碳的雨贡纽状态方程及动压合成金刚石机理——动压合成金刚石之二

Rankine-Hugoniot of Carbon and Mechanism of Diamond Sythesis by Dynamic Pressure——diamond synthesis by dynamic pressure,part two

动压法已经成为纳米金刚石和多晶金刚石的主要合成方法,按照方法的不同又可以分成爆轰法、爆炸法和激光法等多种方法。文章论述了碳的雨贡纽状态方程和碳的高压相图。分析了爆轰法、爆炸法和激光法等几种不同方法合成金刚石的原理。估算出石墨直接转化金刚石所必须越过的势垒值为8.565×104J·mol-1,其激光源的功率密度不应低于2.534×105 W·cm-2。

The dynamic pressure technique has become a principal technique for nano-dia- mond and polycrystalline diamond synthesis. This technique can be classified into several methods according to the different ways of operation such as detonation method, explo- sion method and laser method. The Rankine-Hugoniot and high pressure phase diagram of Carbon has been discussed in this article along with the principle of the diamond syn- thesis by different methods such as detonation method, explosion method and laser meth- od. The minimum barrier value for the direct transformation of graphite into diamond is estimated to be 8. 565 ×104J · mol-1 and power density of its laser source should not be less than 2. 534×105 W·cm-2.