Thermal barrier coating containing V-shaped vertical cracks, preparation method and preparation device

The invention provides a thermal barrier coating containing V-shaped vertical cracks, a preparation method and a preparation device. The thermal barrier coating containing the V-shaped vertical cracks comprises an atmosphere plasma spraying unit, a preheating unit, a cooling unit and a fixing unit. The atmosphere plasma spraying unit is provided with a spraying gun, the preheating unit is provided with a laser emitting head, and the cooling unit is provided with a liquid carbon dioxide spraying pipe; the fixing unit is provided with a movable clamp, and the liquid carbon dioxide injection pipe, the laser emission head and the spray gun are sequentially fixed to the clamp in the moving direction of the clamp. The deposition process of the ceramic coating is divided into N rounds, each round of deposition is conducted for n times, in the nth time of deposition of each round, the deposited ceramic coating is instantaneously heated and instantaneously cooled by means of a preheating unit and a cooling unit, and t