Microstructures and mechanical properties of Cu/Ti_3SiC_3/C/MWCNTs composites prepared by vacuum hot-pressing sintering

摘要

Cu/Ti_3SiC_2/C/MWCNTs composites were prepared by vacuum hot-pressing sintering. Microstructures and mechanical properties of Cu/Ti_3SiC_2/C/MWCNTs composites with different multi-walled carbon nanotubes contents have been systematically investigated. The microstructures of the composites were examined by optical microscopy, X-ray diffraction, back scattered electron imaging, scanning electron microscope and energy dispersive spectrometer. The mechanical properties were determined from Brinell hardness and tensile tests. The results demonstrated that there was an optimum value of MWCNTs content which has an impact on microstructures and mechanical properties of Cu/Ti_3SiC_2/ C/MWCNTs composites. Based on MWCNTs content on properties and microstructure of Cu/Ti_3SiC_2/ C/MWCNTs composites, effects of MWCNTs on improvement of the composites and strengthening mechanism have been analyzed.