Metal/ceramic dual-phase composite coating with microbiological corrosion resistance and preparation method thereof

The invention discloses a metal/ceramic dual-phase composite coating with microbiological corrosion resistance and a preparation method thereof. The preparation method of the metal/ceramic dual-phasecomposite coating with the microbiological corrosion resistance comprises the step that a metal/ceramic composite coating of a micronano composite structure is formed on the surface of a Ti-6Al-4V alloy workpiece by means of a bicathode plasma sputtering deposition technology, wherein the technological parameters for bicathode plasma sputtering deposition include that the voltage of a target material is 850-950 V, the voltage of the workpiece is 300-350 V, the inter-electrode distance is 8-10 mm, the working air pressure is 35-40 Pa, the deposition temperature is 700-850 DEG C, and the deposition time is 3.0-3.5h; and the target material is a mixed Fe2O3-Al-Cr-Co-Ni-Cu target and comprises the components including 22.97% of Fe2O3, 11.63% of Al, 22.40% of Cr, 16.94% of Co, 16.94% of Ni and9.12% of Cu. The metal/cer