Numerical simulation of interfacial reaction between titanium and zirconia  

作　　者：Liu Aihui Li Bangsheng Sui Yanwei Guo Jingjie 

机构地区：[1]Department of Mechanical Engineering, Huaiyin Institute of Technology, Huai＇an 223003, China [2]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

出　　处：《China Foundry》2010年第4期373-376,共4页中国铸造（英文版）

基　　金：supported by the National Natural Science Foundation of China (grant no. 50434030);the Science & Technology Department of Jiangsu Province (grant no. BC2009209)

摘　　要：Based on the conservation laws of energy and mass, and taking into account the effect of chemical reaction between liquid titanium and zirconia ceramic mold on the concentration field and the temperature field, a comprehensive mathematical model for numerical simulation of heat and mass transfer has been established to study the interfacial reaction between liquid Ti and ZrO 2 ceramic mold. With the proposed model, numerical simulations were preformed to investigate the effects of pouring temperature and holding time on the oxygen concentrations and reactive layer thickness in metal. The results showed that both the oxygen concentration and the thickness of reactive layer in metal increase with the increase of the holding time and the pouring temperature. The development of reactive layer thickness with time consists of three stages: inoculation (0-1 s), linear increase (1-5 s) and parabolic increase (after 5 s).Based on the conservation laws of energy and mass, and taking into account the effect of chemical reaction between liquid titanium and zirconia ceramic mold on the concentration field and the temperature field, a comprehensive mathematical model for numerical simulation of heat and mass transfer has been established to study the interfacial reaction between liquid Ti and ZrO 2 ceramic mold. With the proposed model, numerical simulations were preformed to investigate the effects of pouring temperature and holding time on the oxygen concentrations and reactive layer thickness in metal. The results showed that both the oxygen concentration and the thickness of reactive layer in metal increase with the increase of the holding time and the pouring temperature. The development of reactive layer thickness with time consists of three stages： inoculation （0-1 s）, linear increase （1-5 s） and parabolic increase （after 5 s）.

关 键 词：interfacial reaction MODEL TITANIUM ZIRCONIA 

分 类 号：TQ174.758[化学工程—陶瓷工业] TB333[化学工程—硅酸盐工业]