Effect of Sintering Temperature on Microstructure and Mechanical Properties of Al₂O₃-TiC-ZrO₂ Ceramic Composites

Abstract:

Al₂O₃-TiC-ZrO₂ ceramic composites (ATZ) were fabricated by hot-pressed sintering. The phases and microstructure of the composites were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The relative density and mechanical properties (flexural strength, fracture toughness and Vicker’s hardness) of the composites were tested. The results show that the microstructure of the composites was the gray core-white rim. With the increase of sintering temperature, the relative density and mechanical properties of the composites increased first and then decreased. The composite sintered at 1705°C has the highest synthetical properties, and its relative density, flexural strength, fracture toughness and Vickers hardness are 98.3%,970MPa,6.0 MPa•m^1/2 and 20.5GPa, respectively.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 1031-1035
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.1031
• Online since: February 2012
• Authors: Wei Min Liu, Xing Ai, Jun Zhao, Yong Hui Zhou
• Keywords: Composite, Mechanical Property, Microstructure, Sintering Temperature

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