MICROSTRUCTURE OF NB2AL-NBAL3 EUTECTIC ALLOYS PRODUCED BY UNIDIRECTIONAL SOLIDIFICATION

被引：5

作者：

KUMAGAI, T

HANADA, S

机构：

[1] Institute for Materials Research, Tohoku University, Sendai

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1992年 / 152卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(92)90089-J

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and deformation behavior of unidirectionally solidified Nb2Al-NbAl3 eutectic alloys were investigated. At a solidification velocity of 1 mm h-1, long NbAl3 fibers parallel to the solidification direction grew in the Nb2Al matrix. Transmission electron microscopy showed that the growth directions of the eutectic intermetallics were [001] for both Nb2Al and NbAl3. Although no apparent preferred interface plane was observed, two types of orientation relationships between Nb2Al and NbAl3 were found: {110} NbAl3 parallel-to {100} Nb2Al or {100} NbAl3 parallel-to {100} Nb2Al. This composite exhibits high compression strength at high temperatures.

引用

页码：349 / 355

页数：7

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