The kinetics and mechanisms of interface reactions in a unidirectional continuous SiC fiber-reinforced Ti-17 matrix composite were investigated using transmission electron microscopy and scanning electron microscopy. It was found that a reaction zone (RZ) consisting of two-layered TiC-type carbide forms at the fiber/matrix interface during fabrication of the composite. After isothermal exposure at elevated temperatures, the two-layered TiC-type carbide is inherited, and a new TiC-type carbide layer forms within the RZ after exposure at temperatures lower than 900°C, while a new Ti3C2-type carbide layer forms after exposure at 900°C. It was also observed that the growth of RZ is a diffusion-controlled and temperature-dependent process, obeying the Fick's law-based parabolic relationship and the Arrhenius equation. Two material constants, the temperature-independent rate constant k0 and activation energy Q, are determined as 31.5 × 10-4µm/s1/2 and 49.9 kJ/mol, respectively.

中文翻译：

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等温暴露的SiC纤维增强Ti-17基复合材料的界面微观结构演变。

利用透射电子显微镜和扫描电子显微镜研究了单向连续SiC纤维增强Ti-17基复合材料中界面反应的动力学和机理。已发现，在复合材料的制造过程中，由两层TiC型碳化物组成的反应区（RZ）在纤维/基质界面处形成。在高温下等温暴露后，继承了两层TiC型碳化物，在低于900°C的温度下暴露后在RZ内形成了一个新的TiC型碳化物层，而在之后的温度下又形成了一个新的Ti3C2型碳化物层。暴露于900°C。还观察到，遵循菲克定律基于抛物线关系和阿伦尼乌斯方程，RZ的生长是一个受扩散控制且依赖温度的过程。两个物质常数，