Sintering and Crystallization of Al₂O₃-La₂O₃-ZrO₂ Eutectic Glass

Abstract:

High hardness nanoceramics with a Al₂O₃-La₂O₃-ZrO₂ eutectic composition were fabricated by sintering and crystallization of glass microspheres. Glass microspheres prepared by the flame spraying-water quenching technique were hot pressing sintered and converted to nanoceramics by controlled crystallization. The sintering densification mechanism of the glass microspheres and the effect of crystallization temperature on microstructure and mechanical properties of the prepared nanoceramics were investigated. The phases of the nanoceramics composed of LaAlO₃, ZrO₂ and LaAl₁₁O₁₈ at crystallization temperature above 1100°C. It was found that the nanoceramic obtained at 1300°C have a maximum hardness of 18.4 GPa, fracture toughness of 3.3 MPa m^1/2.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 261-265
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.261
• Online since: August 2018
• Authors: Gang He, Jia Xi Liu, Nan Lu, Guang Hua Liu, Jiang Tao Li*
• Keywords: Crystallization, Eutectic Glass, Hardness, Nanoceramics, Sintering

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