Fabrication of ceramics fiber reinforced model composites suitable for neutron irradiation study and their interfacial strength properties

在目前的研究中，(1)制备了更小、截面几乎相同、成本相对较低的单向先进SiC/SiC模型复合材料（微型复合材料），用于近期SiC/SiC复合材料的中子辐照研究。(2)通过卸载-再加载循环拉伸试验、滞回线分析和单纤维推出试验，考察了纤维表面粗糙度和界面厚度对复合材料拉伸性能和界面性能的影响。(3)提出了一种利用TEM显微图像分析辐照前后热解碳间相显微结构变化的评价方法。

In the current research, (1) unidirectional advanced SiC/SiC model composites (minicomposites) were fabricated with smaller and nearly same cross-section and with relatively low cost, for neutron irradiation study on SiC/SiC composites in near-term future. (2) The effects of fiber surface roughness and interphase thickness of the minicomposites on tensile and interfacial properties were examined by unloading-reloading cyclic tensile tests, the hysteresis loop analysis, and single fiber push-out test. Additionally, (3) an evaluation method was suggested for microstructural change of pyrolytic carbon interphase before/after irradiation by an image analysis using TEM micrographs.