Short carbon fiber reinforced polymers (CFRP) are successfully prepared by transfer moulding technology. For this purpose, compounds on the basis of novolac/urotropin with different 6 mm chopped carbon fibers and silicon powder contents are produced utilizing a laboratory tempered sigma‐blade kneader. These compounds are then shaped into 46 × 8 × 3 mm³ CFRP specimens using a transfer moulding machine. Depending on the material composition, the conversion to C/C‐SiC composites is performed through liquid silicon infiltration (LSI) process or inner siliconization. First, the short fiber content is varied between 30 and 50 wt% and its influence on the process and properties of the composites is studied. Second, an investigation of the inner siliconization through the co‐mixing of silicon powder (1‐23 wt% in CFRPs) during the compound production as well as a comparison with the external silicon infiltration process are presented and discussed. According to the results, the best mechanical properties are achieved at a fiber content of 40 wt% in the case of the external silicon infiltration and at silicon content below 14 wt% for composites produced by the inner siliconization process.

中文翻译：

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通过传递模塑和内部硅化生产的C / C-SiC复合材料的性能

短碳纤维增强聚合物（CFRP）通过传递模塑技术成功制备。为此，使用实验室回火的sigma-blade捏合机生产基于酚醛清漆/尿钙蛋白的化合物（具有不同的6毫米短切碳纤维和硅粉含量）。然后将这些化合物成型为46×8×3 mm ³CFRP样品使用传递模塑机。根据材料成分的不同，可以通过液态硅渗透（LSI）工艺或内部硅化工艺完成向C / C-SiC复合材料的转化。首先，短纤维含量在30至50 wt％之间变化，并研究了其对复合材料的工艺和性能的影响。其次，介绍并讨论了在化合物生产过程中通过共混硅粉（在CFRP中为1-23 wt％）进行内部硅化的研究，并与外部硅渗透过程进行了比较。根据结果​​，对于通过内部硅化工艺生产的复合材料，在外部硅渗透的情况下，纤维含量为40 wt％，在硅含量低于14 wt％时，可获得最佳的机械性能。