【摘要】 与热喷涂及其它传统的涂层技术相比,冷喷涂技术有其独特的优点,即可使采用该技术沉积的涂层保留喷涂前粒子的特性。但在冷喷涂沉积过程中,粒子的尺寸小、速度快、温度低,给实时监测和分析带来很大困难。综述了冷喷涂喷管中气体和粒子运动状态的数学模型,指出使用数学模型建立工作气体和喷涂粒子相互作用的关系,可以快速优化喷管内部几何结构和喷涂过程参数,提高涂层质量,降低实验成本,同时也为阐述冷喷涂粒子沉积机理提供了一种有力手段。更多还原

【Abstract】 Compared to the traditional thermal spray and other coating fabrication techniques,cold spray has some unique characteristics that sprayed coatings can retain the initial powder microstructure.In cold spray process,the kinematics parameters of the particles are difficult to observe and analyze,because they can attain a super high velocity in the nozzle,in addition with their low temperature and small size.The simulation models of the propellant gas and the particles properties in the nozzle are summarized.It is pointed out that employing mathematical simulation methods to create models about the interaction between the particles and propellant gas can be used to design the geo-metry structure of the nozzle and optimize the spraying parameters.It is considered as a valuable supplementary tool to illustrate the deposition mechanism as well as decrease the experiment cost and promote the coating quality.更多还原