Tungsten（W）coating plasma facing material was fabricated on the copper（Cu）substrate by plasma spraying technology

and effects of the spraying intensity on coating density

heat transfer capability and surface roughness were analyzed.And it was discussed for the transient high heat load performance of tungsten coating by the Nd∶YAG laser.The results reveal that the transient high heat loading is transferred on the surface of coating

and coating failure appears in the surface with absence of obvious crack in coating.The damage behaviors of tungsten coating under the laser transient heat load are involved as follows:the micro-cracks and homogeneous melting

melting tungsten ejection which enhanced the erosion of tungsten due to the splash and evaporation.