Effects of zirconium doping on grain-boundary bonding in alumina-silicon carbide composites

被引：4

作者：

Deng, ZY ^{[1
]}

Xu, FF

She, JH

Tanaka, Y

Bando, Y

机构：

[1] Natl Inst Mat Sci, Met Matrix Composite Res Grp, Tsukuba, Ibaraki 3050047, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[3] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2004年 / 87卷 / 03期

关键词：

D O I：

10.1111/j.1551-2916.2004.00493.x

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：

In this work, 800 ppm of Zr4+ dopants were added to Al2O3-5 vol% SiC particle composite. Zr4+ doping led to a weak Al2O3 grain-boundary bonding so that the fracture mode changed from transgranular in undoped composite to intergranular in Zr4+-doped composite. The fracture mode change increased the fracture toughness of the composite. Transmission electron microscopy and energy-dispersive spectroscopy examinations revealed that the weak grain-boundary bonding in the doped composite was caused by the segregation of Zr4+ and Si4+ ions at the Al2O3 grain boundary.

引用

页码：493 / 495

页数：3

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