Microstructures,Properties and In-situ Toughening of Rapidly Solidified Al2O3/YSZ Composite Ceramics Prepared by Combustion Synthesis
The large-scale Al2O3/YSZ ceramic plates were prepared by combustion synthesis under high gravity,the ceramics were mainly composed of random-oriented rod-shaped grains,and within the rod-shaped grain aligned nano-submicron YSZ fibers were embedded.Compared to the high-performance directionally solidified ceramics,the hardness,flexural strength and fracture toughness of the eutectic ceramics obtained in the experiment increased by 40.7~55.1%,9.6~26.0% and 172.0~240.0%,respectively.The increase in hardness and strength of the ceramics could be attributed to nano-submicron YSZ fibers and inter-phase spacing and the refinement of the eutectic grains; meanwhile,high-energy,large-angle boundaries between rod-shaped grains could introduce strong toughening mechanisms involving crack-bridging and pull-out of rod-shaped eutectics.
Rod-shaped eutectics Nanocrystalline Combustion synthesis Rapid solidification
Zhongmin Zhao Long Zhang Yigang Song Weiguo Wang
Institute of Advanced Materials,Shijiazhuang Mechanical Engineering College,Hebei 050003,China Science Research Department,Shijiazhuang Mechanical Engineering College,Hebei 050003,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
771-774
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）