Method for preparing thermal barrier coatings of high-temperature structural material
A technology of structural materials and thermal barrier layers, applied in metal material coating process, superimposed layer plating, coating, etc., can solve the problems that it is difficult to meet high temperature strength and high temperature oxidation resistance at the same time, and achieve the goal of reducing shedding failure Possibility, reduction of mismatch stress, effect of long service life
Inactive Publication Date: 2008-12-31
PEKING UNIV
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Problems solved by technology
At such a high temperature, existing high-temperature structural materials (such as Fe-based, Ni-based, Co-based, Ti-based, Nb-based, W-based, Ta-based superalloys, or superalloys and intermetallic compounds) have been difficult to simultaneously Meet the two requirements of high temperature strength and high temperature oxidation resistance
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[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0019] The high-temperature structural material 1 is IC6 alloy, the anti-oxidation bonding layer 2 is NiCoCrAlY alloy, and the heat-insulating ceramic layer 3 is 6% to 8% (mass percentage) Y 3 o 2 Partially stabilized ZrO 2 (abbreviated as Y-PSZ or YSZ).
[0020] With reference to the accompanying drawings, the present invention first uses EB-PVD (Electron Beam Physical Vapor Deposition) to prepare an oxidation-resistant bonding layer 2 on a substrate of a high-temperature structural material 1, and the coating should cover the entire surface as much as possible.
[0021] Next, a thin heat-insulating ceramic layer 3 is plated with EB-PVD on the anti-oxidation bonding layer 2; the thickness of the thin heat-insulating ceramic layer is 1 μm to 10 μm, and it should cover the entire surface as much as possible.
[0022] Subsequently, the above-me...
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Abstract
The invention discloses a process for preparing a thermal barrier layer of a high temperature structural material. The process comprises the steps of: firstly, plating or coating an anti-oxidation bonding layer on the high temperature structural material; secondly, plating or coating a heat insulation ceramic layer on an anti-oxidation bonding layer; thirdly, using intense pulsed ion beams to irradiate the surface of the material so as to make the heat insulation ceramic layer melt and mix with the anti-oxidation bonding layer to form a transition layer; and finally plating or coating a heat insulation ceramic layer again to obtain the thermal barrier layer of the high temperature structural material. Because the transition layer is formed between the anti-oxidation bonding layer and the heat insulation ceramic layer, the mismatch stress between the two layers is reduced, and the service life of the thermal barrier layer is extended.
Description
technical field [0001] The invention relates to a high-temperature treatment technology for alloy materials, in particular to a method for preparing a thermal barrier layer of a high-temperature structural material. Background technique [0002] High-temperature structural materials are widely used as structural materials for turbine engine combustion chambers in aircraft, ships, automobiles, high-temperature boiler high-temperature combustion chambers, and other high-temperature work areas. They must work in harsh environments with high temperatures above 1000°C and oxidation and corrosion. . At such a high temperature, existing high-temperature structural materials (such as Fe-based, Ni-based, Co-based, Ti-based, Nb-based, W-based, Ta-based superalloys, or superalloys and intermetallic compounds) have been difficult to simultaneously It meets the two requirements of high temperature strength and high temperature oxidation resistance. At present, the method of surface coa...
Claims
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IPC IPC(8): C23C28/00
CPCY02T50/60
Inventor 颜莎尚怡君赵渭江
Owner PEKING UNIV