High temperature deformation of non-directionally solidified Al2O3/YAG/ZrO2 eutectic bulk ceramic

被引：6
作者：
Fu, Xue-song [1 ]
Fu, Lian-sheng [1 ]
Chen, Guo-qing [1 ]
Han, Wen-Bo [2 ]
Zhou, Wen-long [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116023, Peoples R China
[2] Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Microstructure-final; Mechanical properties; Al2O3; Structural applications; MECHANICAL-PROPERTIES; HIGH-STRENGTH; MICROSTRUCTURE; COMPOSITES; GROWTH; FRACTURE;
D O I：
10.1016/j.ceramint.2016.10.130
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Excellent high temperature mechanical properties of melt-grown Al2O3-based eutectics have previously been demonstrated in samples prepared by directional solidification methods. In this study, the deformation behaviour of melt-grown Al2O3/YAG/ZrO2 eutectic bulk prepared by a non-directional solidification method was investigated by means of compressive tests in a temperature range of 1200-1700 degrees C. The non-directionally solidified eutectic bulk ceramic has a colony structure and is polycrystalline. It begins to show ductility and has a compressive strength of 320 MPa at 1500 degrees C, which is much higher than that of the sintered ceramic with the same composition. However, its plastic deformability is insufficient, even at 1700 degrees C (just below the melting point of 1715 degrees C), and cracking occurs during compressive deformation.
引用
收藏
页码：1781 / 1787
页数：7
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