A kind of Fe-cr-al-y protective coating for zirconium alloy protection and its preparation method and application
A zirconium alloy and coating technology, which is applied in the field of Fe-Cr-Al-Y protective coating for zirconium alloy protection and its preparation, can solve the problems of thick FeCrAl alloy clad pipe, complex preparation method, and low production efficiency , to achieve the effect of saving raw materials, controllable process and high production efficiency
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[0052] The schematic diagram of the preparation device of all embodiments of the present invention is as attached figure 1 As shown, vacuumize chamber 1, when the background vacuum of chamber 1 is ≤3.6×10 -5 Pa, start to heat the sample 3 fixed on the sample stage 2 at 300-550°C and keep it warm for 1h (if the sample is in the shape of a tube, the sample will rotate counterclockwise along the axis of the tube at a rotation speed of 10r / min, and the sample stage 2 Rotate along the Z axis in the XY plane, so as to ensure the uniformity of the Fe-Cr-Al-Y protective coating on the surface of the tubular sample. If the sample is planar, then ensure that the sample stage 2 rotates along the Z axis in the XY plane, so as to To ensure the uniformity of the Fe-Cr-Al-Y protective coating on the surface of the planar sample), a bias voltage of -20V to -10V is applied to the sample, Ar gas is introduced through the inlet 5 as the sputtering gas source, and the output is controlled by The...
Embodiment 1
[0068] This embodiment is prepared by the above-mentioned magnetron sputtering method, and the parameters are set as: background vacuum 8×10 -5 Pa, chamber air pressure 0.5Pa, 4A target power density 0.9W / cm 2 , 4B target power density is 4.4W / cm 2 , 4C target power density 0.1W / cm 2 . Simultaneously sputtering 4A target, 4B target and 4C target for 8 hours, the obtained composition is Fe 70.1 Cr 14.9 Al 13.8 Y 1.1 coating with a thickness of 9 μm.
[0069] Structural characterization of the prepared Fe-Cr-Al-Y protective coating, as attached figure 2 As shown, the crystal structure is a solid solution structure of α-Fe(Cr,Al), and the (110), (200) and (211) crystal plane diffraction peaks appear at 2θ=44.6°, 65.0° and 82.3°, respectively. The density of the coating is 8.3g / cm 3 ,Such as image 3 As shown, the coating has a fibrous columnar growth structure, the boundary between two adjacent fibrous columnar structures is dense, there is no penetrating void, and th...
Embodiment 2
[0073]This embodiment is prepared by the above-mentioned magnetron sputtering method, and the parameters are set as: background vacuum 8×10 -5 Pa, chamber air pressure 0.5Pa, 4A target power density 0.9W / cm 2 , 4B target power density is 6.2 W / cm 2 , 4C target power density 0.2W / cm 2 . Simultaneously sputter 4A target, 4B target and 4C target for 8h, and the composition is Fe 37.5 Cr 25 Al 35 Y 2.5 coating with a thickness of 10 μm.
[0074] Structural characterization of the prepared Fe-Cr-Al-Y protective coating, the crystal structure is a solid solution structure of α-Fe(Cr, Al), and (110) and (200) crystal planes appear at 2θ=44.6° and 65.0° Diffraction peaks. The density of the coating is 7.8g / cm 3 , the coating has a fiber columnar growth structure, the boundary between two adjacent fiber columnar structures is dense, there is no penetrating void, and the width of columnar crystals is 60-80nm.
[0075] The prepared Fe-Cr-Al-Y protective coating is tested for ha...
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