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首页> 外文会议>High temperature ceramic matrix composites 8 >C/C-SiC MATERIALS BASED ON MELT INFILTRATION - MANUFACTURING METHODS AND EXPERIENCES FROM SERIAL PRODUCTION
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C/C-SiC MATERIALS BASED ON MELT INFILTRATION - MANUFACTURING METHODS AND EXPERIENCES FROM SERIAL PRODUCTION

机译：基于熔体渗透的C / C-SiC材料的制造方法及批量生产的经验

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摘要

C/SiC and C/C-SiC materials based on Melt Infiltration (MI) are combining adequate performance with low manufacturing costs and have opened up new application areas beyond aerospace. MI processes generally are based on three main steps: (1) manufacture of a CFRP preform, (2) pyrolysis to porous C/C and (3) Si infiltration and SiC matrix build up. Various MI methods have been developed, which differ mainly in the way the Si is infiltrated and the C fibres are protected against reaction with Si. An overview of the different MI manufacturing methods and the characteristic properties of the resulting CMC materials is given with special attention to LSI (Liquid Silicon Infiltration), the most commonly used MI process. The second part is focused on the reliability of the LSI process, which was investigated in the frame of a pilot production of 120 friction pads for an aircraft propeller brake. Therefore several C/C-SiC plates were manufactured almost identical. After each process step, relevant material properties were determined and the plates were investigated by non-destructive evaluation. Mechanical properties of the C/C-SiC material were determined by coupon tests. In this exemplary pre-series, low waste rates and high reproducibility of the LSI process, inferred from low deviations of the material properties in each plate and from plate to plate, could be demonstrated.
机译：基于熔体渗入（MI）的C / SiC和C / C-SiC材料具有足够的性能和较低的制造成本，并开辟了航空航天以外的新应用领域。 MI工艺通常基于三个主要步骤：（1）制造CFRP预成型坯；（2）热解成多孔C / C；（3）形成Si渗透和SiC基体。已经开发了多种MI方法，其主要区别在于Si的渗透方式和保护C纤维不与Si反应的方式。概述了不同的MI制造方法和所得CMC材料的特性，并特别关注了最常用的MI工艺LSI（液态硅渗透）。第二部分着重于LSI工艺的可靠性，该工艺已在试制120个飞机螺旋桨制动器摩擦垫的框架中进行了研究。因此，制造了几张几乎相同的C / C-SiC板。在每个工艺步骤之后，确定相关的材料属性，并通过无损评估研究平板。 C / C-SiC材料的机械性能通过试样试验确定。在该示例性的预系列中，可以证明由于每个板以及板与板之间材料特性的低偏差而导致的LSI工艺的低浪费率和高可重复性。

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  • 会议地点 XIan(CN)
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    Bernhard Heidenreich; Severin Hoftnann; Markus Keck; Raouf Jemmali; Martin Friess; Dietmar Koch;

  • 作者单位

    DLR - German Aerospace Center Institute of Structures and Design Pfaffenwaldring 38-40 D-70569 Stuttgart;

    DLR - German Aerospace Center Institute of Structures and Design Pfaffenwaldring 38-40 D-70569 Stuttgart;

    DLR - German Aerospace Center Institute of Structures and Design Pfaffenwaldring 38-40 D-70569 Stuttgart;

    DLR - German Aerospace Center Institute of Structures and Design Pfaffenwaldring 38-40 D-70569 Stuttgart;

    DLR - German Aerospace Center Institute of Structures and Design Pfaffenwaldring 38-40 D-70569 Stuttgart;

    DLR - German Aerospace Center Institute of Structures and Design Pfaffenwaldring 38-40 D-70569 Stuttgart;

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