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Microstructure and properties of the sintered diamond reinforced by diamond-MWCNTs composite fibers

机译:金刚石-碳纳米管复合纤维增强烧结金刚石的组织与性能

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摘要

A new type of sintered diamond reinforced by diamond MWCNTs composite fibers which were randomly orientated and even distributed in the diamond matrix was synthesized by using 3wt% mulhi-walled carbon nanotubes(MWCNTs) as starting additive under high pressure of 5.8 GPa at temperature of 1500 ℃ for 1 min. A special polycrystalline diamond structure of direct bonding of both diamond to diamond and diamond to diamond-MWCNTs composite fiber was observed. The testing results show that it possesses not only high hardness (49~52 GPa) and Young's modulus (878 GPa) but also high bending strength (1320 ~ 1540 GPa)and fracture toughness (9.0 ~ 9. 2 MPa · m1/2) as it was theoretically predicted. The high performances of the composite were contributed by the fiber strengthening effect and the special structure which can offer more extensive diamond to diamond bonding.
机译:以3wt%的多壁碳纳米管(MWCNTs)为起始添加剂,在5.8 GPa的高压和1500℃的高压下,合成了由金刚石MWCNTs复合纤维增强的新型烧结金刚石,该复合纤维无规取向并均匀分布在金刚石基质中。 ℃1分钟。观察到一种特殊的多晶金刚石结构,该结构将金刚石与金刚石直接结合以及金刚石与金刚石-MWCNTs复合纤维直接结合。测试结果表明,它不仅具有较高的硬度(49〜52 GPa)和杨氏模量(878 GPa),而且还具有较高的弯曲强度(1320〜1540 GPa)和断裂韧性(9.0〜9。2 MPa·m1 / 2)正如理论上预测的那样。复合材料的高性能归功于纤维的增强作用和特殊的结构,可以提供更广泛的金刚石与金刚石的粘结。

著录项

  • 来源
  • 会议地点 Zhengzhou(CN)
  • 作者单位

    Deng Fuming@Department of Materials Science and Engineering, China;

    University of Mining and Technology, Beijing Campus, Beijing, 100083, China;

    Department of Physics, Zhejiang University, Hangzhou, 310027, China--Lu Xuejun@Department of Materials Science and Engineering, China;

    University of Mining and Technology, Beijing Campus, Beijing, 100083, China;

    Beijing Institute of Electro-machining, Beijing, 100083, China--Liu Ruiping@Department of Materials Science and Engineering, China;

    University of Mining and Technology, Beijing Campus, Beijing, 100083, China--Xu Guojun@Beijing Institute of Electro-machining, Beijing, 100083, China--Chen Quwu@Department of Materials Science and Engineering, China University of Mining and Technology, Beijing Campus, Beijing, 100083, China--Li Wenzhu@Department of;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TTB30;
  • 关键词

    mullti-walled carbon nanotubes (MWCNTs); nano-polycrystalline diamond fiber; high pressure high temperature (HP-HT); properties;

    机译:多壁碳纳米管;纳米多晶金刚石纤维;高温高压;性能;

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