金属/陶瓷颗粒与接触面的热相互作用数值仿真研究

NUMERICAL MODEL FOR THERMAL INTERACTION BETWEEN METAL/CERAMIC PARTICLES AND THEIR CONTACT INTERFACE

本文利用 ANSYS有限元程序 ,仿真了在等离子喷涂过程中熔融的金属、陶瓷颗粒与接触面的热相互作用 ,给出了“温度—时间”关系以及接触界面处接触温度的研究方法 ;结合功能梯度材料的制备 ,研究了不同材料颗粒 ,包括金属 Ni颗粒 ,Al2 O3陶瓷颗粒与接触界面之间的热相互作用。其结果为研究涂层牢固结合的基本物理化学过程提供了必需的理论依据。

The thermal interaction between metal/ceramic particles and their contact interface in the process of plasma spray is investigated numerically by means of the ANSYS finite element program. The temperature-time relation and the method of simulating temperature at the contact interface are described. In particular, the thermal interaction between different particles, including those among single metal particle (Ni) and single ceramic particle (Al2O3) and the contact interface is taken into account in modeling the process of a functionally gradient material (FGM). These numerical results provide necessary theoretical basis for investigations on the firm bondage between coatings.