高温高压条件下石墨的再结晶与金刚石单晶的生长

The Graphitic Recrystallization and Growth of Diamond under High Pressure and Temperature

1.
State Key Laboratory for Superhard Materials, Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China;
2.
Electron Microscope Laboratory, Changchun University of Earth Science, Changchun 130026, China

摘要: 用电子显微镜观察到了在高温高压条件下再结晶石墨的形状随温度变化而改变的规律。实验表明：从石墨向金刚石的转变，与石墨在催化剂溶剂合金中的再结晶状态有关，类球形再结晶石墨是转变成金刚石小单元的基础。金刚石晶体的不同形态及其多样化的表面结构表明金刚石单晶的生长具有比较复杂的过程。研究了具有一定规则形状由类球形再结晶石墨晶粒组成的聚合体，这种聚合体将在适当温度压力下转变成金刚石颗粒。本研究给出了生长粗颗粒、晶形完整的金刚石单晶的原则办法。
- 高温高压 /
- 再结晶石墨 /
- 金刚石
Abstract: In this paper, we have observed graphitic recrystallization with different shapes under high pressure and different high temperature. One revealed that the transformation from graphite into diamond is related to spherical graphitic recrystallization in the catalyst-solvent alloy. The different shapes and surface of diamond crystals have showed that diamond growth is a complex process. One also studied a graphitic recrystallization grains with shape of hexagon-octahedron which are a fundamentals transforming into diamond. In these studies, we have found that the method was used to grow a larger and regular diamond crystal.
- high temperature and high pressure /
- recrystallization of graphite /
- diamond