STRESS-STRAIN MODES OF RHOMBOHEDRAL TWINNING IN ALPHA-AL2O3 SINGLE-CRYSTALS

被引：2

作者：

CHOI, JK

AUH, KH

机构：

[1] Department of Inorganic Materials Engineering, Hanyang University, Seoul

来源：

MATERIALS LETTERS | 1995年 / 23卷 / 1-3期

关键词：

Alumina - Crystal growth - Dislocations (crystals) - Plastic deformation - Strain - Stresses - Thermal effects - Twinning;

D O I：

10.1016/0167-577X(95)00012-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The plastic deformation of alpha-Al2O3 due to rhombohedral twinning was investigated. Specimens were deformed in compression along the c axis with an Instron universal testing machine below 1100 degrees C in order to avoid basal twinning and dislocation slip. Six different types of stress-strain modes were obtained in rhombohedral twinning. Four of these showed that the stress drops accompanied twin formation. From the Instron stress-crosshead displacement charts, the relative twin growth rate (TGR) versus temperature was determined. As the temperature increased, the twin growth rate increased.

引用

页码：99 / 103

页数：5

共 13 条

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