Microstructure and mechanical properties of Al2O3/ZrO2 eutectic ceramic composites prepared by explosion synthesis

被引：33
|
作者：
Zheng, Yongting [1 ]
Li, Hongbo [1 ]
Zhou, Tao [1 ]
Zhao, Jing [1 ]
Yang, Pan [1 ]
机构：
[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150001, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 551卷
基金：
中国国家自然科学基金;
关键词：
ZrO2-Al2O3; Eutectic ceramic; Explosion synthesis; Microstructure; Mechanical properties; GROWTH; FRACTURE; HARDNESS;
D O I：
10.1016/j.jallcom.2012.11.064
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Al2O3/ZrO2 eutectic ceramics were prepared by explosion synthesis using Al and Zr(NO3)(4) as raw materials. The Al2O3/ZrO2 eutectic microstructure showed that the rod-like ZrO2 phases with a diameter 200 nm were embedded orderly in Al2O3 matrix. With the increasing of the reaction temperature, the volume content of the Al2O3/ZrO2 eutectic increased accordingly, and the diameter and phase spacing of the rod-like ZrO2 decreased, which was mainly attributed to the sufficient diffusion at higher temperature and the large degree of supercooling. Due to the fine microstructure of the Al2O3/ZrO2 eutectic, the Vickers hardness and fracture toughness can reach 17.7 GPa and 10.3 MPa m(1/2), respectively. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：475 / 480
页数：6
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