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钛合金/碳纤维布复合材料的界面与力学性能的研究
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北京理工大学材料学院,北京理工大学材料学院,北京理工大学材料学院,北京机电研究所,北京理工大学材料学院

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T146.2

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国家自然科学基金项目(面上项目,重点项目,重大项目)


An investigation on interface optimization and mechanical properties of Cu-coated carbon fiber cloth/titanium alloy composite
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School of Materials Science and Engineering,Beijing Institute of Technology,School of Materials Science and Engineering,Beijing Institute of Technology,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing research institute of mechanical electrical technology,School of Materials Science and Engineering,Beijing Institute of Technology

Fund Project:

National Science Foundation of China

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    摘要:

    本文选用Ti-6Al-4V钛合金为基体,镀铜碳纤维布为增强相来制备钛合金/碳纤维布复合材料。通过放电等离子烧结法(SPS)对镀铜碳纤维布与钛合金薄片进行叠层烧结,制备钛合金/碳纤维布叠层复合材料,并对其界面形貌、微观组织与力学性能进行表征。结果表明:镀铜碳纤维均匀分布在钛合金/碳纤维布复合材料中,CuTi, Cu和少量的TiC沿着纤维和基体的界面分布。钛合金/碳纤维布复合材料具有比钛合金略高的塑性,同时屈服强度和抗压强度与钛合金相比有了明显的提高。碳纤维表面电镀铜对复合材料界面有着重要的影响:(1)显着降低钛合金/碳纤维布复合材料的烧结温度;(2)提高了碳纤维和钛基体之间的润湿性,改善了界面结合,从而提高了钛合金/碳纤维布复合材料的力学性能;(3)有效地抑制TiC脆性相的产生,与未镀铜的碳纤布增强钛复合复合材料相比,镀铜碳纤维布/钛合金复合材料具有更好的塑性。

    Abstract:

    Using Cu-coated carbon fiber cloth (CFC) as reinforcement and Ti-6Al-4V (TC4) as matrix, the Cu-coated CFC/TC4 composite is fabricated by spark plasma sintering. The interface morphology, phase microstructure, phase distribution and mechanical properties of CFC/TC4 are characterized. Results show that carbon fibers are uniformly distributed in Cu-coated CFC/TC4. CuTi, Cu and very little TiC are distributed along the interface between fibers and matrix. Possessing slightly better plasticity than TC4, the yield strength and compressive strength of Cu-coated CFC/TC4 are obviously enhanced. The electroplated Cu plays important roles: (1) markedly decreases the sintering temperature of Cu-coated CFC/TC4; (2) significantly improves the wettability and interfacial bonding between carbon fibers and TC4 matrix, giving explanation to the increase of mechanical properties of Cu-coated CFC/TC4; (3) effectively inhibits the excessive generation of brittle TiC compared with uncoated CFC/TC4 composite, explaining the maintaining of good plasticity of Cu-coated CFC/TC4.

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杨智明,吴腾腾,刘金旭,周林,李树奎.钛合金/碳纤维布复合材料的界面与力学性能的研究[J].稀有金属材料与工程,2017,46(4):869~875.[Yang Zhiming, Wu Tengteng, Liu Jinxu, Zhou Lin, Li Shukui. An investigation on interface optimization and mechanical properties of Cu-coated carbon fiber cloth/titanium alloy composite[J]. Rare Metal Materials and Engineering,2017,46(4):869~875.]
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历史
  • 收稿日期:2015-01-22
  • 最后修改日期:2015-03-03
  • 录用日期:2015-03-25
  • 在线发布日期: 2017-08-04
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