The development research to toughness of SiC/SiC composites by the interface control.

这是对该纤维的强度进行了有效的说明，以提高SiC/SiC复合物的强度特性。因此，光纤和矩阵之间的接口是用碳和BN包裹的，以及研究如何控制接口组合的。SiC fiber used the Hi-Nicalon fiber of the filament。CVI方法是在材料制造中使用的。SiC/SiC composite material was produced using C-D22-D25-D2Cl-D23-D2Si in the raw material gas at about 1000-。虽然在初始阶段生产的材料是40毫米直径的形状，但这是可能的，因为它在以后生产的120毫米直径和2毫米厚度的较大材料。在下面的研究中，结果得到了这个研究的结果。（1）生产的SiC/SiC复合材料的光纤体积部分为35%，体积密度约为2.4克/厘米，D13-D1，而统一厚度的材料被认为是好的。（2）这可能是因为碳涂层是在纤维表面上制造的，从10微米到1000微米不等。（3）在高分辨率电子显微镜观测和EPMA分析中分析了纤维和碳涂层之间的接口。就像结果一样，它证明了裂缝进度的界面。（4）1.0微米涂层的最高价值是碳涂层的最高厚度时间被获得了材料弯曲强度。这是有可能的，这是从表面上滑动的强度和强度之间的关系中得出的。（5）碳涂层的形成对于SiC/SiC复合物的增强是必要的。而且，它证明了其导电性也增加了;从更高的事实来看，SiC/SiC复合材料的发展是可能的。在未来，更进一步的可开发性被设计为SiC/SiC复合体，作为一种高温高强度材料。

It was examined that the strength of the fiber was effectively manifested in order to improve the strength characteristic of SiC/SiC composite. Therefore, the interface between fiber and matrix was coated with carbon and BN, and the research which controlled the interface combination was carried out. The SiC fiber used the Hi- Nicalon fiber of the filament. The CVI method was used in the material manufacture. The SiC/SiC composite material was produced using CィイD22ィエD2HィイD25ィエD2ClィイD23ィエD2Si in the raw material gas at about 1000℃. Though the material produced at the initial stage was a shape of the 40mm diameter, it was possible that it was the 120mm diameter afterwards and produces the large material of the 2mm thickness.The result got in this study in the following is shown.(1)Fiber volume fraction of produced SiC/SiC composite material was 35%, and the volume density was about 2.4g/cmィイD13ィエD1, and the material of which the uniform thickness was good was got.(2)It became possible that the carbon coat was made from number 10μm to number 1000μm in the fiber surface.(3)The interface between fiber and carbon coat was analyzed in high resolution electron microscope observation and EPMA analysis. As the result, it was proven that the crack progressed the interface.(4)The value which was the highest in the carbon 1.0μm coating thickness time was obtained the material bending strength which coated the carbon. It was possible to understand this from the relationship between interfacial shear sliding strength and strength of the matrix.(5)Formation of the carbon coat is necessary for the strengthening of the SiC/SiC composite. And, it was proven that the ductility also increased.From the above fact, the development of the SiC/SiC composite was possible. In the future, further developability is desired the SiC/SiC composite as a high temperature high-intense material.