中国物理B ›› 2012, Vol. 21 ›› Issue (9): 98101-098101.doi: 10.1088/1674-1056/21/9/098101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Effects of carbon convection field on large diamond growth under high-pressure high-temperature conditions

胡美华a, 李尚升a, 马红安b, 宿太超a, 李小雷a, 胡强a, 贾晓鹏a b   

  1. a School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
    b State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2011-08-01 修回日期:2011-10-30 出版日期:2012-08-01 发布日期:2012-08-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50572032, 50731006, and 50801030) and the Young Scientists Fund of the National Natural Science Foundation of China (Grant Nos. 51001042 and 51002045).

Effects of carbon convection field on large diamond growth under high-pressure high-temperature conditions

Hu Mei-Hua (胡美华)a, Li Shang-Sheng (李尚升)a, Ma Hong-An (马红安)b, Su Tai-Chao (宿太超)a, Li Xiao-Lei (李小雷)a, Hu Qiang (胡强)a, Jia Xiao-Peng (贾晓鹏)a b   

  1. a School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
    b State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2011-08-01 Revised:2011-10-30 Online:2012-08-01 Published:2012-08-01
  • Contact: Jia Xiao-Peng E-mail:jiaxp@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50572032, 50731006, and 50801030) and the Young Scientists Fund of the National Natural Science Foundation of China (Grant Nos. 51001042 and 51002045).

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摘要： Large diamond crystals were successfully synthesized by FeNi-C system using temperature gradient method under high-pressure high-temperature conditions. The assembly of the growth cell was improved and the growth process of diamond was investigated. Effects of the symmetry of carbon convection field around the growing diamond crystal were investigated systematically by adjusting the position of seed crystal in the melted catalyst/solvent. The results indicate that morphologies and metal inclusion distributions of the synthetic diamond crystals vary obviously in both symmetric and non-symmetric carbon convection fields with temperature. Moreover, finite element method was applied to analyze carbon convection mode of the melted catalyst/solvent around the diamond crystal. This work is helpful for understanding the growth mechanism of diamond.

关键词: diamond, high pressure and high temperature, temperature gradient method, carbon convection field

Abstract: Large diamond crystals were successfully synthesized by FeNi-C system using temperature gradient method under high-pressure high-temperature conditions. The assembly of the growth cell was improved and the growth process of diamond was investigated. Effects of the symmetry of carbon convection field around the growing diamond crystal were investigated systematically by adjusting the position of seed crystal in the melted catalyst/solvent. The results indicate that morphologies and metal inclusion distributions of the synthetic diamond crystals vary obviously in both symmetric and non-symmetric carbon convection fields with temperature. Moreover, finite element method was applied to analyze carbon convection mode of the melted catalyst/solvent around the diamond crystal. This work is helpful for understanding the growth mechanism of diamond.

Key words: diamond, high pressure and high temperature, temperature gradient method, carbon convection field

中图分类号:  (Diamond)

  • 81.05.ug
61.72.Lk (Linear defects: dislocations, disclinations) 07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells) 07.20.Ka (High-temperature instrumentation; pyrometers)