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    YANG Quan, ZHAO Zhong-min, ZHANG Long, PAN Chuan-zeng, SONG Ya-lin, LIU Ming-jun. Effect of ZrO2 Content on Rapidly Solidified Composite Ceramic Al2O3/ZrO2(4Y) Prepared by Combustion Synthesis under High Gravity[J]. Materials and Mechanical Engineering, 2009, 33(8): 40-45.
    Citation: YANG Quan, ZHAO Zhong-min, ZHANG Long, PAN Chuan-zeng, SONG Ya-lin, LIU Ming-jun. Effect of ZrO2 Content on Rapidly Solidified Composite Ceramic Al2O3/ZrO2(4Y) Prepared by Combustion Synthesis under High Gravity[J]. Materials and Mechanical Engineering, 2009, 33(8): 40-45.
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    Effect of ZrO2 Content on Rapidly Solidified Composite Ceramic Al2O3/ZrO2(4Y) Prepared by Combustion Synthesis under High Gravity

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    • Based on combustion synthesis technology under high gravity to prepare rapidly solidified composite ceramic Al2O3/ZrO2 (4Y),the influence of ZrO2 content on microstructure and properties of solidified composite ceramics Al2O3/ZrO2 (4Y) was investigated through XRD,SEM and EDS.The results show that the main microstructure of the ceramic was rod-shaped eutectic colonies as the ZrO2 content was in the range of 34.1%-46.4%,and the microstructure transformed to be isolated spherically-shaped ZrO2 grains as the ZrO2 content was in the range of 49.6%-53.7%.With the ZrO2 content increasing,the relative density of the ceramic decreased,the maximum value was 94.3%,whereas the hardness and the fracture toughness increased first and then decreased.The maximum hardness value of the composite ceramic reached 13.1 GPa as the ZrO2 content was 426%,and the maximum fracture toughness value of 13.5 MPa·m1/2 was also obtained.
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