(西北工業(yè)大學(xué) 機械工程系， 西安 710072)
摘 要: 探討了液-固擠壓SiCp/LY12復(fù)合材料的組織與性能特征及其相互之間的關(guān)系。研究表明，其基體組織晶粒細小，SiC顆粒基本呈均勻隨機分布，無明顯堆積及脫粘現(xiàn)象，且與基體結(jié)合良好；抗拉強度比基體材料提高20%～32％。從而為顆粒增強金屬基復(fù)合材料管、棒材的制備提供了一種減少工序、節(jié)能節(jié)材的可行方法。
關(guān)鍵字: 液-固擠壓； 顯微組織； SiCp/LY12復(fù)合材料
prepared by liquid-solid extrusion process
（Department of Mechanical Engineering,
Northwestern Polytechnical University,Xi′an 710072, P.R.China）
Abstract:The characteristics of microstructure and properties of SiCp/LY12 composite prepared by liquid-solid extrusion process and their mutual relation werediscussed. The results show that the grains of matrix are refined and SiC particles distribute evenly and randomly. There exists no collection of SiC particles. The bonding among the particles and matrix is strong. Compared with the matrix alloy, the tensile strength increases by 20%～32％. These results prove that the liquid-solid extrusion process is an effective method for manufacturing tube and bar products of metal matrix composites reinforced by particles
Key words: liquid-solid extrusion; microstructure; SiCp/LY12 composite
