摘要
以Ti-B_4C-C为反应喷涂体系,通过碰撞实验和ANSYS有限元分析方法,研究了反应火焰喷涂TiC—TiB_2复相涂层时,喷涂粒子与基体碰撞形成摊片的温度变化情况及其对涂层与基体结合的影响。研究表明,完成自蔓延反应、处于熔融状态的喷涂粒子与基体碰撞形成的摊片各部分温差较大,温度较低,不易使基体表面熔化,难以与基体形成良好结合;自蔓延反应进行中的喷涂粒子与基体碰撞形成的摊片各部分温差较小。温度较高,能较好地实现与基体的结合。模拟结果与实验结果基本吻合。
TiC-TiB2 multiphase coatings were prepared with Ti-B4C-C as the reactive flame spray system. The methods of collision experiment and ANSYS finite element were used to investigate the rule of temperature change of the deposit which came form the single spray particle colliding with the substrate in different state. So the influence of it on the bonding strength between the coatings and substrate was illustrated： It was showed that as for the deposit A, which came into being for the collision of the completely reactive molten spray particles with the substrate, it has relatively larger temperature difference and lower temperature. So it is hard to make the surface of the substrate melt and form metallurgy bonding. As for the deposit B, which came into being for the collision of as-reactive spray particles with the substrate, it has uniform distribution of temperature and relatively higher temperature. So it can realize the metallurgy bonding with the substrate.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A02期651-654,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50272084)
