石墨通过爆炸相变为金刚石的新结构位置转变模型(上)

The Kai model of structure position conversion for phase change from graphite to diamond through explosion

石墨粉层受到击波高速冲击后,在高温高压下,会以固相结构方式转变为金刚石,文章作者创立了一个新的转变模型,在文中简称为"凯"模型,包括:在ABCA型石墨的转化理论中,找到了具体哪18个碳原子向金刚石晶胞转变的原子对应点结构,使活化能的计算可接近最小值。在ABA型石墨转化理论中,除石墨网格平面间的压缩之外,必须考虑层间剪切错动的作用,剪切变形与层间压缩的概率都同样多。标志其特性错动的距离是0.521h,h-层间压缩距离,理论被实验所征实。

Graphite powder subjected high velocity impact, under high pressure and tem- perature can be changed from graphite to diamond according to solid phase structure. In this paper the authors have found the model named Kai model. In the transformation mechanism of ABCA type graphite, it has found the corresponding structure of concrete 18 carbon atoms which is changed to diamond unit, the count of activated energy U may be approached to minimum. In the transformation mechanism of ABA type graphite, it must be to consider the effect of shear and slippage besides the compression between layers. The probability of shearing deformation and compression between layers is the same more, to symbolize the specific distance of shearing slippage is 0. 521 h { h-the compressed distance between two layers）. The theory is confirmed by experiment.