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Microstructure and mechanical properties of carbon nanotubes reinforced titanium matrix composites fabricated via spark plasma sintering

机译:火花等离子烧结制备碳纳米管增强钛基复合材料的组织和力学性能

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摘要

The influence of various dispersion methods on the evolution of multi-walled carbon nanotubes (MWCNTs) in titanium (Ti) metal matrix composites (TMCs) prepared via spark plasma sintering (SPS) have been investigated. The synthesis procedures included sonication, high energy ball milling (HEBM), and rapid consolidation of powder mixtures at different sintering temperatures. The impact energy provided to the powder mixtures during HEBM process was optimized to disperse 0.5 wt% MWCNTs into Ti matrix in two controlled ball milling processes: with and without in-situ formation of TiC during HEBM. The interfacial reactions between MWCNTs and Ti matrix were controlled by retaining the crystallinity and sp~2 carbon network of the MWCNTs even at high sintering temperature of 800 ℃, which enhanced their compressive strength up to 1056 MPa with a compressive strain of 27.31%. The mechanical and tribological properties of the composites consolidated from the powder mixtures with in-situ TiC formation during HEBM and pre-sonicated MWCNTs were significantly enhanced as opposed to the composites consolidated from the powder mixtures without formation of TiC during HEBM.
机译:研究了各种分散方法对通过火花等离子体烧结(SPS)制备的钛(Ti)金属基复合材料(TMC)中多壁碳纳米管(MWCNT)演变的影响。合成程序包括超声处理,高能球磨(HEBM)和在不同烧结温度下快速固化粉末混合物。优化了在HEBM过程中提供给粉末混合物的冲击能,以两种控制球磨过程将0.5 wt%的MWCNT分散到Ti基体中:HEBM期间有或没有原位形成TiC。即使在800℃的高烧结温度下,也通过保持MWCNT的结晶度和sp〜2碳网络来控制MWCNT与Ti基体之间的界面反应,从而将其压缩强度提高到1056 MPa,压缩应变为27.31%。从粉末混合物固结的复合材料的机械和摩擦学性能在HEBM和预超声处理的MWCNTs中具有原位形成TiC的复合材料得到了显着增强,这与从粉末混合物固结的复合材料在HEBM期间没有形成TiC形成了鲜明的对比。

著录项

  • 来源
    《Materials Science and Engineering》 |2017年第14期|505-523|共19页
  • 作者单位

    School of Engineering, RMIT University, Bundoora, Victoria 3083, Australia;

    State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;

    College of Materials Science and Engineering, Jilin University, Changchun, Jilin 130025, China,Advanced Material Research and Development Center, Zhejiang Industry & Trade Vocational College, Wenzhou, Zhejiang 325003, China;

    School of Engineering, RMIT University, Bundoora, Victoria 3083, Australia;

    School of Engineering, RMIT University, Bundoora, Victoria 3083, Australia;

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

    Carbon nanotubes; High energy ball milling; Spark plasma sintering; Titanium matrix composites; Microstructure; Raman spectroscopy;

    机译:碳纳米管;高能球磨;火花等离子体烧结;钛基复合材料;微观结构拉曼光谱;

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