CN102925841A - Ceramic thermal barrier coating with allitic diffusion layer bonding layer and preparation method thereof - Google Patents
Ceramic thermal barrier coating with allitic diffusion layer bonding layer and preparation method thereof Download PDFInfo
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- CN102925841A CN102925841A CN2012104441659A CN201210444165A CN102925841A CN 102925841 A CN102925841 A CN 102925841A CN 2012104441659 A CN2012104441659 A CN 2012104441659A CN 201210444165 A CN201210444165 A CN 201210444165A CN 102925841 A CN102925841 A CN 102925841A
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Abstract
The invention relates to a ceramic thermal barrier coating with an allitic diffusion layer bonding layer and a preparation method thereof. An allitic diffusion layer is arranged between a base body and a main bonding layer. Three layers of ceramic thermal barrier coatings of the allitic diffusion layer, the main bonding layer and a ceramic layer are sequentially arranged on the base body. The corresponding thicknesses of the e allitic diffusion layer, the main bonding layer and the ceramic layer are sequentially 20-60mum, 100-150mum and 250-500mum. The allitic diffusion layer is deposited on the surface of the base body through a supersonic speed flame spraying method, the main bonding layer is deposited on the surface of the allitic diffusion layer through a supersonic speed flame or plasma spraying method, and the general ceramic layer is deposited on the main bonding layer through the plasma spraying method to obtain the ceramic thermal barrier coating with the allitic diffusion layer bonding layer. The thermal barrier coating can provide sufficient aluminum element for thermally grown oxide in deficient aluminum period in a late growth stage, reduces growth of spinel structure matters, improves heat shock resistance and prolongs service life.
Description
Technical field
The invention belongs to the coat preparing technology field, particularly relate to a kind of ceramic heat-barrier coating and preparation method with rich aluminium diffusion layer tack coat, by improving the tack coat later stage for the Al situation, improve the thermal-shock resistance of thermal barrier coating, prolong its work-ing life.
Background technology
Progress along with aeronautical and space technology, aero-gas turbine is towards high flow capacity ratio, high thrust-weight ratio and high turbine intake temperature future development, but along with improving constantly of fuel gas temperature and gaseous-pressure, the hot-end component service temperature is up to 1500 ℃, considerably beyond the military service limit of superalloy, development and the application of numbers of hot-side engine part temperatures technology have been promoted thus to reduce.Except improving cooling technology, be one of important means at superalloy hot-end component surface preparation thermal barrier coating.
Ceramic thermal barrier coating system generally adopts bilayer structure, and its mesexine is ceramic layer, adopts by the stable zirconium of yttrium more, and this layer at high temperature stability better mainly plays heat-blocking action; It is tack coat between ceramic layer and the matrix, this layer adopts the MCrAlY material usually at present, wherein M comprises nickel, cobalt, iron or at least a in the combination wherein, Cr is chromium, Al is aluminium, and Y is yttrium, and its function is the heat coupling of improving between matrix and the ceramic layer, and forms thermal growth oxide layer (TGO:Thermally Grown Oxides) in the high-temperature service process between tack coat and ceramic layer.TGO can prevent tack coat oxidation corrosion, directly affects the life-span of thermal barrier coating.For many years research finds, the inefficacy of thermal barrier coating focuses mostly in the TGO place, along with its continuous growth, neighbouringly will form poor aluminium district, thereby cause this zone Ni, the element selective oxidations such as Co, Al among the oxide compound of formation and the TGO
2O
3Reacting generates spinel structure material (Spinel), can affect the continuity of oxide film, consumes alloying element, accelerates the degeneration of coating, finally causes coating to lose efficacy.
In order to address the above problem, we propose a kind of novel thermal barrier coating system by improving the aluminium element flooding mechanism, increase oxidation later stage tack coat for Al, and then intervene the growth of TGO, work-ing life that can the Effective Raise thermal barrier coating.
Summary of the invention
The object of the invention is to overcome the prior art deficiency, by depositing in advance rich aluminium diffusion layer 3, improve the Al that supplies of oxidation later stage master bond layer, reduce near the formation of TGO layer 5 spinel structure material, improve the thermal-shock resistance of thermal barrier coating, prolong its work-ing life.
Technical scheme of the present invention is as follows:
A kind of ceramic heat-barrier coating with rich aluminium diffusion layer tack coat, it arranges the rich Al diffusion layer 3 of one deck between matrix 4 and master bond layer 2.
Ceramic heat-barrier coating of the present invention, the porcelain thermal barrier coating on the matrix is three layers, is followed successively by rich aluminium diffusion layer 3, master bond layer 2 and ceramic coating 1; Corresponding thickness is followed successively by 20～60 μ m, 100～150 μ m and 250～500 μ m.
Preparation method with ceramic heat-barrier coating of rich aluminium diffusion layer tack coat of the present invention, step is as follows:
1) matrix 4 surfaces is cleaned and sandblasting;
2) adopt supersonic flame spraying method to deposit rich aluminium diffusion layer 3 at matrix surface;
3) adopt supersonic flame or plasma spraying method at rich aluminium diffusion layer 3 surfaces deposition master bond layer 2;
4) adopt plasma spraying method deposited ceramic layer 1 on the master bond layer, obtain to have the ceramic heat-barrier coating of rich aluminium diffusion layer tack coat.
Described step 2) be used for depositing the particle selection Ni20Al material of rich aluminium diffusion layer 3 in, wherein Ni is nickel, and Al is aluminium, average particle size distribution is 45～125 μ m, the supersonic spray coating method of employing, spray power 20～50kW, spraying current 400～800A, powder feeding gas are N
2, gaseous tension 0.6MPa, spray distance 80～180mm, coat-thickness are 20～60 μ m.
The powder that is used for deposition master bond layer 2 in the described step 3) can be selected the MCrAlY material, wherein M comprises nickel, cobalt, iron is at least a or combination wherein, Cr is chromium, Al is aluminium, and Y is yttrium, its average particle size distribution scope is 10～100 μ m,, the deposition method that adopts is hypersonic flame spraying or plasma spraying method.
Thermal barrier coating system of the present invention is to spray in advance rich aluminium diffusion layer 3 on matrix 4, consist of the ceramic thermal barrier coating system with rich aluminium diffusion layer tack coat with master bond layer 2 and ceramic layer 1, can provide sufficient Al for the growth of TGO in the oxidation later stage, reduce the generation of spinel.The invention belongs to the coat preparing technology field, particularly relate to a kind of ceramic heat-barrier coating and preparation method with rich aluminium diffusion layer tack coat of preparation, improve the tack coat later stage for the Al situation, improve the thermal-shock resistance of thermal barrier coating and prolong its work-ing life.
Description of drawings
Fig. 1 is a kind of schematic diagram with ceramic heat-barrier coating of rich aluminium diffusion layer tack coat of the present invention;
The spread condition of the Al at initial stage under arms that Fig. 2 a is classical ceramic thermal barrier coating system;
The spread condition of the Al at initial stage under arms that Fig. 2 b is ceramic thermal barrier coating system of the present invention;
The spread condition of the Al in later stage under arms that Fig. 3 a is classical ceramic thermal barrier coating system;
The spread condition of the Al in later stage under arms that Fig. 3 b is ceramic thermal barrier coating system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
Embodiment 1:
Referring to Fig. 1, adopt nickel base superalloy as matrix 4, the sandblast roughening treatment is carried out with corundum gravel in matrix to be sprayed 4 surfaces, remove zone of oxidation and the foreign material on surface, activation and coarse surface.Select Ni20Al as the material of rich aluminium diffusion layer 3, utilize supersonic flame spraying method to prepare rich aluminium diffusion layer 3, spray power 20～50kW, spraying current 400～800A, powder feeding gas are N
2, gaseous tension 0.6MPa, spray distance 100mm, coat-thickness are 20 μ m.Select CoNiCrAlY as the material of master bond layer 2, its composition and mass percent are that Ni is 32%, Cr is 21%, Al is 8%, Y is 0.5%, surplus is Co, utilizes supersonic flame spraying method at rich aluminium diffusion layer 3 surfaces preparation master bond layer 2, and coat-thickness is 130 μ m.Select at last 8YSZ as the material of ceramic layer 1, mass percent is Y
2O
3Be 8%, surplus is ZrO
2, adopt plasma spraying method at master bond layer 2 surface preparation ceramic layer 1, thickness is 300 μ m.
Embodiment 2:
The present embodiment adopts the method identical with embodiment 1, and the spray distance for preparing rich aluminium diffusion layer 3 is 180mm, and the thickness of rich aluminium diffusion layer 3 is 60 μ m, and the thickness of master bond layer 2 is 100 μ m, and the thickness of ceramic layer 1 is 300 μ m, and all the other steps are with example 1.
Embodiment 3:
The spray distance that the present embodiment prepares rich aluminium diffusion layer 3 is 80mm, and the thickness of rich aluminium diffusion layer 3 is 40 μ m.Select NiCrAlY as the material of master bond layer 2, its composition and mass percent are that Cr is 22%, Al is 10%, Y is 1%, and surplus is Ni, utilizes plasma spraying method at rich aluminium diffusion layer 3 surfaces preparation master bond layer 2, and coat-thickness is 120 μ m.The thickness of ceramic layer 1 is 400 μ m, and all the other steps are with example 1.
Contrast new thermal barrier coating system and classical thermal barrier coating system, shown in accompanying drawing 2,3.Fig. 2 a, what b represented is the situation of oxidation initial stage two kinds of ceramic heat-barrier coating systems Al diffusion, be on active service the initial stage at ceramic heat-barrier coating, in the classical ceramic thermal barrier coating system, shown in Fig. 2 a, the Ni because Al compares, Cr, the oxidation potential energy of Co is minimum, and at master bond layer 2 and ceramic layer 1 interface formation TGO layer 5, Al just forms certain concentration gradient with tack coat inside like this, master bond layer 2 inner Al will spread to the top layer, simultaneously, because also there are the concentration gradient of Al in master bond layer 2 and matrix 4, therefore Al spreads to both direction simultaneously in the master bond layer 2; And have in the ceramic heat-barrier coating of rich aluminium diffusion layer, shown in Fig. 2 b, same reason, upwards diffusion supply TGO layer 10 growth of Al in the master bond layer 2, but because the existence of rich aluminium diffusion layer 3, reduce the concentration gradient of Al between master bond layer 2 and the matrix 4, be conducive to postpone the time that poor aluminium district 7 occurs in the master bond floor 2.Fig. 3 a, what b represented is the situation of oxidation later stage two kinds of ceramic heat-barrier coating systems Al diffusion, in the thermal barrier coating service later stage, in the classical ceramic thermal barrier coating system, shown in Fig. 3 a, the in time growth of Enough supply TGO layer 5 of Al in the master bond layer 2, cause TGO floor 5 below poor aluminium district 7 to occur, Ni, Cr, Co just obtain the preferential oxidation gesture, form oxide compound, so with the Al that has generated
2O
3Reaction generates spinel structure material Ni (Cr, Al)
2O
4Layer 6 affect the continuity of oxide film, consumes alloying element, accelerates the degeneration of coating, finally causes the coating inefficacy; And have in the ceramic heat-barrier coating of rich aluminium diffusion layer tack coat, shown in Fig. 3 b, because the existence of rich aluminium diffusion layer 3, the content of Al is sufficient in the master bond layer 2, and the growth that this moment still can Enough supply TGO layer 5 guarantees that TGO layer 5 main component are Al
2O
3, do not generate or generate less the spinel structure material, the time retardation that poor aluminium district is occurred, thus prolong coating work-ing life.
Because of the present invention have the ceramic thermal barrier coating system of rich aluminium diffusion layer tack coat in the oxidation later stage, rich aluminium diffusion layer 3 can provide more Al to supply with the growth of TGO, postpone the time that poor aluminium district 7 forms, reduce as far as possible the interfacial failure of ceramic layer 1 that the Fast Growth of TGO spinel causes and master bond interlayer 2.
Although the above describes in detail preferred embodiment of the present invention by reference to the accompanying drawings, the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive.Those of ordinary skill in the art within not breaking away from the scope that aim of the present invention and claim protect, can change the thickness of rich aluminium diffusion layer and master bond layer under enlightenment of the present invention, material component also can change arbitrarily.These are all within protection of the present invention.
Claims (5)
1. have the ceramic heat-barrier coating of rich aluminium diffusion layer tack coat, it is characterized in that: the rich aluminium diffusion layer of one deck is set between matrix and master bond layer.
2. ceramic heat-barrier coating as claimed in claim 1 is characterized in that the porcelain thermal barrier coating on the matrix is three layers, is followed successively by rich aluminium diffusion layer, master bond layer and ceramic layer; Corresponding thickness is followed successively by 20～60 μ m, 100～150 μ m and 250～500 μ m.
3. the preparation method of the ceramic heat-barrier coating with rich aluminium diffusion layer tack coat of claim 2 is characterized in that step is as follows:
1) matrix surface is cleaned and sandblasting;
2) adopt supersonic flame spraying method to deposit rich aluminium diffusion layer at matrix surface;
3) adopt supersonic flame or plasma spraying method at rich aluminium diffusion layer surface deposition master bond layer;
4) adopt plasma spraying method at the conventional ceramic layer of master bond layer deposition, obtain to have the ceramic heat-barrier coating of rich aluminium diffusion layer tack coat.
4. method as claimed in claim 3 is characterized in that described step 2) in be used for depositing rich aluminium diffusion layer powder select the Ni20Al material, its average particle size distribution is 45～125 μ m, the supersonic spray coating method that adopts, spray power 20～50kW, spraying current 400～800A, powder feeding gas are N
2, gaseous tension 0.6MPa, spray distance 80～180mm, coat-thickness are 20～60 μ m.
5. method as claimed in claim 3, it is characterized in that to select the MCrAlY material for the powder of deposition master bond layer in the described step 3), wherein M comprises at least a or combination wherein of nickel, cobalt, iron, the average particle size distribution scope is 10～100 μ m, and the deposition method that adopts is hypersonic flame spraying or plasma spraying method.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900368A (en) * | 2017-12-21 | 2018-04-13 | 西安欧中材料科技有限公司 | A kind of preparation method of MCrAlY alloy powder used for plasma spraying |
| CN110408931A (en) * | 2019-09-02 | 2019-11-05 | 铜陵学院 | A kind of thermal barrier coating and preparation method thereof with the long-life |
| CN113122844A (en) * | 2021-04-27 | 2021-07-16 | 南昌航空大学 | Method for preparing composite coating on surface of nickel-based alloy through micro-arc oxidation and plasma sputtering |
| CN113825857A (en) * | 2019-05-15 | 2021-12-21 | 赛峰集团 | Method for forming aluminum oxide layer on surface of metal substrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030008167A1 (en) * | 2001-05-23 | 2003-01-09 | Michael Loch | Process for applying a heat shielding coating system on a metallic substrate |
| EP1327702A1 (en) * | 2002-01-10 | 2003-07-16 | ALSTOM (Switzerland) Ltd | Mcraiy bond coating and method of depositing said mcraiy bond coating |
| EP1411148A1 (en) * | 2002-10-15 | 2004-04-21 | ALSTOM Technology Ltd | Method of depositing a MCrALY-coating on an article and the coated article |
-
2012
- 2012-11-07 CN CN2012104441659A patent/CN102925841A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030008167A1 (en) * | 2001-05-23 | 2003-01-09 | Michael Loch | Process for applying a heat shielding coating system on a metallic substrate |
| EP1327702A1 (en) * | 2002-01-10 | 2003-07-16 | ALSTOM (Switzerland) Ltd | Mcraiy bond coating and method of depositing said mcraiy bond coating |
| EP1411148A1 (en) * | 2002-10-15 | 2004-04-21 | ALSTOM Technology Ltd | Method of depositing a MCrALY-coating on an article and the coated article |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900368A (en) * | 2017-12-21 | 2018-04-13 | 西安欧中材料科技有限公司 | A kind of preparation method of MCrAlY alloy powder used for plasma spraying |
| CN113825857A (en) * | 2019-05-15 | 2021-12-21 | 赛峰集团 | Method for forming aluminum oxide layer on surface of metal substrate |
| CN113825857B (en) * | 2019-05-15 | 2024-03-19 | 赛峰集团 | Method for forming aluminum oxide layer on surface of metal substrate |
| CN110408931A (en) * | 2019-09-02 | 2019-11-05 | 铜陵学院 | A kind of thermal barrier coating and preparation method thereof with the long-life |
| CN110408931B (en) * | 2019-09-02 | 2024-03-01 | 铜陵学院 | Thermal barrier coating with long service life and preparation method thereof |
| CN113122844A (en) * | 2021-04-27 | 2021-07-16 | 南昌航空大学 | Method for preparing composite coating on surface of nickel-based alloy through micro-arc oxidation and plasma sputtering |
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Application publication date: 20130213 |