Ceramic matrix composites exhibit excellent high temperature properties and are candidate materials for structural applications from jet engines to nuclear fuel cladding. The strength and deformation behavior of these composites are intrinsically tied to the properties of the fiber/matrix interface. This research introduces a novel technique to evaluate the fundamental friction and wear characteristics of these interfaces. A case study on SiC_f/PyC/SiC_m composites applies in situ fiber fretting to investigate the kinetic friction coefficient and cyclic wear characteristics of the interphase. The experimental methodology is presented in explicit detail to encourage other researchers to explore the capabilities of this technique. Testing was carried out as a function of fiber roughness, PyC thickness (≈10, 500, 1200 nm), cycle count (10, 100, 1000), and frequency (1, 5, and 10 Hz). The friction coefficient and wear behavior changed with cycle length due to a transition from adhesive to abrasive mechanisms. SEM fractography provided insights to tribological evolution from adhesive sliding to three-body abrasive wear. The structural disorder at the tribo-surface relating to graphitic content and dangling bond density was investigated using Raman spectroscopy. Properties are contextualized with comparison to uniaxial tensile behavior of the parent composite.

陶瓷基复合材料具有出色的高温性能，是从喷气发动机到核燃料包壳的结构应用的候选材料。这些复合材料的强度和变形行为本质上与纤维/基质界面的性质有关。这项研究引入了一种新技术来评估这些界面的基本摩擦和磨损特性。原位应用SiC _f / PyC / SiC _m复合材料的案例研究纤维微动研究相间动摩擦系数和循环磨损特性。实验方法以明确的细节呈现，以鼓励其他研究人员探索该技术的功能。根据纤维粗糙度，PyC厚度（≈10、500、1200 nm），循环计数（10、100、1000）和频率（1、5和10 Hz）进行测试。由于从粘合剂机理到磨料机理的转变，摩擦系数和磨损行为随循环长度而变化。扫描电镜（SEM）断层照相术提供了从胶粘剂滑动到三体磨料磨损的摩擦学演变的见解。使用拉曼光谱研究了摩擦表面上与石墨含量和悬空键密度有关的结构紊乱。