Assessment of preform manufacturing processes with ceramic fibers

陶瓷基复合材料（CMC）是一种在陶瓷基体外包裹陶瓷纤维增强层的复合材料。这种组合产生了一种轻质材料，可以承受高达1100°C的长时间暴露温度，因此超过了高温合金的性能。随着耐温性的提高，发电厂和飞机发动机中的涡轮机可以在更高的温度下运行，这将提高燃油效率并降低排放。虽然，陶瓷纤维在复合材料中的使用不是很广泛，因此很少有关于这种材料的预制体制造的易用性的信息。本项目旨在评估陶瓷纤维纱线在传统制造设备上的可制造性，以生产CMC零件的预制体。这项工作应该确定在不同的生产设备上生产2D， 2.5D和3D预制体时加工陶瓷纤维的不同挑战。将研究近净形预制体制造技术，以尽量减少纤维损耗和后期加工操作。这些信息将用于指导设计和制造具有改进重量和工作温度的新部件。

Ceramic matrix composite (CMC) are produced with a ceramic fibers reinforcement surrounded by a ceramic matrix. This combination produces a lightweight material that can withstand prolonged exposure to temperature up to 1100°C and therefore surpass the performances of superalloys. With this increase in temperature resistance, turbines in power plants and aircraft engines could operate at higher temperature which would improve fuel efficiency and lower emissions. Although, ceramic fibers usage in composite materials is not very widespread and therefore few information is available on the ease of preform manufacturing of this type of material. This project aims to assess the manufacturability of ceramic fibers yarns on conventional manufacturing equipment to produce preforms for CMC parts. This work should identify the different challenges of processing ceramic fibers in the production of 2D, 2.5D and 3D preforms on different production equipment. Near net-shape preform manufacturing technics will be investigated in order to minimize fiber loss and post-fabrication manipulations. This information will be use to guide the design and the manufacturing of new parts with improved weight and operating temperature.