Research and progress in the modification plasma-sprayed ceramic coating by laser technique

In recent years,the modification of plasma-sprayed ceramic coatings by laser technique has been widely investigated and made a great progress at home and abroad.It will broaden the application fields of plasma-sprayed ceramic coatings such as in automobile engines and chemical industry to an extreme extent.This paper summarizes the latest research achievements at home and abroad from following aspects:laser treatment of plasma-sprayed cerarnic coatings to densify the ceramic coatings,to enhance the homogeneity of microstructure and phase structures,to increase the hardness,wear/corrosion/thermal-shock resistance.Finally,the problems remained and the developing trends have been pointed out in this field.