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slurry coating superalloys


Superalloys are metal alloys that can operate at a high fraction of their melting point. Superalloys must have high strength, high melting points, resistance to corrosion or oxidation, and creep resistance. ... In short, thermal barrier coatings are a coating applied to superalloys that protect the superalloy from high temperatures. If the ...

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Slurry aluminide coatings have been well known for a number of years and are widely used to protect metallic surfaces from oxidation and corrosion. A variety of commercial slurries is available to aluminize the surfaces of nickel-based superalloys, however, they have several disadvantages.

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The U.S. Department of Energy's Office of Scientific and Technical Information

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DOI: 10.1080/10667857.1994.11785067 View full text | | Share

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A SLURRY COATING PARTICULARLY FOR THENICKLE-BASE AND COBALT-BASE ALLOYS, WHICH COMPRISES, BY WEIGHT, 20-30 PERCENT CHROMIUM, 8-12 PERCENT ALUMINUM, 10-16 PERCENT SILICON, 0.1-3 PERCENT YTTRIUM,...

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an experimental, low-cost, silicon slurry/aluminide high-temperature coating for superalloys A duplex silicon-slurry/aluminide coating has been developed and cyclically tested in Mach 1 combustion gases for oxidation and thermal fatigue resistance at 1093 C and in Mach 0.3 gases for hot-corrosion resistance at 900 C.

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A protective coating system is provided for nickel-base and cobalt-base superalloys which is capable of imparting oxidation and corrosion resistance at elevated temperatures. The superalloy body is first coated by physical vapor deposition with a composition consisting essentially of chromium, aluminum, a member selected from the group consisting of yttrium and the rare earth elements, and at ...

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Slurry Seal - Pavement Surface Treatment. Slurry seal is a cold mix paving system that can remedy a broad range of problems on streets, airfields, parking lots, and driveways. Think of Slurry Seal as an industrial-grade asphalt surfacing. The principal materials used to create slurry are aggregate, asphalt emulsion, and fillers which are ...

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Inorganic slurry coatings based on a ceramic binder which contains aluminum or aluminum and silicon are very effective coatings in engines and gas turbines. ... - Ceral 10 aluminide silicon doped for hot corrosion protection of turbine components made of superalloys. Coating structures and properties are discussed. Volume Subject Area ...

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In conclusion, the new ability to manufacture low-activity coatings by the slurry technique has to the potential to replace CVD coating of superalloys for many aeronautic applications in the future due to the straight-forward manufacturing in air and environmentally friendly processing.

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SermaLoy™ J diffused slurry aluminide coating has a unique silicon-enriched outer layer. It is effective in protecting gas turbine hot section components at temperatures up to 1835°F (1000°C). Advantages Benefits of SermaLoy J coating application service include: • Excellent resistance to both high- and low-temperature hot

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SLURRY-COAT provides a highly cost-effective solution for cracked & damaged asphalt. This includes lateral cracks, alligatored areas, divots and other surface damage. SLURRY-COAT fills Holes 2" deep and up to 3/8" thick surface (thickness varies depending on individual job requirements & conditions). For more technical information go to: FAQ.

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The oxidation resistance of the NiAl aluminized slurry coatings compared well with that of commercial aluminide coatings on both IN 100 and WI-52 superalloys. The slurry coatings remained intact after 300 hr of cyclic furnace testing at 1093' C. The NiAl aluminized slurry coating on IN 100 also survived burner rig testing for 300 hr at 1093' C.

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β phase as EQ coating [13, 14] with superalloys which are in equilibrium with β phase. Thus, improvement the oxidation property of γ' EQ coating for the advanced Ni-base superalloy is required. In this study, the compositions of γ' phase of Ni-base superalloys are modified to improve the oxidation resistance and

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When a superalloy's aluminum content is insufficient for preventing oxidation, a protective coating can be used to maintain service life by preventing selective oxidation at the grain boundaries and surface carbides, and by inhibiting internal oxidation. Chromium can sometimes decrease high-temperature mechanical strength, so many superalloys ...

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two-step coating process: slurry spraying followed by pack, aluminizing. The coated superalloys were cyclically furnace tested in, air, at, 1093' C for, 300, hr., Nickel-aluminide coatings...

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Fig. 3 displays the isothermal oxidation kinetic curves of the MoSi 2 coating with SiC-glass diffusion barrier at 1250 and 1400 °C for different time. At 1250 °C, the coating exhibits a mass loss process in the first 5 hours which should be attributed to the volatilization of gaseous MoO 3 and B 2 O 3.Once the silica covered the whole surface, the loss of those gaseous oxides were extremely ...

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DOI: 10.1016/J.SURFCOAT.2013.01.033 Corpus ID: 136881082; Low-activity aluminide coatings for superalloys using a slurry process free of halide activators and chromates @article{Montero2013LowactivityAC, title={Low-activity aluminide coatings for superalloys using a slurry process free of halide activators and chromates}, author={Xabier Montero and Mathias C. Galetz and Michael Sch{"u}tze ...

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In this study, reactive elements were incorporated into aluminizing packs and slurries and used to coat Ni-base superalloys. The characteristics of coatings applied by the pack and slurry processes, e.g., thickness, microhardness, microstructure and elemental distribution, were studied using a broad range of techniques, i.e., X-ray diffraction ...

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Corpus ID: 136947497; VACUUM PACK AND SLURRY COATING PROCESSES FOR COATING SUPERALLOYS. @inproceedings{Gadd1968VACUUMPA, title={VACUUM PACK AND SLURRY COATING PROCESSES FOR COATING SUPERALLOYS.}, author={J. D. Gadd and J. F. Nejedlik and L. D. Graham}, year={1968} }

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Materials Science, High-temperature coatings for superalloys can be divided into three categories: Two of them, diffusion and overlay coatings, are both used to protect a system from oxidation and corrosion. The third type, thermal barrier coatings, protects the substrate from thermal degradation.

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The coating material comprises at least one layer (3) which comprises hafnium and yttrium in addition to aluminium. A slurry composition for aluminising a superalloy component is provided, wherein...

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US-3741791-A chemical patent summary.

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Low-activity aluminide coatings for superalloys using a slurry process free of halide activators and chromates

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A slurry seal or slurry coat is meant to replace not only the binders within asphalt but the aggregates as well, filling in small gaps or cracks in worn asphalt to create a new, smoother, more even surface.

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A method for coating a nickel- or cobalt-based superalloy surface by slurry deposition/heat diffusion. The method includes preparing a slurry of a metal coating powder mixed into an adhesive carrier that will burn off ash-free during a diffusion cycle, depositing the slurry onto the surface of a Ni- or Co-based superalloy material to form a coated surface, and heating the coated surface to a ...

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the purpose of this investigation was twofold: (1)to determine the feasibility of depositing simple .05-to 0. 10-mm oxidation-resistant coatings on nickel- and cobalt- base superalloys using slurry techniques, and (2) to evaluate the oxidation resistance of the slurry-coated materials in comparison to that of similar coatings produced by clad …

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