摘要
The interfacial microstructure of Al 2O 3 short fibre reinforced Al 5.5Zn matrix composite was studied using transmission electron microscope (TEM) in this paper.Experimental results show that there exist a diffusional layer with a wide thickness range and a third phase in the fibre/matrix interface,resulting from Al/SiO 2 reaction.Some of the reduced silicon atoms adhere to the fibre/matrix interface and nucleate to form the elemental eutectic silicon,and the others diffuse into the Al/Zn melt and form the diffusional layer.The complexity of the interfacial microstructure may result from the different solidification conditions between the regions in the melt because of the non uniformity of the fibre distribution and orientation in the preform.
The interfacial microstructure of Al 2O 3 short fibre reinforced Al 5.5Zn matrix composite was studied using transmission electron microscope (TEM) in this paper.Experimental results show that there exist a diffusional layer with a wide thickness range and a third phase in the fibre/matrix interface,resulting from Al/SiO 2 reaction.Some of the reduced silicon atoms adhere to the fibre/matrix interface and nucleate to form the elemental eutectic silicon,and the others diffuse into the Al/Zn melt and form the diffusional layer.The complexity of the interfacial microstructure may result from the different solidification conditions between the regions in the melt because of the non uniformity of the fibre distribution and orientation in the preform.
