Anti-oxidation and ablation-resistant coating on nickel-based alloy surface and preparation method thereof
A nickel-based alloy, anti-oxidation technology, applied in the field of high-temperature anti-oxidation coatings, to achieve excellent ablation resistance, easy to operate, and beneficial to the protection of the environment and construction personnel
Active Publication Date: 2019-01-08
CENT SOUTH UNIV
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Embodiment 1
[0036] step one
[0037] By mass percentage, SiO 2 45%, CaO 20%, Al 2 o 3 15%, BaO10%, B 2 o 3 5%, MgO 3%, Co 2 o 3 2%; the powders of each component are prepared separately, and then the powders are mixed evenly, melted at a high temperature of 1600 ℃, quenched and pulverized to obtain enamel glass frit, and the average particle size of enamel glass frit is 10 μm;
[0038] step two
[0039] According to the mass ratio, 90% of enamel glass material, 4% of clay, Cr 2 o 3 6%, with enamel frit, clay, Cr 2 o 3 , and then the prepared enamel frit, clay, Cr 2 o 3 After mixed ball milling, water-based slurry was prepared; the slurry was coated on the surface of the nickel-based alloy, dried and solidified at low temperature, and then the sample was fired at 1200°C for 30 minutes to obtain a high-temperature anti-oxidation enamel coating (coating thickness 32.8 Microns, see image 3 ). The resulting high-temperature oxidation-resistant enamel coating was After re...
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Abstract
The invention relates to an antioxidant ablation-resistant coating for nickel-based alloy materials and a method for preparing the antioxidant ablation-resistant coating, and belongs to the technical field of high-temperature antioxidant coatings. The antioxidant ablation-resistant coating for the nickel-based alloy materials comprises glass enamel. The method includes uniformly mixing MgO powder, CaO powder, SiO2 powder, Al2O3 powder, BaO powder, B2O3 powder and Co2O3 powder with certain proportions with one another to obtain mixtures; carrying out fusion sintering and water quenching on the mixtures at the high temperatures of 1300-1800 DEG C and then smashing the mixtures to obtain glass materials; mixing the glass materials, clay and Cr2O3 with one another according to certain proportions to obtain mixtures, carrying out ball-milling on the mixtures and then preparing water-based slurry; coating the slurry on the surfaces of nickel-based alloy and then drying and curing the slurry at the low temperatures; firing samples at the temperatures of 1000-1300 DEG C for 30-60 minutes to obtain the high-temperature antioxidant enamel coating. The antioxidant ablation-resistant coating and the method have the advantages that the method includes simple processes and is convenient to implement, the thickness of the antioxidant ablation-resistant coating can be controlled, and the antioxidant ablation-resistant coating can be firmly and uniformly combined with nickel-based alloy substrates, is excellent in antioxidant capacity and thermal shock resistance and can be industrially produced.
Description
technical field [0001] The invention relates to an oxidation-resistant and ablation-resistant coating on the surface of a nickel-based alloy and a preparation method thereof, belonging to the technical field of high-temperature oxidation-resistant coatings. technical background [0002] As the operating temperature of gas turbine engines continues to increase, superalloys must have excellent high-temperature mechanical properties, as well as good resistance to high-temperature oxidation and ablation. In order to improve the high-temperature strength of the alloy, solid-solution-strengthening alloying elements such as Mo, W, and V are generally added to the alloy to reduce alloying elements such as Cr and Al that can improve high-temperature corrosion resistance. Therefore, it is necessary to take into account both excellent high-temperature mechanical properties and Good hot corrosion resistance is more difficult. In the case of ensuring excellent mechanical properties, app...
Claims
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IPC IPC(8): C23D5/02C03C8/02C03C8/14
CPCC03C8/02C03C8/14C23D5/02
Inventor 古一曾凡浩夏长清
Owner CENT SOUTH UNIV