Li Ke, Kashkarov Egor, Syrtanov Maxim, Sedanova Elizaveta, Ivashutenko Alexander, Lider Andrey, Fan Ping, Yuan Daqing, Travitzky Nahum
School of Nuclear Science and Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia.
China Institute of Atomic Energy, Beijing 102413, China.
Materials (Basel). 2020 Jan 29;13(3):607. doi: 10.3390/ma13030607.
Ceramic matrix composites (CMCs) based on silicon carbide (SiC) are promising materials for applications as structural components used under high irradiation flux and high temperature conditions. The addition of SiC fibers (SiC) may improve both the physical and mechanical properties of CMCs and lead to an increase in their tolerance to failure. This work describes the fabrication and characterization of novel preceramic paper-derived SiC/SiC composites fabricated by spark plasma sintering (SPS). The sintering temperature and pressure were 2100 °C and 20-60 MPa, respectively. The content of fibers in the composites was approx. 10 wt.%. The matrix densification and fiber distribution were examined by X-ray computed tomography and scanning electron microscopy. Short processing time avoided the destruction of SiC fibers during SPS. The flexural strength of the fabricated SiC/SiC composites at room temperature varies between 300 and 430 MPa depending on the processing parameters and microstructure of the fabricated composites. A quasi-ductile fracture behavior of the fabricated composites was observed.
基于碳化硅（SiC）的陶瓷基复合材料（CMC）是有望用作在高辐照通量和高温条件下使用的结构部件的材料。添加碳化硅纤维（SiC）可改善CMC的物理和机械性能，并提高其对失效的耐受性。本文描述了通过放电等离子烧结（SPS）制备的新型陶瓷先驱体纸衍生SiC/SiC复合材料的制造和表征。烧结温度和压力分别为2100℃和20 - 60MPa。复合材料中纤维的含量约为10 wt.%。通过X射线计算机断层扫描和扫描电子显微镜检查了基体致密化和纤维分布情况。短加工时间避免了在SPS过程中SiC纤维的破坏。根据制备复合材料的工艺参数和微观结构，所制备的SiC/SiC复合材料在室温下的弯曲强度在300至430MPa之间变化。观察到所制备复合材料的准延性断裂行为。
