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A novel method based on selective laser sintering for preparing high-performance carbon fibres/polyamide12/epoxy ternary composites

机译：一种基于选择性激光烧结的新型高性能碳纤维/聚酰胺12 /环氧三元复合材料的制备方法

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摘要

A novel method based on selective laser sintering (SLS) process is proposed for the first time to prepare complex and high-performance carbon fibres/polyamide12/epoxy (CF/PA12/EP) ternary composites. The procedures are briefly described as follows: prepare polyamide12 (PA12) coated carbon fibre (CF) composite powder; build porous green parts by SLS; infiltrate the green parts with high-performance thermosetting epoxy (EP) resin; and finally cure the resin at high temperature. The obtained composites are a ternary composite system consisting of the matrix of novolac EP resin, the reinforcement of CFs and the transition thin layer of PA12 with a thickness of 595 nm. The SEM images and micro-CT analysis prove that the ternary system is a three-dimensional co-continuous structure and the reinforcement of CFs are well dispersed in the matrix of EP with the volume fraction of 31%. Mechanical tests show that the composites fabricated by this method yield an ultimate tensile strength of 101.03 MPa and a flexural strength of 153.43 MPa, which are higher than those of most of the previously reported SLS materials. Therefore, the process proposed in this paper shows great potential for manufacturing complex, lightweight and high-performance CF reinforced composite components in aerospace, automotive industries and other areas.
机译：首次提出了一种基于选择性激光烧结（SLS）工艺的新方法，以制备复杂高性能的碳纤维/聚酰胺12 /环氧树脂（CF / PA12 / EP）三元复合材料。程序简述如下：制备聚酰胺12（PA12）包覆的碳纤维（CF）复合粉末；通过SLS建立多孔的绿色零件;用高性能热固性环氧（EP）树脂渗透绿色零件；最后在高温下固化树脂。所得复合材料为三元复合体系，由线型酚醛清漆树脂基体，CFs增强材料和PA12过渡过渡层组成，厚度为595 thinnm。 SEM和显微CT分析表明，三元体系是三维共连续结构，CFs的增强剂很好地分散在EP基体中，体积分数为31％。力学测试表明，用这种方法制造的复合材料的极限抗拉强度为101.03 MPa，弯曲强度为153.43 MPa，高于大多数先前报道的SLS材料。因此，本文提出的方法显示出在航空航天，汽车工业和其他领域中制造复杂，轻巧和高性能CF增强复合材料组件的巨大潜力。

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