Acta Metallurgica Sinica (English Letters) ›› 1991, Vol. 4 ›› Issue (9): 196-200.

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MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE The Author is now with Institute of Metal Research,Academia Sinica,China

MA Zongyi YAO Zhongkai Harbin Institute of Technology,Harbin,China   

  • 收稿日期:1991-09-11 修回日期:1991-09-11 出版日期:1991-09-11 发布日期:2009-10-10

MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE The Author is now with Institute of Metal Research,Academia Sinica,China

MA Zongyi YAO Zhongkai Harbin Institute of Technology,Harbin,China   

  • Received:1991-09-11 Revised:1991-09-11 Online:1991-09-11 Published:2009-10-10

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摘要： <正> The SiC_w/Al composite prepared by squeeze casting has a combination of superior roomtemperature specific strength and modulus together with excellent thermal properties.Theextrusion can make an improvement on the strength and ductility of the composite from 582MPa as squeeze casted up to 639 MPa,and on the transformation from isotropic to theanisotropic structure.This seems to be explained by the orientation of whiskers and thedensification of dislocations in matrix.TEM observation indicates that the stacking fault isthe usual planar defect on the SiC_w surface.

Abstract: The SiC_w/Al composite prepared by squeeze casting has a combination of superior room temperature specific strength and modulus together with excellent thermal properties.The extrusion can make an improvement on the strength and ductility of the composite from 582 MPa as squeeze casted up to 639 MPa,and on the transformation from isotropic to the anisotropic structure.This seems to be explained by the orientation of whiskers and the densification of dislocations in matrix.TEM observation indicates that the stacking fault is the usual planar defect on the SiC_w surface. composite;;SiC whisker;;Al alloy;;microstructure

Key words: composite, SiC whisker, Al alloy, microstructure