Influence of grinding fiber angles on grinding of the 2D-Cf /C-SiC composites
Influence of grinding fiber angles on grinding of the 2D-Cf /C-SiC composites
复制标题
磨削纤维角度对2D-Cf/C-SiC复合材料磨削的影响
DOI：
10.1016/j.ceramint.2018.04.083
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发表时间：
2018-08-01
影响因子：
5.2
通讯作者：
Cui, Changcai
中科院分区：
文献类型：
--
作者：
Liu, Qiong;Huang, Guoqin;Cui, Changcai
研究了2D-C-f/C-SiC复合材料0 °/90 °正交结构表面在不同磨削纤维角度（磨削方向与纤维取向的夹角，GFA）下的磨削特性及机理。进行了一系列的平面磨削实验。研究了磨削纤维角度对磨削力、表面形貌和粗糙度的影响。结果表明，不同磨削纤维角度下的磨削力和表面粗糙度均为45 °> 30 °> 0 °。总建筑面积对地表微结构也有重要影响。纤维束通过剥离和撕裂的组合而损坏，这取决于GFA。通过单磨粒划痕试验分析了2D-C-f/C-SiC复合材料的磨削机理。划痕力和表面形貌的结果大大支持磨削过程中获得的差异。材料去除机制以脆性去除为主，是纤维层脆性断裂和SiC基体开裂的结合。研究结果为提高编织纤维增强陶瓷基复合材料的加工质量提供了新的指导。
This paper aimed to investigate the grinding characterizations and mechanism of the 0 degrees/90 degrees orthogonal structure surface of the 2D-C-f/C-SiC composites under different grinding fiber angles (the angle between the grinding direction and the fiber orientation, GFA). A series of surface grinding experiments were carried out. The influence of grinding fiber angles on the grinding forces, surface morphologies and roughness were investigated. The results show that the grinding forces and surface roughness under different grinding fiber angles both follow the order 45 degrees > 30 degrees > 0 degrees. The GFA also plays a significant influence on the micro structure of ground surface. Fiber bundles are damaged by the combination of peel off and tore off which depends on the GFA. The grinding mechanism of the 2D-C-f/C-SiC composites was also analyzed with the help of a single grit scratching test. The results of scratching force and surface morphologies greatly support the differences obtained during grinding. The material removal mechanism is dominant in brittle removal mode which is the combination of the fiber-layered brittle fracture and the SiC matrix cracking. These results would provide new guidance for improving the machining quality of woven fiber reinforced ceramic matrix composites.