Influence of the fiber orientation on 3D C/C-SiC composite material and its formation mechanism of the machining surface
Influence of the fiber orientation on 3D C/C-SiC composite material and its formation mechanism of the machining surface
复制标题
纤维取向对3D C/C-SiC复合材料的影响及其加工表面形成机制
DOI：
10.1007/s00170-021-08149-1
复制
发表时间：
2022
影响因子：
3.4
通讯作者：
Yang Jun
中科院分区：
文献类型：
--
作者：
Li Wei;Long Gui;Shi Feng;Zhou Shenlei;Yin Jia;Yang Jun
碳/碳（C/C）-SiC复合材料因其优异的导热性、耐腐蚀性和耐磨性而备受关注。对3D C/C-SiC复合材料的磨削加工性能进行系统研究的学者很少。采用树脂结合剂金刚石砂轮对3D C/C-SiC复合材料进行了磨削试验。研究了加工条件对磨削力、微观形貌、表面质量和残余应力的影响，并针对3种典型的纤维取向深入分析了材料去除机理。结果表明，不同纤维区域的表面粗糙度大小顺序为：90°纤维> 0°纤维>普通纤维。纤维的取向对材料去除机制有显着影响。在磨削过程中，C/C-SiC复合材料的残余热应力从32.25 MPa增加到207.43 MPa。对磨削表面进行抛光不仅可以去除裂纹层和残余应力层，而且可以引入残余压应力层，有效地提高材料强度。3DC/C-SiC复合材料的材料去除过程不同于2DC/C-SiC复合材料和传统的脆性材料。C/C-SiC复合材料的主要断裂方式为脆性断裂。由于碳纤维、SiC基体和热解碳界面的力学性能不同，材料在磨削过程中的损伤是异步的。本工作为高质量加工3D C/C-SiC复合材料零件提供了全面的了解。
Carbon/Carbon (C/C)–SiC composite materials attained much attention due to its unique properties like immense thermal conductivity, high corrosion, and abrasive resistance. Few scholars have systematically studied the grinding machinability of 3D C/C–SiC composite material. In this paper, the grinding experiment of 3D C/C–SiC composite material was carried out with a resin-bonded diamond grinding wheel. The effect of machining conditions on the grinding force, micromorphology, surface quality, and residual stress was studied, and the material removal mechanism was analyzed in-depth aimed at the three typical fiber orientations. The result shows that the surface roughness of different fiber areas follows the order: 90° fiber > 0° fiber > Normal fiber. The fiber’s orientation showed a significant effect on the mechanism of material removal. The residual thermal stress of C/C–SiC composite material increases from 32.25 to 207.43 MPa during the grinding process. Polishing the ground surface not only can remove the crack layer and residual stress layer but also can introduce residual compressive stress layer, which can effectively enhance the material strength. The 3D C/C–SiC composite material removal process is distinct from the composite material 2D C/C–SiC and the traditional brittle material. The main removal of C/C–SiC composite material is recognized as brittle fracture mode. Because of the different mechanical properties of carbon fiber, SiC matrix, and the pyrocarbon interface, the damage of material during grinding is asynchronous. The present work provides a comprehensive understanding for processing 3D C/C–SiC composite material parts with high quality.