The Effects of MgO Content on the Mechanical Properties and Microstructures of Al₂O₃-TiN-TiC Ceramic Materials

Abstract:

Al₂O₃-TiN-TiC ceramic materials with different MgO content were fabricated by hot-pressing technique. The MgO volume percent was varied from 0vol% to 5vol%. The mechanical properties such as flexural strength, Vickers hardness and fracture toughness were tested. The phase composition of the sintered body was analyzed by XRD while the microstures of the sintering body were observed by OM (Optical Microscope) and SEM. The effects of MgO content on the mechanical properties and microstructures of Al₂O₃-TiN-TiC were investigated. The results shows that the addition of MgO can change the phase composition of the sintered ceramic materials which displayed with diverse solid solutions and intermetallic compounds. Meanwhile the new sintering products changed the the microstructure morphology which made the crack path complex and affected the mechanical properties.

• Periodical: Advanced Materials Research (Volume 500)
• Pages: 623-628
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.500.623
• Online since: April 2012
• Authors: Yu Huan Fei, Chuan Zhen Huang, Han Lian Liu, Bin Zou
• Keywords: Al₂O₃-TiN-TiC Ceramic, Mechanical Property, MgO Addition, Microstructure

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