Novel platinum-iridium-based ultrahigh-temperature multi-component alloy bonding layer capable of being used at temperature of 1300 DEG C or above, and preparation method thereof
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A multi-element alloy and bonding layer technology, which is applied in metal material coating process, coating, melting spray plating, etc., can solve the problems such as the diffusion of ultra-high temperature alloy bonding layer materials, coatings and matrix elements.
Pending Publication Date: 2022-02-01
KUNMING UNIV OF SCI & TECH
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[0004] Therefore, the existing NiCoCrAl system superalloy bonding layer can only work below 1100 ° C, and the existing Pt-Al coating has good oxidation resistance in the environment above 1300 ° C, but the coating and the substrate Severe element diffusion easily occurs between them, that is, there is currently no ultra-high temperature alloy bonding layer material that matches the rare earth tannate ceramic layer
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Embodiment 1
[0037]A new type of platinum-iridium-based ultra-high temperature multi-component alloy bonding layer that can be used above 1300 ° C. The bonding layer includes the following elements, in terms of mass percentage: 9.2% Ir, 16.4% Al, 3.6% Cr, 3.5% Ru, 2.4% Hf, 8.1% Ni, 4.2% Co, the balance being Pt.
[0038] A method for preparing a novel platinum-iridium-based ultra-high temperature multi-component alloy bonding layer that can be used above 1300°C, specifically comprising the following steps:
[0039] S100. Selection and smelting of alloy components to obtain alloy ingots:
[0040] S110, weighing the raw material powder of the alloying elements according to the above mass ratio, and performing batching.
[0041] S120, pressing the homogeneously mixed raw material powder into a block, and pre-sintering at 950° C. for 2 hours in a hydrogen atmosphere.
[0042] S130, place the pre-fired sample in a vacuum arc melting furnace, and evacuate the furnace to 1×10 -6 Pa, then use t...
Embodiment 2
[0051] The difference between Example 2 and Example 1 is that the bonding layer includes the following elements, by mass percentage: 9.2% Ir, 16.4% Al, 3.6% Cr, 3.5% Ru, 2.4% Hf, 3.2% Zr, 8.1% Ni , 4.2% Co, 0.84% rare earth elements, and the balance is Pt.
Embodiment 3
[0053] The difference between Example 3 and Example 1 is that the bonding layer includes the following elements, in mass percentage: 9.2% Ir, 16.4% Al, 3.6% Cr, 3.5% Ru, 2.4% Hf, 3.2% Zr, 1.6% Ta , 8.1% Ni, 4.2% Co, 0.63% rare earth elements, and the balance is Pt.
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Abstract
The invention discloses a novel platinum-iridium-based ultrahigh-temperature multi-component alloy bonding layer capable of being used at a temperature of 1300 DEG C or above, and a preparation method thereof, and relates to the technical field of thermal barrier coatings. According to a technical scheme, the novel platinum-iridium-based ultrahigh-temperature multi-component alloy bonding layer is characterized by comprising, by mass, 6.8%-9.2% of Ir, 0.0%-21.0% of Al, 0.0%-6.0% of Cr, 0.0%-4.0% of Ru, 2.0%-4.0% of Hf, 0.0%-4.0% of Zr, 0.0%-3.0% of Ta, 0.0%-9.0% of Ni, 0.0%-5.0% of Co and 0.0%-1.0% of a rare earth element, with the balance being Pt, wherein the rare earth element is one or more selected from Y, Ce, La and Th. The novel platinum-iridium-based ultrahigh-temperature multi-component alloy bonding layer can be applied as a thermal barrier coating bonding layer for hot-end components in aerospace equipment, particularly to high-temperature components such as of blades, spray pipes, nozzles, throat liners and inner combustion chamber walls of various ultrahigh-temperature engines like aero-engines, rocket engines and large gas turbines, and can prolong the service life of the high-temperature components.
Description
technical field [0001] The invention relates to the technical field of thermal barrier coatings, more specifically, it relates to a novel platinum-iridium-based ultra-high temperature multi-element alloy bonding layer that can be used at temperatures above 1300°C and a preparation method thereof. Background technique [0002] Thermal barrier coating is the key thermal protection method for the hot end parts of Daguo heavy equipment. It is deposited on the surface of high temperature resistant metal or super alloy. The equipment is resistant to temperature when flying at the speed of sound, so that the device made of it can operate at a higher temperature, and can improve the thermal efficiency of the device to more than 60%, and can prolong the life of the blade. At present, the thermal barrier coatings in practical use are all double-layer structures: the surface layer is a ceramic layer, which mainly plays a role of heat insulation; the inner layer is a metal bonding layer...
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