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EVALUATION OF DIFFERENT CARBON PRECURSORS FOR THE LIQUID SILICON INFILTRATION PROCESS

机译：液态硅渗透过程中不同碳前驱物的评估

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摘要

The liquid silicon infiltration process (LSI) is a cost efficient manufacturing route to produce fiber reinforced ceramics. The manufacturing route can be split into three steps. In the first step, a carbon fiber reinforced plastic composite (CFRP) is fabricated from a polymer with high carbon yield (carbon precursor). The CFRP is pyrolyzed in the second step to achieve a porous carbon fiber reinforced carbon (C/C). In the third step, liquid silicon is infiltrated to form a dense C/C-SiC composite. The used carbon precursors play a key role in the development of composites with tailored functional properties. The aim of this work is to evaluate several carbon precursors for the liquid silicon infiltration process. One phenolic resin and two cyanate ester resins are investigated. The microstructure of the composites is characterized after each processing step. The mechanical properties of the C/C-SiC composites are determined by three-point bending test. Differences in crack pattern and pore formation during pyrolysis and in silicon infiltration behavior are described. The suitability of the precursors for the manufacturing route is discussed.
机译：液态硅渗透工艺（LSI）是生产纤维增强陶瓷的经济高效的生产途径。制造路线可以分为三个步骤。第一步，由碳收率高的聚合物（碳前驱体）制成碳纤维增强塑料复合材料（CFRP）。在第二步中将CFRP热解，以获得多孔碳纤维增强碳（C / C）。在第三步骤中，渗透液体硅以形成致密的C / C-SiC复合材料。用过的碳前体在开发具有定制功能特性的复合材料中起着关键作用。这项工作的目的是评估液态硅渗透过程中的几种碳前体。研究了一种酚醛树脂和两种氰酸酯树脂。在每个加工步骤之后，对复合材料的微观结构进行表征。 C / C-SiC复合材料的力学性能通过三点弯曲试验确定。描述了热解过程中裂纹模式和孔形成以及硅渗透行为的差异。讨论了前体在生产过程中的适用性。

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  • 会议地点 XIan(CN)
  • 作者

    Kristina Roder; Andreas Todt; Daisy Nestler; Bernhard Wielage;

  • 作者单位

    Institute of Materials Science and Engineering, Chemnitz University of Technology Chemnitz, Germany;

    Institute of Materials Science and Engineering, Chemnitz University of Technology Chemnitz, Germany;

    Institute of Materials Science and Engineering, Chemnitz University of Technology Chemnitz, Germany;

    Institute of Materials Science and Engineering, Chemnitz University of Technology Chemnitz, Germany;

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