Review of hydroxyapatite coating prepared by laser cladding

Hydroxyapatite(HA) is one of bioactive ceramics with best bioactivity at present.The techniques for producing its film have become one of the hot points in the material research.As a new technique for changing the surface properties,laser cladding shows the unique advantages for producing HA bioceramic coatings.The quality of the coating is much better than that of the coating produced by other techniques.The characteristics of microstructure and properties of the coating by laser cladding and their influencing factors are reviewed.The effects on the qualities of the coating of laser parameters,reactant composition,rare earth element and gradient coating are analyzed in detail.The future application trend is also prospected.