Microstructures, Properties and In Situ Toughening of Rapidly Solidified Al2O3/YSZ Composite Ceramics Prepared by Combustion Synthesis-Reference-Cited by-同舟云学术

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

Published:2008-02 Issue: Volume:368-372 Page:771-774
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Zhao Zhong Min¹,Zhang Long¹,Song Yi Gang²,Wang Wei Guo³

Affiliation:

1. Mechanical and Engineering College

2. Mechanical Engineering College

3. Shijiazhuang Mechanical Engineering College

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.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.368-372.771.pdf

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