高温高压作用后叶蜡石腔体密度分布及流动规律探讨

文章对高温高压合成金刚石后叶蜡石块不同部位进行了密度测试,通过对叶蜡石不同方向密度的对比分析,讨论和分析了叶蜡石在高温高压下的塑性流动规律。结果表明,叶蜡石外部密度大于内部密度,有从外部向内部流动的趋势;上部密度大于下部密度,有从上向下流动的趋势;叶蜡石密封边中部密度大于顶角处密度,有从密封边中部向顶角处流动的趋势;叶蜡石外表面顶角密度大于中心密度,与三顶锤接触的叶蜡石块顶角位置附近区域是叶蜡石块中密度最高部位,这是在顶锤之间的叶蜡石密封边已建立起高压密封情况下造成的。

Study on the density distribution and plastic flow behaviour of pyrophyllite under high temperature and pressure

In this paper the densities at different parts of the pyrophyllite vessel after diamond synthesis under HT/HP were tested,and the plastic flow behavior of the pyrophyllite at HT/HP was discussed through analyzing the density distribution of the pyrophyllite vessel at different directions.It was found that the density of the external and up part of the pyrophyllite vessel were greater than that of the internal and down part,and the density of the seal at the central part was greater than that of seal part of the vertex,therefore there are plastic flow trends of pyrophyllite from external to internal,from up to down and from the center of the surface to the edges.The greatest density exist in the vertex part near the three carbide anvils,it owns to result of the plastic flow of the pyrophyllite after the establishing of the high pressure seal of the pyrophyllite vessel.