Direct Writing 3D Printing of Carbon Fiber/Silicon Carbide Ceramics Performance Optimization
In the process of ceramic preparation,the sintering process plays a crucial role,which not only affects the microstructure of ceramics,but also determines the mechanical properties of ceramics.Therefore,in order to improve the properties of silicon carbide/carbon fiber ceramic samples,the sintering process was optimized.Using direct writing 3D printing,carbon fiber/silicon carbide was used as printing material,and the printed carbon fiber/silicon carbide ceramic samples were sintered by four different sintering processes through triaxial nozzle extrusion printing.The effects of different sintering processes on carbon fiber/silicon carbide ceramic samples,microstructure and properties were analyzed.The results show that the microstructure and properties of the sintered carbon fiber/SIC ceramic sample are the best,the density can reach 95.5%,and the bending strength can reach 156 MPa after sintering process 3,that is,the ratio of the impregnated polycarbosilane to xylene is 2∶3,and the sintering temperature is reached at the temperature of 10℃·min-1.
direct writing 3D printingcarbon fiber/silicon carbidesintering processbending strengthconsistency
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