Abstract: The auperplasticity of SiCp/LY12 composites fabricated by PM method has been researched in the paper. The strain rate sensiticity index of SiCp/LY12 Compos lies extruded was measured in elongation state or compression state. Based on analyzing influence of technologic parameters on the superplasticily, the parameters of superplastic forming were elected. The preliminary study of the microsiructure and superplastioity of the composites has been conducted.

Key words: 超塑成形, 复合材料