Research Initiation: Influence of Carbon Fibers Surface Modifications on Mechanical Properties of C-C Composites

这项为期2年的界面和力学研究的目标 碳-碳复合材料的主要性能是：（1）找到有效的 表面处理和去处理，这将降低化学 提高机械结合力和界面系数 摩擦力;（2）确定表面之间的相关性 官能团和从纤维到纤维的负载转移机制 基体、界面结合强度和断裂韧性。 纤维 表面处理将包括氧、氩等离子体蚀刻， 硝酸处理 处理后的表面特性和 未处理的纤维将使用电子光谱法测定， 化学分析和傅里叶变换红外光谱。 的 C-C复合材料将使用处理和未处理的 织物. 所有的复合材料都将用电子 显微镜、破坏性和非破坏性机械测试。 的 所得的机械性能将与表面 织物的特性。 这项研究将回答基本的 与基质协同机制有关的问题， 化学键、机械键弱， 界面摩擦 此外，这项研究的结果将 有助于优化C-C的机械性能 复合材料，增加他们的机会，更广泛的技术 应用.

The objectives of this 2 year study of the interfacial and mechanical properties of Carbon-Carbon Composites are: (1) to find effective surface treatments and de-treatments which would lower the chemical bonding and increase mechanical bonding and interfacial coefficient of friction; and (2) to determine the correlation between surface functional groups and the mechanism of load transfer from fiber to matrix, interfacial bond strength and fracture toughness. The fiber surface treatments will include oxygen, argon plasma etching and nitric acid treatment. The surface characteristic of treated and untreated fibers will be determined using Electron Spectroscopy for Chemical Analysis and Fourier Transform Infrared Spectroscopy. The C-C composites will be produced using both treated and untreated fabrics. All the composites will be analyzed using electron microscopy, destructive and non-destructive mechanical testing. The resulting mechanical properties will be correlated with the surface properties of the fabrics. This study will answer the fundamental question related to synergetic mechanism of the matrix by employing weak chemical bond, mechanical bond and high coefficient of interfacial friction. In addition, the results of this research will assist in the optimization of mechanical properties of C-C composites, increasing their chances for wider technological applications.