J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (04): 539-542.

• Articles • 上一篇    下一篇

高温高压下硼参与下的亚稳态再结晶石墨形态变化Morphology Change of Meta-stable Re-grown Graphite with Boron Additive under HPHT

臧传义1;胡强1;郭玮2;黄国锋2;贾晓鹏2   

  1. 1. 河南理工大学材料学院
    2. 吉林大学超硬材料国家重点实验室
  • 修回日期:2008-11-01 出版日期:2009-07-28 发布日期:2009-10-10
  • 通讯作者: 臧传义
  • 基金资助:

    50172018;国家自然科学基金;50172018;国家自然科学基金

Morphology Change of Metastable Regrown Graphite with Boron Additive under HPHT

Chuanyi Zang1)†, Xiaozhou Chen1), Qiang Hu1), Wei Guo2), Guofeng Huang2), Xiaopeng Jia2)   

  1. 1) Institute of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
    2) State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China
  • Revised:2008-11-01 Online:2009-07-28 Published:2009-10-10
  • Contact: Chuangyi Zang
  • Supported by:

    the National Natural Science Foundation of China under grant No. 50172018
    the Foundation of He0nan Educational Committee under grant No. 2009A430014
    the Open Research Fund Program of State Key Laboratory of Superhard Materials of Jilin University under grant No. 200801

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摘要：

利用高温高压温度剃度法，NiMnCo合金为触媒，在金刚石稳定区域内，我们合成了不同形态的亚稳态再结晶石墨晶体，尤其有硼存在时，高温高压下球状再结晶石墨的发现为首次报导。生长系统中没有硼存在时，再结晶石墨为片状，多具有规则的六面体形貌，并且垂直站立在触媒中生长；当体系中没有硼存在时，再结晶石墨变化为球状，生长方式为一种螺旋层生长机制。

关键词: 石墨，高温高压，温度剃度法，形貌

Abstract:

By temperature gradient method under high pressure and high temperature (HPHT), with NiMnCo alloy as the solvent metal, at diamond-stable region of about 5.4 GPa and 1500 K, metastable regrown graphite crystals of different morphology were synthesized. With B as an additive incorporated into the NiMnCo-C system, metastable regrown graphite crystals of sphere-like shape were firstly obtained under HPHT. If the growth system does not contain B, sheet-like regrown graphite crystals, most with regular hexagonal morphology, are grown upwards and standing vertically in the metal solvent. When B additive of 1.0 wt pct was added into carbon source (graphite powder), all metastable regrown graphite crystals took on the habit of regular sphere-like morphology, and were grown by a spiral layer growth mechanism.

Key words: Graphite, High pressure and high temperature, Temperature gradient method, Morphology