The Formation Process Of The Coating

the formation process of the coating ① spraying material is heated to the melting state; (2) The sprayed material is atomized into tiny droplets and impinges on the surface of the matrix at high speed. The larger the kinetic energy of particles impinging on the matrix and the larger the impact deformation are, the better the coating bonding is. (3) The molten high-speed particles deform after impact on the surface of the substrate and condense to form the coating. The formation process of the coating is shown in Figure 15. The coating structure is composed of flat particles of various sizes, unmelted spherical particles, inclusions, and pores. The reasons for the existence of pores are low impact kinetic energy of unmelted particles; The shadowing effect caused by different spraying angles; Solidification shrinkage and the stress release effect. The proper pore can store lubricant, improve the insulation performance of the coating, reduce internal stress, and improve thermal shock resistance of the coating, but too much pore will damage the coating corrosion resistance, and increasing the roughness of the surface coating, and reduces the bond strength, hardness, wear resistance of the coating, so in the process of the preparation of the coating should strictly control the amount of porosity.

IKS PVD company, decorative coating machine, tools coating machine, DLC coating machine, optical coating machine, PVD vacuum coating line, the turn-key project is available. Contact us now, E-mail: iks.pvd@foxmail.com