Method for preparing CuNiIn coating material and coating layer

The present invention discloses a CuNiIn coating material and a preparation method for the coating, wherein, the CuNiIn coating material is copper-nickel-indium alloy powder, and consists of ingredients of: nickel with weight percentage ranging from 30 percent to 40 percent, indium with weight percentage ranging from 3 percent to 10 percent, and remained copper. Granule of the copper-nickel-indium alloy powder is ranging from -100 mesh to +500 mesh, and granule of a main body is within a range from -120 mesh to +400 mesh. The technology of the CuNiIn coating prepared by the CuNiIn coating material is to adopt the technique of atmospheric plasma or flame thermal spraying, and technique parameters for preparation of the copper-nickel-indium coating are: arc current is less than or equal to 600A; arc voltage is less than or equal to 90V; argon pressure ranges from 0.6MPa to 0.9MPa; argon flow ranges from 20L/min to 50L/min; powder feeding speed ranges from 10g/min to 60g/min; spraying distance ranges from 150mm