Finite Element Analysis of Convection in Growth Cell for Diamond Growth Using Ni-Based Solvent |
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Authors: | TIAN Yu JIA Xiao-Peng ZANG Chuan-Yi LI Rui LI Shang-Sheng XIAO Hong-Yu ZHANG Ya-Fei HUANG Guo-Feng HAN Qi-Gang MA Li-Qiu LI Yong CHEN Xiao-Zhou ZHANG Cong MA Hong-An |
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Institution: | State Key Lab of Superhard Materials, Jilin University, Changchun 130012Henan Polytechnic University, Jiaozuo 454000Changchun University of Science and Technology, Changchun 130012 |
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Abstract: | Thermal-electrical-fluid coupled finite element analyses are performed in the model of the growth cell in a high-pressure and high-temperature (HPHT) cubic apparatus in which the large diamond crystal can be grown by using Ni-based solvent with temperature gradient method (TGM). The convection in the Ni-based solvent with different thicknesses at 1700-1800K is simulated by finite element method (FEM). The experiments of diamond crystal growth are also carried out by using Ni-based solvent at 5.7GPa and 1700-1800K in a China-type cubic high pressure apparatus (CHPA). The simulation results show that the Rayleigh number in the solvent is enhanced obviously with the increasing solvent thickness. Good quality diamond single crystal cannot be grown if the Rayleigh number in the solvent is too high. |
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Keywords: | 81 05 Uw 81 10 Aj 81 10 Dn 81 10 -h |
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