Synthesis of Polycrystalline Diamond from Carbon Nanotubes Using Direct Detonation Method

Shiyuan SHANG; Yi TONG; Zhichao WANG; Fenglei HUANG

doi:10.12382/bgxb.2022.0268

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Synthesis of Polycrystalline Diamond from Carbon Nanotubes Using Direct Detonation Method

更新时间：2025-08-18

- Synthesis of Polycrystalline Diamond from Carbon Nanotubes Using Direct Detonation Method
- Acta Armamentarii Vol. 44, Issue 7, Pages: 1993-2001(2023)
- 作者机构：
  
  北京理工大学爆炸科学与技术国家重点实验室, 北京 100081
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2022.0268
  CLC：
- Received：15 April 2022，
  
  Published Online：07 August 2023，
  
  Published：30 July 2023
- 稿件说明：
移动端阅览
Shiyuan SHANG, Yi TONG, Zhichao WANG, et al. Synthesis of Polycrystalline Diamond from Carbon Nanotubes Using Direct Detonation Method[J]. Acta Armamentarii, 2023, 44(7): 1993-2001.
DOI：

Shiyuan SHANG, Yi TONG, Zhichao WANG, et al. Synthesis of Polycrystalline Diamond from Carbon Nanotubes Using Direct Detonation Method[J]. Acta Armamentarii, 2023, 44(7): 1993-2001. DOI： 10.12382/bgxb.2022.0268.

摘要

为研究碳纳米管在爆轰过程中的变化机理

采用直接爆轰法

以碳纳米管为外加碳源进行合成实验

对爆轰产物进行化学提纯后得到提纯产物

通过X射线衍射技术对提纯产物进行表征

发现提纯产物为金刚石。借助透射电子显微镜和扫描电子显微镜对提纯产物形貌进行表征

通过深入分析

发现爆轰过程中碳纳米管以固-固原位相变的形式相变为金刚石

且同一个碳纳米管上会形成多个晶核同时生长形成晶体

相邻的晶体接触后形成晶界

停止生长并形成聚晶体。根据形成的金刚石晶体的周向、径向、轴向尺寸的不同

以及形成聚晶体中晶体的数量与位置的不同

可以得到管状、片状、块状等形状各异的聚晶金刚石颗粒。

Abstract

To study the phase transformation mechanism of carbon nanotubes during detonation

synthesis experiments were carried out using direct detonation method with carbon nanotubes as the additional carbon source. The detonation product was chemically purified. X-ray diffraction (XRD) was used to characterize the purified product

and it was found that the product consisted of diamond. The purified product was characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM)

and after in-depth analysis

it was found that the carbon nanotubes transformed into diamond through solid in situ phase change during the detonation process. Multiple cores were observed on a carbon nanotube to form crystals at the same time. When adjacent crystals came into contact

crystal boundaries were formed

limiting growth in specific directions to form polycrystals. Depending on the circumferential

radial and axial dimensions of the formed diamond crystals

as well as the number and position of the crystals in the formed polycrystals

polycrystalline diamond particles of different shapes such as tubes

flakes

and blocks were obtained.

关键词

Keywords

references

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