In-situ Al/24Si Functional Graded Materials Prepared by Electromagnetic Separation
In—situ Al／24Si Functional Graded Materials Prepared by Electromagnetic Separation

Cylinder-like in-situ Al/24Si FGMs were produced by using electromagnetic separating process. Si primary phasereinforced layer with volume fraction as high as 16 pct was formed at the outer region of the cylinder-like sampleswhere the local hardness and wear resistance were enhanced remarkably. Moreover, both of strength and ductility inthe inner region provided insurance of reliable strength for this as-cast gradient material. It indicated that generalmechanical properties such as good wear resistance at the outer region and good ductility in the central part couldbe obtained with the optimized redistribution of the Si primary particles under the electromagnetic force.