Corrosion Performance of YSZ Thermal Barrier Coating Modified by Laser on Molten Salt Environment for Engine
The internal combustion engine is greatly affected by heat in the working process,and the workpiece quality will be reduced under the action of thermal expansion and contraction.The key is to prepare a layer of thermal barrier coating on the surface by advanced manufacturing means.Laser surface modification of YSZ thermal barrier coating was carried out by atmospheric plasma spraying.The effect of pulsed laser modification on the stability of the coating was studied.The results show that the laser modified coating forms a dense columnar surface structure,cracks and pores have obvious effects on the thermal insulation performance of the coating,the surface of the coating is flat,and the vertical crack width is small.A higher intensity XRD diffraction peak is formed in the modified coating,and a metastable phase is formed in the modified layer,which has more structure.This research is helpful to improve the metallurgical bonding property of the body layer and the matrix,and has high application value.