C/C复合材料及高强石墨高温摩擦磨损性能对比研究

采用MG-2000型摩擦磨损试验机对比考察了C／C复合材料及航空发动机主轴密封环拟用材料高强石墨的高温摩擦磨损行为，采用显微激光拉曼光谱仪及扫描电子显微镜分析了C／C复合材料磨损表面组成及形貌．结果表明：具有粗糙层和光滑层复合结构的C／C复合材料的高温摩擦磨损性能明显优于高强石墨材料，适合用作航空发动机主轴密封环材料；C／C复合材料的高温摩擦磨损性能取决于磨粒磨损、粘着磨损及氧化磨损的共同作用．

Comparative Study on the Friction and Wear Behaviors of C/C Composites and High-Strength Graphite at Elevated Temperature

The friction and wear behaviors of two types of C/C composites with different structures sliding against W18Cr4V steel at elevated temperatures were investigated on an MG-2000 tester in a pin-on-disc configuration, using high-strength graphite which was supposed to be used to prepare the seal-ring of the main axis of an aviation engine as a control. The composition and morphology of the worn composite surface was analyzed by means of Raman spectroscopy and scanning electron microscopy. It was found that the C/C composite with a rough lamination and smooth lamination complex structure showed much better wear-resistance than the high-strength graphite at elevated temperature, thus it could be used as a promising candidate material to prepare the seal ring of the main axis of the aviation engine. The C/C composites were dominated by abrasive wear, adhesion wear, and oxidation wear, in the dry sliding against the steel at elevated temperatures.