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《Materials Review》 2018-S1
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Microstructure and Electrical Conductivity of SiC_p/A356 Composites with High SiC Volume Fraction

LU Jianning;WANG Juan;ZHENG Kaihong;LONG Jun;Guangdong Institute of Materials and Processing;Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening;  
Aluminum matrix composites represent a potential application prospect in the field of electronic packaging.In order to obtain high volume fraction of aluminum matrix composites,high volume fraction SiC particle reinforced A356 matrix composites(SiC_p/A356)was prepared by pressure infiltration method.The phase,microstructure and conductivity of the composites were characterized by metallographic microscope,XRD,SEM and EDS.The results demonstrates that the SiC_p/A356 composites prepared by this method have compact structure,the SiC particles are uniformly distributed in the A356 matrix and the interface is better.Moreover,the interfacial reaction is well controlled.As a result,some harm phases especially Al4 C3 fragility phase are nearly absent from interfacial reaction products.A layer of SiO2 formed from SiC after particle surface oxidation treatment.The SiO2 thin films were formed on the surface of the particles,which could inhibit the interfacial reaction.However,the shrinkage of the composites reduced,the resistivity of the composites increased,and the conductivity of the composite materials became worse.
【Fund】: 广东省增材制造(3D打印)技术项目(2015B010122003);; 广东省产学研合作项目(2014B090904070);; 广东省应用型科技研发专项资金项目(2015B090920004);; 广东省社会发展领域项目(2014B020216008);; 广东省属科研机构改革创新项目(2016B070701024);; 广州市产学研协同创新重大专项(201604016060)
【CateGory Index】: TB333
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