MICROSTRUCTURE OF ALPHA-AL BASE MATRIX AND SIC PARTICULATE COMPOSITES

被引：19

作者：

RADMILOVIC, V

THOMAS, G

DAS, SK

机构：

[1] UNIV CALIF BERKELEY, NATL CTR ELECTRON MICROSCOPY, BERKELEY, CA 94720 USA

[2] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

[3] ALLIED SIGNAL INC, MET & CERAM LAB, MORRISTOWN, NJ 07962 USA

[4] UNIV BELGRADE, DEPT MET, YU-11001 BELGRADE, YUGOSLAVIA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 132卷

关键词：

D O I：

10.1016/0921-5093(91)90373-U

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructures of a high temperature monolithic Al-Fe-V-Si alloy and a metal matrix and SiC particulate composite (MMC) based on this alloy matrix were characterized by conventional and high resolution transmission electron microscopy, microdiffraction and X-ray spectroscopy techniques. Silicide particles of average composition Al13(Fe,V)3Si were present in both of these materials. These particles were unstable under the electron beam at voltages above 200 kV, and exhibited radiation-induced disordering. SiC particulates present in the MMC structure were predominantly of the hexagonal 6H polytype, but the rhombohedral 87R-VII polytype was also observed. A very thin reaction layer was present between the matrix and SiC particles. No segregation of alloying elements such as iron, vanadium, or silicon at the matrix-SiC interface was observed. The second phase present at the alpha-Al-SiC interface was probably a disordered silicide.

引用

页码：171 / 179

页数：9