基于ф69mm腔体温度场数值模拟的高品级金刚石合成工艺优化  

Optimization of diamond synthesis process based on numerical simulation on temperature field in ф69 chamber

作　　者：卢金斌[1,2] 穆云超[1] 王秦生[1] 张旺玺[1] 王志新[1] 刘广利 薛胜辉 刘明耀[3] 

机构地区：[1]中原工学院,郑州450007 [2]郑州华晶金刚石股份有限公司,郑州450001 [3]郑州磨料磨具磨削研究所,郑州450001

出　　处：《金刚石与磨料磨具工程》2010年第6期50-53,共4页Diamond & Abrasives Engineering

摘　　要：采用有限元软件Ansys对HJ-1000型六面顶压机669mm金刚石合成腔体进行了间接加热温度场的分析，在数值模拟的基础上，对合成过程中的温度和压力进行了优化，并通过优化得到了温度压力动态匹配的合成工艺。对合成柱中的温度进行了计算并做成温度云图，结果表明：合成柱中的温度在加热过程中基本保持石墨管处温度最高，直到开始断电冷却，石墨管处的温度下降较快，使得在合成柱中心点处的温度最高，径向温差小于30℃，具备了温度压力相匹配的合成优质高品级金刚石的生长环境。这主要是因为合成腔体较大和优化的加热工艺有关。最后采用优化的金刚石合成工艺，获得了粒径600～650μm高品级金刚石。The temperature field in the diamond synthesis chamber when taking indirect heating method was investigated by finite element method, and based on the numerical simulation to the temperature, the diamond synthesis process was optimized in order that the temperature could match with the pressure dynamically. Then the temperature in the synthesis column was calculated and was drown into temperature cloud photograph. The results showed that in the process of heating, the temperature around the graphite tube in the synthesis column was the highest, and after cutting off the power supply, the temperature at the graphite tube went down more quickly, such that the temperature around the center became the highest, and the radial temperature difference was less than 30 ℃, thus providing a suitable growing environment for high-quality diamond. The reasons may be related to the bigger synthesis chamber and the optimization of the heating process. By using optimized synthesis process, high quality diamonds of grain diameter 600 -650μm were obtained.

关 键 词：温度场 间接加热 高品级金刚石 数值模拟 优化工艺 

分 类 号：TQ164[化学工程—高温制品工业]