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Comprehensive enhancement of the mechanical and thermo-mechanical properties of W/Cu joints via femtosecond laser fabricated microano interface structures

机译:通过飞秒激光制造的微/纳米界面结构全面增强W / Cu接头的机械和热机械性能

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摘要

W/Cu joining is key for the fabrication of plasma facing components of fusion reactors, which however is very challenging due to the low bonding strength and high W/Cu interface thermal stress as a result of the immiscible nature of W-Cu binary system and thermal expansion coefficient mismatch between W and Cu. In this paper, we proposed a method for comprehensive enhancement of the mechanical and thermo-mechanical properties of W/ Cu joints based on femtosecond (fs) laser fabricated microano interface structures. Four kinds of surface structures, namely pristine structure, nano ripples, micro-cubes and micro-pits were fabricated on W by fs laser ablation and introduced into W/Cu joining interface by hot pressing joining at 1000 ℃, 80 MPa. The microano interface structures contribute to significant enhancement of the tensile strength, shearing strength and thermal fatigue life of the W/Cu joints, which reach 101.58 MPa, 186.47 MPa and > 800 thermal cycles, increased by about 150%, 320% and 400% compared with W/Cu joints with pristine interface structure. This research provides an approach for enhanced joining between dissimilar materials, including but not limited to W and Cu.
机译:W / Cu连接是制造聚变反应堆面向等离子体部件的关键,但是由于W-Cu二元体系和C-Cu二元体系的不混溶性而导致的低键合强度和高W / Cu界面热应力,这非常具有挑战性。 W和Cu之间的热膨胀系数不匹配。在本文中,我们提出了一种基于飞秒(fs)激光制造的微/纳米界面结构,全面增强W / Cu接头的机械和热机械性能的方法。通过fs激光烧蚀在W上制备了原始结构,纳米波纹,微立方体和微坑四种表面结构,并通过在1000℃,80 MPa下的热压连接引入W / Cu连接界面。微/纳米界面结构显着提高了W / Cu接头的拉伸强度,剪切强度和热疲劳寿命,达到101.58 MPa,186.47 MPa和> 800个热循环,分别增加了约150%,320%和与具有原始界面结构的W / Cu接头相比为400%。这项研究提供了一种增强异种材料之间结合的方法,包括但不限于钨和铜。

著录项

  • 来源
    《Materials Science and Engineering》 |2017年第1期|429-436|共8页
  • 作者单位

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fs laser fabrication; Hot pressing joining; Microano interface structures; Mechanical properties; Thermo-mechanical properties;

    机译:Fs激光制造;热压连接;微/纳米界面结构;机械性能热机械性能;

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