Changes in Microstructures and Properties of Al₂O₃/ZrO₂ (Y₂O₃) with Different Content of ZrO₂

Abstract:

Based on preparation of Al2O3/ZrO2 (4Y) by combustion synthesis in high-gravity field, the microstructure transformation and properties of the materials are investigated through adjusting the ZrO2 (4Y) content in the composites. As the content of ZrO2 changed from 37% to 40%, the microstructures of the ceramics transformed the sphere-like tetragonal ZrO2 crystals from the rod-shaped colonies with nanocrystalline structures. Al2O3/33%ZrO2 (4Y) had the maximum relative density, hardness and flexural strength due to the low solidification temperature, the highest volume fraction of the colonies, small-size defect and high fracture toughness, whereas Al2O3/44%ZrO2 (4Y) was somewhat weakened in strength in despite of its highest fracture toughness.

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 1-4
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.1
• Online since: April 2010
• Authors: Chuan Zeng Pan, Long Zhang, Zhong Min Zhao, Zhen Sheng Qu, Quan Yang, Xue Gang Huang
• Keywords: Al₂O₃/ZrO₂ (Y₂O₃) Composite, Combustion Synthesis (CS), High Gravity, Rapid Solidification

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