CN105112839A - Thermal barrier coating with good light resistance and thermal shock resistance and manufacturing method for thermal barrier coating - Google Patents
Thermal barrier coating with good light resistance and thermal shock resistance and manufacturing method for thermal barrier coating Download PDFInfo
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- CN105112839A CN105112839A CN201510495053.XA CN201510495053A CN105112839A CN 105112839 A CN105112839 A CN 105112839A CN 201510495053 A CN201510495053 A CN 201510495053A CN 105112839 A CN105112839 A CN 105112839A
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- barrier coating
- thermal barrier
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Abstract
The invention discloses a thermal barrier coating with good light resistance and thermal shock resistance. After added aluminum powder is roasted and modified at a high temperature, oxidation resistance of a ceramic phase and permeability of matrix metal can be improved; in a spraying process, part of particles are molten insufficiently in plasma jet flow, are slightly weak in deformation degree while hitting against the matrix, and are liable to form a porous structure which is lapped together, thereby improving heat insulation property of the coating; secondly, by virtue of a modification method, Y<3+> and Ce<4+> in a zirconium dioxide crystal lattice substitute Zr<4+>, so that oxygen vacancy and local stress field are generated, phonon scattering in the crystal lattice is increased, and thermal conductivity is obviously reduced; moreover, atomic weight of a solute atom Ce is much larger than that of Y, so that scattering intensity of phonons in a product disclosed by the invention can be remarkably improved, thereby reducing the thermal conductivity; and the prepared coating is high in surface hardness, good in toughness, not liable to crack and layer, has the characteristics of good light resistance, good thermal shock resistance and the like, and has a wider application.
Description
Technical field
The present invention relates to Machining of Ceramics technical field, be specifically related to thermal barrier coating of the good heat shock resistance of a kind of photostabilization 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 thermal barrier coating of the good heat shock resistance of a kind of photostabilization and preparation method thereof, to overcome the deficiencies in the prior art.
The object of the present invention is achieved like this:
The thermal barrier coating of the good heat shock resistance of a kind of photostabilization, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 24-26, zirconium dioxide 33-35, yttrium oxide 20-23, nanometer silicon carbide 1.3-1.7, aluminium powder 5-8, aluminium nitride 10-13, NiCoCrAlYTa alloy powder 75-80, zinc borate 1-2, polyvinyl alcohol fiber 3-5, mullite 20-24, coal tar 4-6.
The preparation method of the thermal barrier coating of the good heat shock resistance of described a kind of photostabilization, is characterized in that comprising the following steps:
(1) by nanometer silicon carbide, NiCoCrAlYTa alloy powder in 660-760 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add zinc borate 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) aluminium powder, polyvinyl alcohol fiber are joined grinding in ball grinder 20-30 minute, spray into coal tar and mix thoroughly, carry out ball milling under normal temperature, mix, break up, dry obtained modified aluminium powder;
(3) by modified aluminium powder, cerium oxide, zirconium dioxide, yttrium oxide through 1535-1640 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 aluminium powder and improve the antioxidant property of ceramic phase and the perviousness with matrix metal through high-temperature calcination is modified, 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, improve the thermal insulation of coating, 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, coatingsurface hardness prepared by the present invention is high, good toughness is not easy to crack, layering, has the features such as fast light, thermal-shock resistance is good, therefore has and apply widely.
Embodiment
The thermal barrier coating of the good heat shock resistance of described a kind of photostabilization, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 24, zirconium dioxide 35, yttrium oxide 21, nanometer silicon carbide 1.3, aluminium powder 8, aluminium nitride 12, NiCoCrAlYTa alloy powder 75, zinc borate 1, polyvinyl alcohol fiber 5, mullite 23, coal tar 6.
Making method comprises the following steps:
(1) by nanometer silicon carbide, NiCoCrAlYTa alloy powder in 660-760 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add zinc borate 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) aluminium powder, polyvinyl alcohol fiber are joined grinding in ball grinder 20-30 minute, spray into coal tar and mix thoroughly, carry out ball milling under normal temperature, mix, break up, dry obtained modified aluminium powder;
(3) by modified aluminium powder, cerium oxide, zirconium dioxide, yttrium oxide through 1535-1640 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: 16.75%;
(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 49.47%.
Claims (4)
1. the thermal barrier coating of the good heat shock resistance of photostabilization, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 24-26, zirconium dioxide 33-35, yttrium oxide 20-23, nanometer silicon carbide 1.3-1.7, aluminium powder 5-8, aluminium nitride 10-13, NiCoCrAlYTa alloy powder 75-80, zinc borate 1-2, polyvinyl alcohol fiber 3-5, mullite 20-24, coal tar 4-6.
2. the making method of the thermal barrier coating of the good heat shock resistance of a kind of photostabilization according to claim 1, is characterized in that comprising the following steps:
(1) by nanometer silicon carbide, NiCoCrAlYTa alloy powder in 660-760 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add zinc borate 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) aluminium powder, polyvinyl alcohol fiber are joined grinding in ball grinder 20-30 minute, spray into coal tar and mix thoroughly, carry out ball milling under normal temperature, mix, break up, dry obtained modified aluminium powder;
(3) by modified aluminium powder, cerium oxide, zirconium dioxide, yttrium oxide through 1535-1640 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 the thermal barrier coating of the good heat shock resistance of a kind of photostabilization according to claim 2, 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 the thermal barrier coating of the good heat shock resistance of a kind of photostabilization according to claim 2, is characterized in that, described superalloy matrix is K4169 superalloy.
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| CN201510495053.XA CN105112839A (en) | 2015-08-13 | 2015-08-13 | Thermal barrier coating with good light resistance and thermal shock resistance and manufacturing method for thermal barrier coating |
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| CN201510495053.XA CN105112839A (en) | 2015-08-13 | 2015-08-13 | Thermal barrier coating with good light resistance and thermal shock resistance and manufacturing method for thermal barrier coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437892A (en) * | 2018-11-27 | 2019-03-08 | 陈涛 | A kind of zirconia ceramics coating and preparation method thereof |
| CN112176275A (en) * | 2020-10-26 | 2021-01-05 | 中国人民解放军陆军装甲兵学院 | Thermal barrier coating and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351545A (en) * | 2011-04-07 | 2012-02-15 | 世林（漯河）冶金设备有限公司 | High temperature heat barrier material, coating, molded product and application thereof |
| CN103668191A (en) * | 2013-12-09 | 2014-03-26 | 广州有色金属研究院 | Preparation method for thermal-barrier coating |
-
2015
- 2015-08-13 CN CN201510495053.XA patent/CN105112839A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351545A (en) * | 2011-04-07 | 2012-02-15 | 世林（漯河）冶金设备有限公司 | High temperature heat barrier material, coating, molded product and application thereof |
| CN103668191A (en) * | 2013-12-09 | 2014-03-26 | 广州有色金属研究院 | Preparation method for thermal-barrier coating |
Non-Patent Citations (1)
| Title |
|---|
| 吴子健 等编著: "《热喷涂技术与应用》", 31 January 2006 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437892A (en) * | 2018-11-27 | 2019-03-08 | 陈涛 | A kind of zirconia ceramics coating and preparation method thereof |
| CN112176275A (en) * | 2020-10-26 | 2021-01-05 | 中国人民解放军陆军装甲兵学院 | Thermal barrier coating and preparation method and application thereof |
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Application publication date: 20151202 |
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