Abstract:Research progress of nano-ceramic coatings prepared by laser cladding is reviewed in brief. The supply style of nano-powder and selection of technical parameters are introduced. The advantages and disadvantages are compared between laser cladding and other methods for preparing nano-ceramic coatings. The microstructure and mechanical properties of metal matrix composites reinforced by nano-particles prepared by laser cladding are analyzed. The present research status and the nano-anti cracking mechanism are especially introduced. The research results show that the addition of nano-particles will remarkably improve the anti cracking property of the coatings,which should be attributed to the increase of interfaces. Other than, the strength, compactness and abrasion resistance are also correspondingly enhanced. Finally, the key technique and the existent questions of the nano-ceramic coatings prepared by laser cladding are expounded, the application and development prospect of this preparation technology are also presented.
Key words:laser cladding; ceramic coatings; nanometer; fracture toughness
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