SiCN monofilament-reinforced Composite with novel multi-metal matrix on the basis of new cost-effective technologies for high-temperature applications - SiMet

更新提案的意图是基于新的可负担的高温应用技术（SiMet）的新型多金属基SiCN单丝增强复合材料，继续采用第一个提案的整体方法开发多金属基复合材料，并研究尚未解决的研究问题。这涉及到制备具有改善机械性能的厚SiCN纤维，这需要开发更柔韧的绿色纤维，缺陷更少，直径有规定，但也需要将热解温度提高到1400℃。根据审稿人的建议，纤维的涂层由分包公司TZO GmbH进行。最受欢迎的涂料以MMC（金属和c基涂料）应用而闻名。将对未涂覆和涂覆的纤维进行表征，以研究涂层对机械纤维性能的影响，并研究涂层与纤维以及与基体的相容性。为了提高复合材料的力学性能，基体合金必须适应整个体系的要求。这也需要对原始基体和涂层纤维之间的界面进行研究。将开发一种压力辅助渗透工艺，以减少孔隙含量。为了避免寄生脆性相，需要调整合金的一次基体和二次基体成分。将研究基于新型陶瓷纤维和开发的基体体系的复合材料的机械性能，并最终根据给定的要求进行评估。

The intention of the renewal proposal SiCN monofilament-reinforced composite material with new multi-metal matrix based on new affordable technologies for high temperature applications (SiMet) is to continue the holistic approach for the development of a multi-metal matrix composite of the first proposal and to investigate still unsolved research issues. This concerns the preparation of thick SiCN fibres with improved mechanical properties, which requires the development of more flexible green fibers with less defects and a defined diameter but also to increase the pyrolysis temperature up to 1400 °C. According to the reviewer recommendation coating of the fibers is performed by the sub-contracted company TZO GmbH. The favoured coatings are well known for MMC applications (metallic and C-based coatings). The uncoated as well as the coated fibers will be characterized to investigate the influence of the coating on mechanical fiber properties but also to investigate the compatibility between the coating and the fiber as well as with the matrix. The matrix alloys have to adapt to the requirements of the whole system to improve the mechanical properties of the composite. This requires also the investigation of the interface between the primary matrix and the coated fibers. A pressure assisted infiltration process will be developed for a reduction of the pore content. To avoid parasitic brittle phases it is required to adjust the alloy composition of primary and secondary matrix. The composite based on new ceramic fibers and the developed matrix system will be investigated regarding mechanical properties, and finally evaluated with respect to the given requirements.