纤维方向对单向C/SiC复合材料磨削加工性能的影响

为了研究碳纤维编织复合材料的去除机理，探明纤维编织方向对磨削加工性能的影响，设计并制备了单向复合材料C/SiC，并沿纤维典型方向进行了磨削实验。结果表明，单向复合材料磨削时，切向磨削力和法向磨削力均呈如下规律：法向磨削＞纵向磨削＞横向磨削；磨削加工过程中表面粗糙度值呈如下规律：纵向磨削＞法向磨削＞横向磨削。对加工表面显微形貌的分析，揭示了陶瓷基复合材料微观多向去除机理。

Effects of Fiber Direction on Grinding Performances for Unidirectional C/SiC Composites

In order to study the material removal mechanism of carbon fiber braided composites and to explore the influences of fiber weaving direction on the grinding performances, a unidirectional composite C/SiC was designed and prepared, and the grinding experiments were carried out along the typical direction of the fiber. The results indicate that the tangential grinding force ,normal grinding force and surface roughness show following rules when grinding the unidirectional composite materials: the tangential grinding force and the normal grinding force conform to the normal grinding>longitudinal grinding>transverse grinding, and the surface roughness of the machining conforms to the regular longitudinal grinding>normal grinding >transverse grinding. The micro-multi-directional material removal mechanism of ceramic matrix composites was revealed by analyzing the microstructures of the machined surfaces.