Slip and twinning in polycrystalline alumina (α-Al2O3) deformed under hydrostatic pressure between 600° and 1000°C

被引：15

作者：

Korinek, SL ^{[1
]}

Castaing, J

机构：

[1] Ctr Etud Chim Met, UPR 2048, F-94407 Vitry Sur Seine, France

[2] Ctr Rech & Restaurat Musees France, C2RMF, LRMF CNRS UMR 171, F-75041 Paris 01, France

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2003年 / 86卷 / 04期

关键词：

D O I：

10.1111/j.1151-2916.2003.tb03342.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：

The microstructure of polycrystalline alumina deformed under hydrostatic pressure and at low temperature is investigated by transmission electron microscopy. Deformation occurs mainly by prism plane slip and rhombohedral twinning. Introduction of hydrogen leads to a significant decrease in the yield stress. In large grain size alumina deformed with hydrogen, accommodation of twinning involves dislocation reactions in the twin boundary and in the grains rather than by cracking. Prism plane dislocations decompose into basal dislocations by cross slip probably due to a decrease of Peierls stress for basal slip in the presence of hydrogen.

引用

页码：566 / 573

页数：8