利用计算机模拟对泡生法蓝宝石单晶各生长阶段的热应力进行了分析,发现晶体中最大热应力位于籽晶与新生晶体交界处或靠近固液界面的晶体边缘,其次位于晶体肩部.在此基础上,针对某一生长阶段讨论了加热器位置和坩埚形状对晶体中热应力分布的影响.结果表明:固液界面处的热应力随着加热器轴向中点与熔体轴向中点的距离L的增加先减后增,当L为190mm时,晶体中热应力最小；随着坩埚底部倒角半径的增加,固液界面处热应力呈上升的趋势.
参考文献
| [1] | 韩杰才,左洪波,孟松鹤,张明福,姚泰,李长青,许承海,汪桂根.泡生法制备大尺寸蓝宝石单晶体[J].人工晶体学报,2005(01):193-193. |
| [2] | Demina SE;Bystrova EN;Postoov VS;Eskov EV;Nikolenko MV;Marshanin DA;Yuferev VS;Kalaev VV .Use of numerical simulation for growing high-quality sapphire crystals by the Kyropoulos method[J].Journal of Crystal Growth,2008(7/9):1443-1447. |
| [3] | 姚泰,左洪波,韩杰才,张明福,孟松鹤,姚秀荣,李常青,汪贵根,许承海.蓝宝石单晶生长过程中应力分布的数值模拟[J].哈尔滨理工大学学报,2006(05):100-104. |
| [4] | Xu Chenghai;Meng Songhe;Zhang Mingfu;Zuo Hongbo;Wang Guigen .Thermal Stresses and Cracks During the Growth of Large-sized Sapphire with SAPMAC Method[J].Chinese Journal of Aeronautics,2007(5):475-480. |
| [5] | 许承海,杜善义,孟松鹤,韩杰才,汪桂根,左洪波,张明福.蓝宝石晶体热性能的各向异性对SAPMAC法晶体生长的影响[J].人工晶体学报,2007(06):1261-1265. |
| [6] | Chen T C et al.The effect of interface shape on anisotropic thermal stress of bulk single crystal during Czochralski growth[J].Journal of Crystal Growth,1997,173:367. |
| [7] | Chun-Hung Chen;Jyh-Chen Chen;Chung-Wei Lu;Che-Ming Liu .Numerical simulation of heat and fluid flows for sapphire single crystal growth by the Kyropoulos method[J].Journal of Crystal Growth,2011(1):162-167. |
| [8] | W.J. Lee;Y.C.Lee;H.H. Jo;Y.H. Park .Effect of crucible geometry on melt convection and interface shape during Kyropoulos growth of sapphire single crystal[J].Journal of Crystal Growth,2011(1):248-254. |
| [9] | 闽乃本.晶体生长的物理基础[M].上海:上海科学技术出版社,1982:458. |
| [10] | S.E. Demina;E.N. Bystrova;M.A. Lukanina;V.M. Mamedov;V.S. Yuferev;E.V. Eskov;M.V. Nikolenko;V.S. Postolov;V.V. Kalaev .Numerical analysis of sapphire crystal growth by the Kyropoulos technique[J].Optical materials,2007(1):62-65. |
| [11] | O. Budenkova;M. Vasiliev;V. Yuferev;V. Kalaev .Effect of internal radiation on the solid–liquid interface shape in low and high thermal gradient Czochralski oxide growth[J].Journal of Crystal Growth,2007(1):156-160. |
| [12] | S.E. Demina;V.V. Kalaev .3D unsteady computer modeling of industrial scale Ky and Cz sapphire crystal growth[J].Journal of Crystal Growth,2011(1):23-27. |
| [13] | 汪传勇,左然,Andrey Smirnov,Kirill Mazaev.泡生法生长蓝宝石单晶的热场改进与模拟优化[J].人工晶体学报,2011(01):83-87. |
| [14] | STR Group .CGSim Material Data Base,v.9.3[OL].http://www.semitech.us,2011. |
| [15] | 许承海,孟松鹤,韩杰才,张明福,左洪波.SAPMAC法生长大尺寸蓝宝石晶体的碎裂分析[J].硅酸盐通报,2009(z1):186-189. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%