CN105088123A - Thermal barrier coating containing antioxidant bonding layer and preparation method of thermal barrier coating - Google Patents
Thermal barrier coating containing antioxidant bonding layer and preparation method of thermal barrier coating Download PDFInfo
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- CN105088123A CN105088123A CN201510495109.1A CN201510495109A CN105088123A CN 105088123 A CN105088123 A CN 105088123A CN 201510495109 A CN201510495109 A CN 201510495109A CN 105088123 A CN105088123 A CN 105088123A
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- thermal barrier
- barrier coating
- coating containing
- tack coat
- bonding layer
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Abstract
The invention discloses a thermal barrier coating containing an antioxidant bonding layer. The thermal barrier coating containing the antioxidant bonding layer, compared with the traditional thermal barrier coating, has the advantages that the porosity of a ceramic phase can be improved after adding carbon powder and roasting and modifying at high temperature; some particles cannot be fully molten in plasma jet during spraying, the deformation of the particles is reduced when impacting a base body, and porous structures which are integrally lapped are easily formed, so that the insulation performance of the coating can be obviously improved. A modification method is carried out, wherein Zr<4+> is replaced by Y<3+> and Ce<4+> in a zirconium dioxide lattice; an oxygen vacancy and a local stress field are generated, thus the phonon scattering in the lattice can be improved, and the heat conductivity can be obviously reduced; in addition, the atomic weight of a solute atom Ce is far more than that of Y, so that the scattering strength of phonons in the thermal barrier coating can be obviously improved, and as a result, the heat conductivity can be reduced. According to the thermal barrier coating containing the antioxidant bonding layer and the preparation method, the preparation process is simple; the working temperature is high; the thermal barrier coating is outstanding in high-temperature oxidation resistance and long in service life.
Description
Technical field
The present invention relates to Machining of Ceramics technical field, be specifically related to a kind of thermal barrier coating containing anti-oxidant tack coat and preparation method thereof.
Background technology
Along with aero-gas turbine is to high flow capacity ratio, high thrust-weight ratio, high air inlet temperature future development, the working temperature in combustion chamber is considerably beyond the use temperature limit of Ni based high-temperature alloy.Prepare thermal barrier coating at superalloy matrix surface, holding warm ability to raising matrix has very directly effect, thus effectively improves the working temperature of part, increases the service life.
It is a kind ofly utilize the material that thermal conductivity is relatively low that thermal barrier coating leads to, and is coated on superalloy matrix surface thus plays the functional coating of heat-blocking action by suitable technology.Typical thermal barrier coating is made up of superalloy matrix, metal bonding coating and top heat insulating ceramic coat.Wherein, superalloy matrix mainly bears mechanical load; Tack coat mainly works to improve matrix and ceramic coating physical compatibility and antioxidant anticorrosive; Top ceramic layer Main Function is isolated heat and produces thermograde, and its heterogeneous microstructure plays a crucial role to the heat-proof quality of thermal barrier coating and work-ing life.But when thermal barrier coating is applied to the working temperature day by day increased, harsher Working environment will be faced, the obtained thermal barrier coating of prior art exist easily undergo phase transition, oxidation-resistance is low, intensity is little, poor high temperature stability, easily produce the defects such as high temperature corrosion, is difficult to meet the needs that turbine intake temperature improves further.Therefore, the focus that better heat-proof quality and good stability, elevated temperature corrosion resistant are excellent under the high temperature conditions novel heat barrier coat material become thermal barrier coating area research is in recent years found.
Summary of the invention
Object of the present invention is just to provide a kind of thermal barrier coating containing anti-oxidant tack coat and preparation method thereof, to overcome the deficiencies in the prior art.
The object of the present invention is achieved like this:
A kind of thermal barrier coating containing anti-oxidant tack coat, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 32-35, zirconium dioxide 25-27, yttrium oxide 31-34, carbon dust 7-9, nano titanium oxide 0.7-1.2, vanadium diboride 9-12, dammar gum 6-8, NiCoCrAlYTa alloy powder 62-65, graphite 13-15, Sodium phosphate dibasic 4-6.
The preparation method of described a kind of thermal barrier coating containing anti-oxidant tack coat, is characterized in that comprising the following steps:
(1) by nano titanium oxide, NiCoCrAlYTa alloy powder in 680-780 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add Sodium phosphate dibasic ultrasonic grinding 20-40 minute, be heated to melting, stir 5-8h, under vacuum atmosphere, condensation is shaping, obtained modified metal tack coat of pulverizing;
(2) join in ball mill by carbon dust, the dammar gum spraying into molten state is mixed thoroughly, adds vanadium diboride, carries out ball milling, mixes, breaks up obtained modification carbon dust under high temperature;
(3) by modification carbon dust, cerium oxide, zirconium dioxide, yttrium oxide through 1540-1660 DEG C of high-temperature calcination 2-4 hour, cooling adds other remaining component and is ground to 200-300 order, obtained modified ceramic powder;
(4) by superalloy matrix after ultrasonic oil removing, sandblasting pre-treatment, by electron thermal explosion method by step (1) material even application on superalloy matrix;
(5) finally by air plasma spraying method, the spraying current of 500A is adopted to be deposited on metal bonding coating by obtained for step (3) modified ceramic powder.
The present invention has following beneficial effect: the thermal barrier coating that the present invention obtains is compared with traditional thermal barrier coating, add carbon dust through the modified porosity improving ceramic phase of high-temperature calcination, and some particles melts insufficient in plasma jet in spraying process, when clashing into matrix, deformation extent is slightly weak, the vesicular structure that easy formation overlaps, the heat-proof quality of coating is significantly improved, and secondly the present invention is by method of modifying, Y in zirconium dioxide lattice
3+, Ce
4+replace Zr
4+create the stress field of Lacking oxygen and local, add the phon scattering in lattice, thermal conductivity obviously reduces, and the nucleidic mass of solid solution atom Ce is far longer than the nucleidic mass of Y, can significantly improve the scattering strength of the phonon in product of the present invention, thus reduce thermal conductivity, preparation technology of the present invention is simple, and working temperature is higher, has excellent high-temperature oxidation resistance and longer work-ing life.
Embodiment
Described a kind of thermal barrier coating containing anti-oxidant tack coat, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 33, zirconium dioxide 25, yttrium oxide 31, carbon dust 7, nano titanium oxide 0.7, vanadium diboride 12, dammar gum 6, NiCoCrAlYTa alloy powder 64, graphite 13, Sodium phosphate dibasic 6.
Making method comprises the following steps:
(1) by nano titanium oxide, NiCoCrAlYTa alloy powder in 680-780 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add Sodium phosphate dibasic ultrasonic grinding 20-40 minute, be heated to melting, stir 5-8h, under vacuum atmosphere, condensation is shaping, obtained modified metal tack coat of pulverizing;
(2) join in ball mill by carbon dust, the dammar gum spraying into molten state is mixed thoroughly, adds vanadium diboride, carries out ball milling, mixes, breaks up obtained modification carbon dust under high temperature;
(3) by modification carbon dust, cerium oxide, zirconium dioxide, yttrium oxide through 1540-1660 DEG C of high-temperature calcination 2-4 hour, cooling adds other remaining component and is ground to 200-300 order, obtained modified ceramic powder;
(4) by superalloy matrix after ultrasonic oil removing, sandblasting pre-treatment, by electron thermal explosion method by step (1) material even application on superalloy matrix;
(5) finally by air plasma spraying method, the spraying current of 500A is adopted to be deposited on metal bonding coating by obtained for step (3) modified ceramic powder.
The technical parameter index of the thermal barrier coating using the present invention to produce is as follows:
(1) coating porosity: 17.9%;
(2) record coating cross sections through metaloscope and have more closed hole and vertical micro--crack;
(3) temperature head by measuring coatingsurface and the sample back side calculates the heat-proof quality of coating, and increase rate has been up to about 51.3%.
Claims (4)
1. the thermal barrier coating containing anti-oxidant tack coat, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 32-35, zirconium dioxide 25-27, yttrium oxide 31-34, carbon dust 7-9, nano titanium oxide 0.7-1.2, vanadium diboride 9-12, dammar gum 6-8, NiCoCrAlYTa alloy powder 62-65, graphite 13-15, Sodium phosphate dibasic 4-6.
2. the making method of a kind of thermal barrier coating containing anti-oxidant tack coat according to claim 1, is characterized in that comprising the following steps:
(1) by nano titanium oxide, NiCoCrAlYTa alloy powder in 680-780 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add Sodium phosphate dibasic ultrasonic grinding 20-40 minute, be heated to melting, stir 5-8h, under vacuum atmosphere, condensation is shaping, obtained modified metal tack coat of pulverizing;
(2) join in ball mill by carbon dust, the dammar gum spraying into molten state is mixed thoroughly, adds vanadium diboride, carries out ball milling, mixes, breaks up obtained modification carbon dust under high temperature;
(3) by modification carbon dust, cerium oxide, zirconium dioxide, yttrium oxide through 1540-1660 DEG C of high-temperature calcination 2-4 hour, cooling adds other remaining component and is ground to 200-300 order, obtained modified ceramic powder;
(4) by superalloy matrix after ultrasonic oil removing, sandblasting pre-treatment, by electron thermal explosion method by step (1) material even application on superalloy matrix;
(5) finally by air plasma spraying method, the spraying current of 500A is adopted to be deposited on metal bonding coating by obtained for step (3) modified ceramic powder.
3. the making method of a kind of thermal barrier coating containing anti-oxidant tack coat according to claim 2, it is characterized in that, described metal bonding coating coating thickness is 100 μm, and ceramic layer coats thickness is 300 μm.
4. the making method of a kind of thermal barrier coating containing anti-oxidant tack coat according to claim 2, it is characterized in that, described superalloy matrix is K4169 superalloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495109.1A CN105088123A (en) | 2015-08-13 | 2015-08-13 | Thermal barrier coating containing antioxidant bonding layer and preparation method of thermal barrier coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495109.1A CN105088123A (en) | 2015-08-13 | 2015-08-13 | Thermal barrier coating containing antioxidant bonding layer and preparation method of thermal barrier coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105088123A true CN105088123A (en) | 2015-11-25 |
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Family Applications (1)
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| CN201510495109.1A Pending CN105088123A (en) | 2015-08-13 | 2015-08-13 | Thermal barrier coating containing antioxidant bonding layer and preparation method of thermal barrier coating |
Country Status (1)
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|---|---|
| CN (1) | CN105088123A (en) |
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2015
- 2015-08-13 CN CN201510495109.1A patent/CN105088123A/en active Pending
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Application publication date: 20151125 |
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