Abstract
Based on a proposed phase transition model of free carbon, the synthesis of ultrafine diamond (UFD) during explosive detonation is numerically simulated. Thermodynamic parameters in the detonation reaction zone are estimated according to simple assumptions. KHT equation of state is used to calculate the detonation parameters of explosives and the equation of state of detonation products. The process of expansion of the detonation products under different conditions of preservation is simulated through the use of DYNA2D code. The phase transition from liquid carbon to diamond includes crystal nucleation and crystal growth. The influence of diamond graphitization is also evaluated. The nucleation rate, linear growth velocity, graphitization rate, yield and particle-size distribution of diamond under different charge conditions and preservation conditions are calculated. Some useful conclusions are made on the basis of the calculated results.
| Original language | English |
|---|---|
| Pages (from-to) | 7-12 |
| Number of pages | 6 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 23 |
| Issue number | 1 |
| Publication status | Published - Feb 2003 |
Keywords
- Detonation
- Explosives
- Numerical simulation
- Ultrafine diamond