength degradation. The hot‐pressed composite exhibited a temperature differential of the thermal shock resistance 120°C higher than the monolith, mainly because of significantly improved fracture toughness.