A strategy to fabricate strength-ductility enhanced braze filler reinforced by 3-dimensional graphene sponge for joining C/C composites

A strategy to fabricate strength-ductility enhanced braze filler reinforced by 3-dimensional graphene sponge for joining C/C composites
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一种制造由 3 维石墨烯海绵增强的强度-延展性增强钎焊填料的策略,用于连接 C/C 复合材料

DOI:
10.1016/j.matdes.2020.108515
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发表时间:
2020-04
期刊:
影响因子:
8.4
通讯作者:
Song Yanan
Song Yanan
中科院分区:
材料科学1区
文献类型:
--
作者:
Sun Zhan;Zhang Lixia;Zhang Bo;Chang Qing;Song Yanan

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为了解决钎焊缝中的脆性化合物形成问题,选择创新的三维(3D)石墨烯海绵(GS)与单个AgCuTi钎焊料整合,形成复合钎焊填料以实现Ag单键Cu共晶占主导的钎焊缝,几乎没有脆性化合物。比较了3D GS增强钎料钎焊和未钎焊的C/C-C/C(C/C:碳纤维增强碳复合材料)接头的界面微观结构。特别是,钎料/GS界面进行了深入的讨论,使用透射电子显微镜(TEM)结合高分辨率透射电子显微镜(HRTEM)。结果表明,使用3D GS增强钎料后,接头的剪切强度提高了53%。对有和没有3D GS增强的钎料的机械性能进行了表征和讨论。结果表明,与原始钎料相比,3D GS增强钎料具有更强的机械强度和更大的延展性。
To address the brittle compounds formation issue in the brazed seam, an innovative 3-dimensional (3D) graphene sponge (GS) was selected to integrate with a single AgCuTi braze, forming a composite braze filler to achieve an Agsingle bondCu eutectic dominated brazed seam with almost no brittle compounds. Interfacial microstructure of the C/C-C/C (C/C: carbon fiber reinforced carbon composites) joints brazed with and without the 3D GS reinforced braze filler were put into comparison. In particular, the braze filler/GS interface was in-depth discussed using a transmission electron microscope (TEM) combined with a high resolution transmission electron microscopy (HRTEM). Results show that a 53% increase in shear strength happened for the joints after using a 3D GS reinforced braze filler. The mechanical performance of the braze filler with and without the 3D GS reinforcement was characterized and discussed. Results show that the 3D GS reinforced braze filler is both mechanically stronger and more ductile compared with the original braze filler.
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