FEM simulations and experimental studies of the temperature field in a large diamond crystal growth cell
FEM simulations and experimental studies of the temperature field in a large diamond crystal growth cell
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大型金刚石晶体生长池温度场的有限元模拟和实验研究
DOI：
10.1088/1674-1056/22/1/014701
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发表时间：
2013-01-01
影响因子：
1.7
通讯作者：
Ma Hong-An
中科院分区：
文献类型：
--
作者：
Li Zhan-Chang;Jia Xiao-Peng;Ma Hong-An
采用温度梯度法（TGM）研究了高温高压下金刚石晶体生长过程中，在密闭容器中生长区域温度场的变化规律。我们采用有限元法（FEM）和原位实验。模拟结果表明，在大尺寸金刚石晶体生长过程中，生长池中心区域的温度持续下降。这些结果与我们的实验数据吻合良好，这表明，有限元模型可以成功地预测在生长细胞的温度场变化。有限元模拟结果对利用梯度生长法生长大尺寸高质量金刚石晶体具有指导意义。此外，该方法将有助于设计更好的单元和改善宝石级金刚石晶体的生长过程。
We investigate the temperature field variation in the growth region of a diamond crystal in a sealed cell during the whole process of crystal growth by using the temperature gradient method (TGM) at high pressure and high temperature (HPHT). We employ both the finite element method (FEM) and in situ experiments. Simulation results show that the temperature in the center area of the growth cell continues to decrease during the process of large diamond crystal growth. These results are in good agreement with our experimental data, which demonstrates that the finite element model can successfully predict the temperature field variations in the growth cell. The FEM simulation will be useful to grow larger high-quality diamond crystal by using the TGM. Furthermore, this method will be helpful in designing better cells and improving the growth process of gem-quality diamond crystal.