Nanometer crystalline compound coating and its prepn process
A nanocrystalline composite and nanocrystalline technology, applied in the field of material science, can solve the problems of short coating life and high preparation cost, achieve good high temperature and thermal corrosion resistance, avoid interdiffusion, and ensure quality and service life.
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Embodiment 1
[0033] Sample cast state M17, size is 20mm * 10mm * 3mm, use HVOF (hypersonic flame spraying) method to make a layer of CoNiCrAlY (21wt%Ni, 38wt%Cr, 8wt%Al, 0.5wt%Y, Co 1) The thickness is 20 μm; then, a 10 μm thick nanocrystalline CoNiCrAlY layer with the same composition is prepared on the surface of the CoNiCrAlY layer by sputtering, the coating surface is flat and the structure is dense. High temperature and NaCl corrosion resistance are shown in Table 2 and Table 3.
Embodiment 2
[0035] Sample cast state M17, size is 20mm * 10mm * 3mm, use HVOF (hypersonic flame spraying) method to make a layer of CoNiCrAlY (21wt%Ni, 38wt%Cr, 8wt%Al, 0.5wt%Y, Co I) thickness is 20 μm; then, a 10 μm thick nanocrystalline CoNiCrAlY layer with the same composition is prepared on the surface of the CoNiCrAlY layer by arc plating, the coating surface is smooth and the structure is dense. High temperature and NaCl corrosion resistance are shown in Table 2 and Table 3.
Embodiment 3
[0037] Sample cast state M17, size is 20mm * 10mm * 3mm, use HVOF (hypersonic flame spraying) method to make a layer of CoNiCrAlY (21wt%Ni, 38wt%Cr, 8wt%Al, 0.5wt%Y, Co I) the thickness is 20 μm; then, a 10 μm thick nanocrystalline CoNiCrAlY layer with the same composition is prepared on the surface of the CoNiCrAlY layer by EB-PVD (Electron Beam Physical Vapor Deposition), the coating surface is smooth and the structure is dense. High temperature and NaCl corrosion resistance are shown in Table 2 and Table 3.
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