Journal of South China University of Technology(Natural Science Edition) ›› 2004, Vol. 32 ›› Issue (7): 1-4.

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Mechanical Properties of Low-temperature Sintered Al2O3/3Y-TZP Composites

Rao Ping-gen Wu Jian-qing Ye Jian-dong Lǜ Ming   

  1. College of Materials Science and Engineering, South China Univ .of Tech ., Guangzhou 510640, Guangdong, China
  • Received:2004-01-13 Online:2004-07-20 Published:2015-09-09
  • Contact: 饶平根(1965 -), 男, 副教授, 主要从事高性能陶瓷复合材料的研究. E-mail:pgrao@scut.edu.cn
  • About author:饶平根(1965 -), 男, 副教授, 主要从事高性能陶瓷复合材料的研究.

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Abstract: The m(Al2O3)∶m(3Y-TZP)=85∶15 composites were prepared by mixing the high-activity low-temperature sinterable Al2O3 with ZrO2(x(Y2O3)=3%)powders .The powder compacts were then sintered at 1350 ～ 1500 ℃for 2 hours in air .A relative density more than 0 .99 was achieved for the samples sintered at a lower temperature of 1425 ℃.The phase compositions and microstructures of the samples were investigatd by X-ray diffraction and a scan-ning electron microscope ,respectively .The effects of the phase composition and the microstructure on the mechanical properties of the Al2O3/3Y-TZP composites were also studied .The results indicate that the composites sintered at 1 425 ℃is of optimum mechanical properties, that is , a bending strength of 856 MPa , a fracture toughness of 7.4MPa°m1/2 and a Vickers hardness of 16.4GPa . 

Key words: Al2O3, 3Y-TZP, low-temperature sintering, mechanical property 

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