Paper Title:
Microstructures, Properties and In Situ Toughening of Rapidly Solidified Al2O3/YSZ Composite Ceramics Prepared by Combustion Synthesis
  Abstract

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.

  Info
Periodical
Key Engineering Materials (Volumes 368-372)
Edited by
Wei Pan and Jianghong Gong
Pages
771-774
DOI
10.4028/www.scientific.net/KEM.368-372.771
Citation
Z. M. Zhao, L. Zhang, Y. G. Song, W. G. Wang, "Microstructures, Properties and In Situ Toughening of Rapidly Solidified Al2O3/YSZ Composite Ceramics Prepared by Combustion Synthesis", Key Engineering Materials, Vols. 368-372, pp. 771-774, 2008
Online since
February 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: K. Konopka
Abstract:The present paper is focused on ceramic–metal composites obtained via different technologies which leads to different microstructures in...
139
Authors: Hua Zhang Zhai, Hong Nian Cai, Xiao Zhan Yang, Jian Bao Li, Gang Feng Guo, Chuan Bao Cao
Abstract:A series of BN-SiO2 composite ceramics with high relative densities have been fabricated by hot pressing of a mixture of hexagonal boron...
1426
Authors: Tao Jiang, Hai Yun Jin, Zhi Hao Jin, Jian Feng Yang, Guan Jun Qiao
Abstract:The machinable B4C/BN ceramics composites were fabricated by hot-pressing sintering process at 1850oC for 1h under the pressure of 30MPa....
53
Authors: Kai Jin Huang, Li Yan, Hua Min Kou, Chang Sheng Xie
Abstract:Based on the combined toughening principle, pure Al2O3/AlB12/Al composite ceramic powders have been synthesized using a new laser-induction...
596
Authors: You Jun Lu, Hong Fang Shen, Yan Ming Wang
Composites
Abstract:High-temperature mechanical properties, machinability, oxidation resistance and thermal shock resistance of different content of carbon...
276