The invention discloses a
zirconium cladding surface resistant to high temperature and oxidation ZrCrFe / AlCrFeTiZr composite gradient
coating preparing technology. Ultrahigh vacuum multitarget co-
sputtering technique is adopted, a ZrCrFe / AlCrFeTiZr composite gradient
alloy resistant to high temperature and oxidation protecting
coating is prepared on the surface of a
zirconium alloy base body, and the
zirconium cladding surface resistant to high temperature and oxidation ZrCrFe / AlCrFeTiZr composite gradient
coating preparing technology comprises the steps of predepositional treatment, bias
voltage anti-splash washing and ZrCrFe / AlCrFeTiZr composite gradient
alloy coating deposition. The preparing process of the
composite coating is divided into two steps, the first step is to prepare ZrCrFe gradient
transition layer coating, in a deposited ZrCrFe
transition layer, the atomic percentage content of
Zr element is changed from the gradient of 100 at%-35 at% in the thickness direction, the atomic percentage content of
Cr element is changed from the gradient of 0 at%-33 at% in the thickness direction, and the atomic percentage content of
Fe element is changed from the gradient of 0 at%-33 at% in the thickness direction; the second step is to prepare a AlCrFeTiZr high-entropy
alloy coating, in a deposited AlCrFeTiZr high-entropy
alloy coating, the atomic percentage content of
Al element is controlled in 0.5 at%-1.0at %, and the atomic percentage of other elements is between 10 at%-35 at%. Bonding force of the coating prepared by the technology is excellent, the surface is dense and uniform, and the coating has excellent performance such as high strength, resistance to high temperature and oxidation and
irradiation resistance.