SiC颗粒混杂对M40/ZM6复合材料组织及性能的影响  

Effect of SiC Particle on Microstructure and Properties of M40/ZM6 Composites

作　　者：宋美慧[1] 武高辉[2] 修子扬[2] 陈国钦[2] 

机构地区：[1]黑龙江省科学院高技术研究院,黑龙江哈尔滨150020 [2]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《稀有金属材料与工程》2014年第9期2187-2191,共5页Rare Metal Materials and Engineering

基　　金：国家科技重大专项资助项目(2009ZX04004-062)

摘　　要：采用压力浸渗法制备单向M40＋SiCp/ZM6复合材料。利用扫描电镜、透射电镜、拉伸试验机和热膨胀仪等分析测试手段研究了SiC颗粒混杂对复合材料微观组织、力学性能及热膨胀系数的影响。结果表明,SiC与ZM6发生界面反应,生成羽毛状的NdSi2界面反应物,提高界面润湿性。SiC颗粒混杂可以提高复合材料力学性能,使复合材料纵向热膨胀系数升高,横向热膨胀系数降低。用文中提出的热膨胀系数计算方法,可以准确计算单向碳纤维与SiC颗粒混杂增强复合材料在20~150℃范围内的平均热膨胀系数。The unidirectional Cf/Mg composites were fabricated by a pressure infiltration method. The effect of hybrid SiC particle on microstructure, mechanical properties and thermal expansion coefficient （CTEs） of M40/ZM6 composites was investigated using scanning electron microscope （SEM）, transmission electron microscope （TEM）, electronic tensile testing machine and thermal expansion instrument. Results show that feathery NdSi2 phase at SiC-ZM6 interface is formed. After carbon fiber is hybrid reinforced with SiC particles, NdSi2 phase improves the wettability between reinforcements and magnesium alloys, which improves mechanical properties of composites and decreases their horizontal CTEs. CTEs of unidirectional carbon fiber is hybrid reinforced with SiC particle composites between 20℃ and 150℃ are in a good agreement with the model derived by the author.

关 键 词：Cf/Mg复合材料 SIC颗粒 界面 热膨胀 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]