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
影响因子:
8.4
通讯作者:
Song Yanan
中科院分区:
文献类型:
--
作者:
Sun Zhan;Zhang Lixia;Zhang Bo;Chang Qing;Song Yanan
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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