SiC/Cu复合材料的性能

Properties of SiC/Cu Composite Materials

文摘采用磁控溅射技术制备了SiC/Cu复合材料和SiC、Cu膜。用SEM和XRD对材料的微观结构进行观察和分析,压痕测试和拉伸实验结果表明:SiC/Cu复合材料的层状结构清晰,其韧性和拉伸强度相对于SiC材料有很大提高,但显微硬度有所降低。断口分析表明:裂纹偏转、金属塑性变形、宏观桥联等是其拉伸强度提高的主要原因。

Monothetic SiC,Cu,and SiC/Cu laminated composites with different SiC layer thickness were synthesized by magnetron sputtering.The microstructure of the SiC/Cu laminated composites were characterized by SEM and XRD.Indentation test and tensile experiment were carried out on micro-hardmeter and electronic universal testing machine（INSTRON）,respectively.The experimental results show that clear interfaces are formed in SiC/Cu laminated composites.Compared with monothetic SiC,the toughness and tensile strength of SiC/Cu laminated composites can be improved,however,the hardness decreases.From the examination of fracture surface reveales that crack deflection,bridging,plastic deformation of Cu ductile metal layers are main reasons to improve the tensile strength of SiC/Cu laminated composites.