Influences of Mechanical Vibration on Rapidly Solidified Al_2O_3/YSZ Ceramics Prepared by Combustion Synthesis

作     者：ZHAO Zhong-min ZHANG Long WANG Wei-guo ZHANG Shi-yue 

作者机构：Institute of Advanced Materials Mechanical Engineering College Shijiazhuang 050003 China Science Research Department Mechanical Engineering College Shijiazhuang 050003 China Foreign Training Department Mechanical Engineering College Shijiazhuang 050003 China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2006年第19卷第B12期

页      面：27-30页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：National Natural Science Foundation of China (50672131) 

主　　题：ceramic matrix composite combustion synthesis rapid solidification nanocrystalline microstructure mechanical vibration 

摘      要：Al2O3/YSZ composite ceramics was fabricated with combustion synthesis technology, and the influences of mechanical vibration on its microstructures and properties were investigated. It is found that under the mechanical vibration of ever-increasing frequency, increasing combustion temperature, accelerating ceramics/metal liquid-liquid separation and quickening ceramic solidification could not only reduce the average diameter and the size distribution of aligned ZrO2 nano-micron fibers in rod-shaped Al2O3 matrix grains, but also make the randomly-oriented rod-shaped grains finer and increase their aspect ratios. As a result, a remarkable increase in flexural strength and fracture toughness of the ceramics can be observed.