CN105112838A - Thermal barrier coating with low oxygen transmission rate and manufacturing method thereof - Google Patents

Thermal barrier coating with low oxygen transmission rate and manufacturing method thereof Download PDF

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Publication number
CN105112838A
CN105112838A CN201510495049.3A CN201510495049A CN105112838A CN 105112838 A CN105112838 A CN 105112838A CN 201510495049 A CN201510495049 A CN 201510495049A CN 105112838 A CN105112838 A CN 105112838A
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CN
China
Prior art keywords
thermal barrier
barrier coating
transmission rate
oxygen transmission
low oxygen
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Pending
Application number
CN201510495049.3A
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Chinese (zh)
Inventor
陈玉峰
陈坦和
陈旭东
陈明祥
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Landtek Re-Manufacturing Technology Co Ltd Of Ma'an Mountain
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Landtek Re-Manufacturing Technology Co Ltd Of Ma'an Mountain
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Application filed by Landtek Re-Manufacturing Technology Co Ltd Of Ma'an Mountain filed Critical Landtek Re-Manufacturing Technology Co Ltd Of Ma'an Mountain
Priority to CN201510495049.3A priority Critical patent/CN105112838A/en
Publication of CN105112838A publication Critical patent/CN105112838A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a thermal barrier coating with low oxygen transmission rate. The thermal barrier coating is that aluminum powder is added and roasted at high temperature to modify, so as to improve the oxidation resistance of ceramic phase and the permeability of base metal; 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 improved. A modification method is carried out, wherein Zr<4+> is replaced by Y<3+> and Ce<4+> in a zirconium dioxide lattice, and an oxygen vacancy and a local stress field are generated, so that 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, thus the scattering strength of phonons in the thermal barrier coating can be obviously improved, and as a result, the heat conductivity can be reduced. The thermal barrier coating manufactured by the method has the characteristics of being low in oxygen transmission rate, outstanding in heat insulation, and long in service life, and the requirements such as long-term service and resistance to high-temperature oxidation of components at hot ends can be met.

Description

A kind of low oxygen transmission rate thermal barrier coating and preparation method thereof
Technical field
The present invention relates to Machining of Ceramics technical field, be specifically related to a kind of low oxygen transmission rate thermal barrier coating 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 low oxygen transmission rate thermal barrier coating 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 low oxygen transmission rate thermal barrier coating, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 31-33, zirconium dioxide 20-22, yttrium oxide 25-27, nano silicon 2-3, aluminium powder 6-8, antimony peroxide 15-17, NiCoCrAlYTa alloy powder 60-70, oyster shell whiting 23-25, benzene emulsion 4-6, zinc phosphate 1-2, calcium carbonate fiber 3-5.
The preparation method of described a kind of low oxygen transmission rate thermal barrier coating, is characterized in that comprising the following steps:
(1) by nano silicon, NiCoCrAlYTa alloy powder in 760-830 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add zinc phosphate 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, calcium carbonate fiber are joined grinding in ball grinder 10-15 minute, spray into benzene emulsion 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 1546-1650 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, coating prepared by the present invention has the features such as lower oxygen transmission rate, thermal insulation are good, long service life, can meet the requirements such as hot-end component long service and resistance to high temperature oxidation.
Embodiment
The low oxygen transmission rate thermal barrier coating of described one, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 31, zirconium dioxide 22, yttrium oxide 25, nano silicon 3, aluminium powder 8, antimony peroxide 15, NiCoCrAlYTa alloy powder 68, oyster shell whiting 23, benzene emulsion 4, zinc phosphate 1, calcium carbonate fiber 3.
Making method comprises the following steps:
(1) by nano silicon, NiCoCrAlYTa alloy powder in 760-830 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add zinc phosphate 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, calcium carbonate fiber are joined grinding in ball grinder 10-15 minute, spray into benzene emulsion 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 1546-1650 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: 17.6%;
(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 51.6%.

Claims (4)

1. one kind low oxygen transmission rate thermal barrier coating, it is characterized in that, be made up of the raw material of following weight part: cerium oxide 31-33, zirconium dioxide 20-22, yttrium oxide 25-27, nano silicon 2-3, aluminium powder 6-8, antimony peroxide 15-17, NiCoCrAlYTa alloy powder 60-70, oyster shell whiting 23-25, benzene emulsion 4-6, zinc phosphate 1-2, calcium carbonate fiber 3-5.
2. the making method of a kind of low oxygen transmission rate thermal barrier coating according to claim 1, is characterized in that comprising the following steps:
(1) by nano silicon, NiCoCrAlYTa alloy powder in 760-830 DEG C of pyroprocessing 30-50 minute, be cooled to room temperature rapidly, add zinc phosphate 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, calcium carbonate fiber are joined grinding in ball grinder 10-15 minute, spray into benzene emulsion 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 1546-1650 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 low oxygen transmission rate thermal barrier coating 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 low oxygen transmission rate thermal barrier coating according to claim 2, it is characterized in that, described superalloy matrix is K4169 superalloy.
CN201510495049.3A 2015-08-13 2015-08-13 Thermal barrier coating with low oxygen transmission rate and manufacturing method thereof Pending CN105112838A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201510495049.3A CN105112838A (en) 2015-08-13 2015-08-13 Thermal barrier coating with low oxygen transmission rate and manufacturing method thereof

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CN105112838A true CN105112838A (en) 2015-12-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042951A (en) * 1988-09-20 1990-06-13 萨尔泽血浆技术有限公司 Improved abradable coating and manufacture method thereof
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042951A (en) * 1988-09-20 1990-06-13 萨尔泽血浆技术有限公司 Improved abradable coating and manufacture method thereof
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)

* Cited by examiner, † Cited by third party
Title
吴子健 等编著: "《热喷涂技术与应用》", 31 January 2006 *

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