CN103614713B - Method for preparing high-temperature composite coating on niobium-based surface by utilizing sol-gel method - Google Patents
Method for preparing high-temperature composite coating on niobium-based surface by utilizing sol-gel method Download PDFInfo
- Publication number
- CN103614713B CN103614713B CN201310651291.6A CN201310651291A CN103614713B CN 103614713 B CN103614713 B CN 103614713B CN 201310651291 A CN201310651291 A CN 201310651291A CN 103614713 B CN103614713 B CN 103614713B
- Authority
- CN
- China
- Prior art keywords
- niobium
- base alloy
- time
- zinc
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Chemically Coating (AREA)
Abstract
The invention discloses a method for preparing a high-temperature composite coating on a niobium-based surface by utilizing a sol-gel method. The method comprises the following steps: step 1, pretreating a niobium-based alloy specimen; step 2, preparing an intermediate bonding layer of the niobium-based alloy specimen in a chemical treatment manner; step 3, preparing Al2O sol-gel; step 4, performing dip-coating and drying; and step 5, performing vacuum heat treatment, thereby obtaining the high-temperature-resistant oxidation coating containing the intermediate bonding layer. The method has the advantages that 1, the process equipment is simple and easy to operate; the components of the coating are uniform and are controllable in thickness; the influence of the high temperature on the tissue property of a niobium substrate is avoided due to the adoption of a low heat treatment temperature; 2, the internal stress caused by the difference of thermal expansion coefficients between the substrate and the coating is effectively reduced under the action of the intermediate bonding layer, so that the combination between the coating with the substrate is improved; the capability of the coating for protecting the substrate from being oxidized is improved.
Description
Technical field
The invention belongs to and prepare high-temperature oxidation resistant coating technology on alloy substrate.Specifically a kind of niobium primary surface sol-gel method prepares the method for combined high temperature coating.The method employing is prepared middle close binder raising colloidal sol and is coagulated
Glue legal system for the combination between coating and matrix, thus reaches the oxidation resistant object of raising coating.
Background technology
Along with further developing of aeronautical and space technology, improving constantly of the thrust-weight ratios such as aerospacecraft, the use temperature of aircraft engine can reach more than 1200 DEG C, and rocket then reaches higher temperature, and traditional superalloy can not meet people's demand.The good characteristic of niobium alloy becomes one of important candidate material of thermal structure part in Aeronautics and Astronautics and nuclear industry.But niobium alloy is easily oxidized, just there is " pest " oxidation in pure niobium 600 DEG C.Improve niobium base high-temperature oxidation resistant mainly through coating protection at present, main method has fused slurry method, pack cementation method etc.
The preparation method of above-mentioned coating can see complex process, and thermal treatment temp is high, has a strong impact on substrate performance.Prepared coating due to and the thermal expansivity of matrix between there are differences and cause coating easy to crack, come off.And the patent be combined with matrix about improving coating rarely has report.
Such as CN201010591716 discloses a kind of aluminium (alcohol) salt hydrolysis preparation preparation Al
2o
3the method of coating.The colloidal sol prepared directly is coated in surface of metal product heat-treat, obtains Al
2o
3coating.Al
2o
3thermal expansivity 8.3 ~ 9.3 × 10
-6k
-1, the thermal expansivity of niobium-base alloy is 7.2 × 10
﹣ 6k
﹣ 1, because coating to there are differences with the thermal expansivity of niobium alloy and crystalline network is different, internal stress can be produced under high temperature and cause coating to crack coming off and lose the effect of protection matrix.CN103388137A has invented a kind of method of Electroless Plating Ni-p nano-coating, to the metal base material of oil removal treatment, carries out Electroless Plating Ni-p nano-coating, reaches certain thickness and namely obtain Ni-p nano-coating.Research finds that Ni-p coating has and suppresses crackle to produce and expansion effect, when reaching a timing when closing phosphorus amount in Ni-p coating, its structure is non-crystalline state, there is not crystal boundary, subgrain boundary, dislocation, fault, namely there is no the defect that common metal crystallization is all, therefore likely improve oxide coating and intermetallic combination.
The present invention improves coating by a kind of method that chemical pre-treatment and collosol and gel combine and is combined with niobium matrix, effectively solves coating itself with niobium matrix in conjunction with bad, reduce easily produce cracking in process under arms, obscission causes coating failure.
Summary of the invention
The object of the invention there are provided a kind of method that the primary surface of niobium simply and easily sol-gel method prepares combined high temperature coating.
The technical scheme that the present invention solves the problems of the technologies described above is:
Niobium primary surface sol-gel method prepares a method for combined high temperature coating, operates according to the following steps:
The first step: niobium-base alloy sample pretreatment:
With dehydrated alcohol, acetone cleaning and degreasing respectively after the pre-grinding of niobium-base alloy sample, drier after ultrasonic cleaning.
Second step: niobium-base alloy sample middle close binder is prepared in chemical treatment:
Prepare middle close binder step as follows:
1. electrochemical deoiling
By pretreated niobium-base alloy sample 15 ~ 40g/L Na
3pO
412H
2o, 10 ~ 30g/LNa
2cO
3with 5 ~ 15g/L Na
2siO
3the mixed solution of composition soaks under temperature 50 ~ 60 DEG C of conditions, and soak time is 4 ~ 5min, obtains the niobium-base alloy sample after the oil removing removal of impurity.
2. soda acid corrodes
1) 5 ~ 20g/L NaOH of the niobium-base alloy sample after the oil removing removal of impurity is carried out alkali erosion under temperature 20 ~ 30 DEG C of conditions, alkali erosion time is 10 ~ 20s.
2) the niobium-base alloy sample 20 ~ 80g/L H after alkali being corroded
2sO
4under temperature 20 ~ 30 DEG C of conditions, carry out acid attack, the acid attack time is 10 ~ 20s, is corroded niobium-base alloy specimen surface is fully activated by soda acid.
3. first time soaks zinc
Soda acid is corroded niobium-base alloy sample 40 ~ 80g/L NaOH, the 2 ~ 8g/LKNaC after process
4h
4o
6h
2o, 2 ~ 8g/L ZnO, 26g/LFeCl
36H
2o1 ~ 3g/L NaNO
3the mixed solution of composition carries out the reaction of first time leaching zinc under temperature 20-30 DEG C of condition, and galvanizing time is 20 ~ 60s.Niobium-base alloy specimen surface rough porous after first time leaching zinc, sticking power is bad, has small amounts film to remain unavoidably simultaneously.
4. move back zinc
By the niobium-base alloy sample 30 ~ 70g/L HNO after first time leaching zinc
3carry out moving back zinc under temperature 20 ~ 30 DEG C of conditions, moving back the zinc time is 60 ~ 90s, and the niobium-base alloy specimen surface after moving back zinc presents uniform active state.
5. second time soaks zinc
Niobium-base alloy sample 100 ~ 140g/L NaOH, 40 ~ 60g/L KNaC after zinc will be moved back
4h
4o
6h
2o, 10 ~ 30g/LZnO, 1 ~ 3g/L FeCl
36H
2o and 1 ~ 3g/L NaNO
3the mixed solution of composition carries out second time and soaks zinc under temperature is 20 ~ 30 DEG C of conditions, and second time galvanizing time is 10 ~ 30s, and the niobium-base alloy specimen surface after second time leaching zinc obtains thin and careful zinc layers.
6. chemical treatment
By the niobium-base alloy sample 20 ~ 30g/L NiSO after second time leaching zinc
46H
2o, 20 ~ 40g/LNaH
2pO
2h
2o, 15 ~ 25g/L CH
3cOONa, 15 ~ 25g/LNa
3c
6h
5o
7with 5 ~ 15g/L NH
4the mixed solution of Cl composition carries out chemical treatment under temperature is 70 ~ 90 DEG C of conditions, and chemical process time is 30 ~ 60min, after chemical treatment, obtain one deck middle close binder at niobium-base alloy specimen surface.
3rd step: Al
2prepared by O collosol and gel
Aluminum isopropylate 20.4g is dissolved in 270ml distilled water, is heated to 70 ~ 85 DEG C, uses HNO
3regulate pH to 2 ~ 3, after all dissolving, constant temperature stirs 1 ~ 2h and makes it be hydrolyzed, and puts into encloses container subsequently and in 85 ~ 95 DEG C of water bath with thermostatic control 8 ~ 10h, namely ageing 2 ~ 4d obtains stable Al
2o
3colloidal sol;
4th step: dip-coating, drying
Niobium-base alloy sample second step being obtained one deck middle close binder by crystal pulling method to immerse in colloidal sol dip-coating 3 times, lifts out liquid level with 4 ~ 6cm/min pull rate, then dry under room temperature;
5th step: vacuum heat treatment
Be 2 ~ 6 × 10 by the niobium-base alloy sample after the 4th step process in vacuum tightness
-2thermal treatment under Pa condition, vacuum tightness heat-treat condition: be heated to 500 DEG C of insulation 10h with 4 ~ 6 DEG C/min heat-up rate and cool to room temperature with identical heating rate with the furnace after 900 DEG C of insulation 5h again, namely obtain containing middle close binder high temperature coatings.
Advantage of the present invention:
1. the present invention has successfully prepared compound coating respectively on niobium-base alloy surface, and processing unit is simple, easy handling, and coating ingredients is even.
2. middle close binder effectively reduces the internal stress produced by thermal expansivity difference between matrix and coating, improves the combination of coating and matrix, improves coating protection matrix from oxidation.
3. adopt lower thermal treatment temp, thus avoid high temperature on the impact of niobium matrix performance.
4. the present invention is applicable to the specimen surface of complex shape, and coating uniform and thickness can control.
Accompanying drawing explanation
Fig. 1 is Al of the present invention
2o
3coatingsurface SEM microscopic appearance figure.
Fig. 2 is Al of the present invention
2o
3coating XRD figure is composed.
Fig. 3 is Al of the present invention
2o
3coating 950 DEG C of oxidation kinetics graphic representations.
Fig. 4 is Al of the present invention
2o
3coating 1050 DEG C of oxidation kinetics graphic representations.
Fig. 5 is Al of the present invention
2o
3coating 1050 DEG C of high temperature oxidation 19h rear interface shape appearance figures.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Niobium primary surface sol-gel method prepares the method for combined high temperature coating:
The first step: niobium-base alloy sample pretreatment:
With dehydrated alcohol, acetone cleaning and degreasing respectively after the pre-grinding of niobium-base alloy sample, drier after ultrasonic cleaning.
Second step: niobium-base alloy sample middle close binder is prepared in chemical treatment:
Prepare middle close binder step as follows:
1. electrochemical deoiling
By pretreated niobium-base alloy sample 15g/L Na
3pO
412H
2o, 10g/L Na
2cO
3and 5g/LNa
2siO
3the mixed solution of composition soaks under temperature 50 C condition, and soak time is 4min, obtains the niobium-base alloy sample after the oil removing removal of impurity.
2. soda acid corrodes
1) the niobium-base alloy sample 5g/L NaOH after the oil removing removal of impurity is carried out alkali erosion under temperature 20 DEG C of conditions, alkali erosion time is 10s.
2) the niobium-base alloy sample 20g/L H after alkali being corroded
2sO
4under temperature 20 DEG C of conditions, carry out acid attack, the acid attack time is 10s, is corroded niobium-base alloy specimen surface is fully activated by soda acid.
3. first time soaks zinc
Soda acid is corroded niobium-base alloy sample 40g/L NaOH, the 2g/L KNaC after process
4h
4o
6h
2o, 2g/L ZnO, 2g/LFeCl
36H
2o, 1g/L NaNO
3the mixed solution of composition carries out the reaction of first time leaching zinc under temperature 20 DEG C of conditions, and galvanizing time is 20s.Niobium-base alloy specimen surface rough porous after first time leaching zinc, sticking power is bad, has small amounts film to remain unavoidably simultaneously.
4. move back zinc
By the niobium-base alloy sample 30g/L HNO after first time leaching zinc
3carry out moving back zinc under temperature 20 DEG C of conditions, moving back the zinc time is 60s, and the niobium-base alloy specimen surface after moving back zinc presents uniform active state.
5. second time soaks zinc
Niobium-base alloy sample 100g/L NaOH, 40g/L KNaC after zinc will be moved back
4h
4o
6h
2o, 10g/LZnO, 1g/L FeCl
36H
2o and 1g/L NaNO
3the mixed solution of composition carries out second time and soaks zinc under temperature is 20 DEG C of conditions, and second time galvanizing time is 10s, and the niobium-base alloy specimen surface after second time leaching zinc obtains thin and careful zinc layers.
6. chemical treatment
By the niobium-base alloy sample 20g/L NiSO after second time leaching zinc
46H
2o, 20g/LNaH
2pO
2h
2o, 15g/L CH
3cOONa, 15g/LNa
3c
6h
5o
7with 5g/L NH
4the mixed solution of Cl composition carries out chemical treatment under temperature is 70 DEG C of conditions, and chemical process time is 30min, after chemical treatment, obtain one deck middle close binder at niobium-base alloy specimen surface.
3rd step: Al
2prepared by O collosol and gel
Aluminum isopropylate 20.4g is dissolved in 270ml distilled water, is heated to 70 DEG C, uses HNO
3regulate pH to 2, after all dissolving, constant temperature stirs 1h and makes it be hydrolyzed, and puts into encloses container subsequently and in 85 DEG C of water bath with thermostatic control 8h, namely ageing 2d obtains stable Al
2o
3colloidal sol;
4th step: dip-coating, drying
Niobium-base alloy sample second step being obtained one deck middle close binder by crystal pulling method to immerse in colloidal sol dip-coating 3 times, lifts out liquid level with 4cm/min pull rate, then dry under room temperature;
5th step: vacuum heat treatment
Be 2 ~ 6 × 10 by the niobium-base alloy sample after the 4th step process in vacuum tightness
-2thermal treatment under Pa condition, vacuum tightness heat-treat condition: be heated to 500 DEG C of insulation 10h with 4 DEG C/min heat-up rate and cool to room temperature with identical heating rate with the furnace after 900 DEG C of insulation 5h again, namely obtain containing middle close binder high temperature coatings.Find that coatingsurface is complete as shown in Figure 1 by scanning electronic microscope, without coming off cracking phenomena, X-ray diffraction finds that coating is thinner, and X-ray has detected matrix phase, obviously can see matrix phase in Fig. 2, and coatingsurface is Al
2o
3phase.
Embodiment 2
Niobium primary surface sol-gel method prepares the method for combined high temperature coating:
The first step: niobium-base alloy sample pretreatment:
With dehydrated alcohol, acetone cleaning and degreasing respectively after the pre-grinding of niobium-base alloy sample, drier after ultrasonic cleaning.
Second step: niobium-base alloy sample middle close binder is prepared in chemical treatment:
Prepare middle close binder step as follows:
1. electrochemical deoiling
By pretreated niobium-base alloy sample 40g/L Na
3pO
412H
2o, 30g/L Na
2cO
3with 15g/L Na
2siO
3the mixed solution of composition soaks under temperature 60 C condition, and soak time is 5min, obtains the niobium-base alloy sample after the oil removing removal of impurity.
2. soda acid corrodes
1) the niobium-base alloy sample 20g/L NaOH after the oil removing removal of impurity is carried out alkali erosion under temperature 30 DEG C of conditions, alkali erosion time is 20s.
2) the niobium-base alloy sample 80g/L H after alkali being corroded
2sO
4under temperature 30 DEG C of conditions, carry out acid attack, the acid attack time is 20s, is corroded niobium-base alloy specimen surface is fully activated by soda acid.
3. first time soaks zinc
Soda acid is corroded niobium-base alloy sample 80g/L NaOH, the 8g/L KNaC after process
4h
4o
6h
2o, 8g/L ZnO, 6g/LFeCl
36H
2o, 3g/L NaNO
3the mixed solution of composition carries out the reaction of first time leaching zinc under temperature 30 DEG C of conditions, and galvanizing time is 60s.Niobium-base alloy specimen surface rough porous after first time leaching zinc, sticking power is bad, has small amounts film to remain unavoidably simultaneously.
4. move back zinc
By the niobium-base alloy sample 70g/L HNO after first time leaching zinc
3carry out moving back zinc under temperature 30 DEG C of conditions, moving back the zinc time is 90s, and the niobium-base alloy specimen surface after moving back zinc presents uniform active state.
5. second time soaks zinc
Niobium-base alloy sample 140g/L NaOH, 60g/L KNaC after zinc will be moved back
4h
4o
6h
2o, 30g/LZnO, 3g/L FeCl
36H
2o and 3g/L NaNO
3the mixed solution of composition carries out second time and soaks zinc under temperature is 30 DEG C of conditions, and second time galvanizing time is 30s, and the niobium-base alloy specimen surface after second time leaching zinc obtains thin and careful zinc layers.
6. chemical treatment
By the niobium-base alloy sample 30g/L NiSO after second time leaching zinc
46H
2o, 40g/LNaH
2pO
2h
2o, 25g/L CH
3cOONa, 25g/LNa
3c
6h
5o
7with 15g/L NH
4the mixed solution of Cl composition carries out chemical treatment under temperature is 90 DEG C of conditions, and chemical process time is 60min, after chemical treatment, obtain one deck middle close binder at niobium-base alloy specimen surface.
3rd step: Al
2prepared by O collosol and gel
Aluminum isopropylate 20.4g is dissolved in 270ml distilled water, is heated to 85 DEG C, uses HNO
3regulate pH to 3, after all dissolving, constant temperature stirs 2h and makes it be hydrolyzed, and puts into encloses container subsequently and in 95 DEG C of water bath with thermostatic control 10h, namely ageing 4d obtains stable Al
2o
3colloidal sol;
4th step: dip-coating, drying
Niobium-base alloy sample second step being obtained one deck middle close binder by crystal pulling method to immerse in colloidal sol dip-coating 3 times, lifts out liquid level with 6cm/min pull rate, then dry under room temperature;
5th step: vacuum heat treatment
Be 2 ~ 6 × 10 by the niobium-base alloy sample after the 4th step process in vacuum tightness
-2thermal treatment under Pa condition, vacuum tightness heat-treat condition: be heated to 500 DEG C of insulation 10h with 6 DEG C/min heat-up rate and cool to room temperature with identical heating rate with the furnace after 900 DEG C of insulation 5h again, namely obtain containing middle close binder high temperature coatings.Constant temperature oxidation test finds that coating has very high oxidation resistent susceptibility 950 DEG C and 1050 DEG C as shown in Figure 3,4; 33% is improve with matrix phase ratio; the Cross Section Morphology of 1050 DEG C of high temperature oxidations as shown in Figure 5; coating coating and basal body interface place after 1050 DEG C of high temperature oxidation 19h create a little crackle, play a very good protection to matrix.
Claims (1)
1. niobium primary surface sol-gel method prepares a method for combined high temperature coating, it is characterized in that, operates according to the following steps:
The first step: niobium-base alloy sample pretreatment:
With dehydrated alcohol, acetone cleaning and degreasing respectively after the pre-grinding of niobium-base alloy sample, drier after ultrasonic cleaning;
Second step: niobium-base alloy sample middle close binder is prepared in chemical treatment:
Prepare middle close binder step as follows:
1) electrochemical deoiling
By pretreated niobium-base alloy sample 15 ~ 40g/L Na
3pO
412H
2o, 10 ~ 30g/LNa
2cO
3with 5 ~ 15g/L Na
2siO
3the mixed solution of composition soaks under temperature 50 ~ 60 DEG C of conditions, and soak time is 4 ~ 5min, obtains the niobium-base alloy sample after the oil removing removal of impurity;
2) soda acid corrodes
(1) 5 ~ 20g/L NaOH of the niobium-base alloy sample after the oil removing removal of impurity is carried out alkali erosion under temperature 20 ~ 30 DEG C of conditions, alkali erosion time is 10 ~ 20s;
(2) the niobium-base alloy sample 20 ~ 80g/L H after alkali being corroded
2sO
4under temperature 20 ~ 30 DEG C of conditions, carry out acid attack, the acid attack time is 10 ~ 20s, is corroded niobium-base alloy specimen surface is fully activated by soda acid;
3) first time soaks zinc
Soda acid is corroded niobium-base alloy sample 40 ~ 80g/L NaOH, the 2 ~ 8g/LKNaC after process
4h
4o
6h
2o, 2 ~ 8g/L ZnO, 26g/LFeCl
36H
2o1 ~ 3g/L NaNO
3the mixed solution of composition carries out the reaction of first time leaching zinc under temperature 20-30 DEG C of condition, and galvanizing time is 20 ~ 60s, the niobium-base alloy specimen surface rough porous after first time leaching zinc, and sticking power is bad, has small amounts film to remain unavoidably simultaneously;
4) zinc is moved back
By the niobium-base alloy sample 30 ~ 70g/L HNO after first time leaching zinc
3carry out moving back zinc under temperature 20 ~ 30 DEG C of conditions, moving back the zinc time is 60 ~ 90s, and the niobium-base alloy specimen surface after moving back zinc presents uniform active state;
5) second time soaks zinc
Niobium-base alloy sample 100 ~ 140g/L NaOH, 40 ~ 60g/L KNaC after zinc will be moved back
4h
4o
6h
2o, 10 ~ 30g/LZnO, 1 ~ 3g/L FeCl
36H
2o and 1 ~ 3g/L NaNO
3the mixed solution of composition carries out second time and soaks zinc under temperature is 20 ~ 30 DEG C of conditions, and second time galvanizing time is 10 ~ 30s, and the niobium-base alloy specimen surface after second time leaching zinc obtains thin and careful zinc layers;
6) chemical treatment
By the niobium-base alloy sample 20 ~ 30g/L NiSO after second time leaching zinc
46H
2o, 20 ~ 40g/LNaH
2pO
2h
2o, 15 ~ 25g/L CH
3cOONa, 15 ~ 25g/LNa
3c
6h
5o
7with 5 ~ 15g/L NH
4the mixed solution of Cl composition carries out chemical treatment under temperature is 70 ~ 90 DEG C of conditions, and chemical process time is 30 ~ 60min, after chemical treatment, obtain one deck middle close binder at niobium-base alloy specimen surface;
3rd step: Al
2o
3prepared by collosol and gel
Aluminum isopropylate 20.4g is dissolved in 270ml distilled water, is heated to 70 ~ 85 DEG C, uses HNO
3regulate pH to 2 ~ 3, after all dissolving, constant temperature stirs 1 ~ 2h and makes it be hydrolyzed, and puts into encloses container subsequently and in 85 ~ 95 DEG C of water bath with thermostatic control 8 ~ 10h, namely ageing 2 ~ 4d obtains stable Al
2o
3colloidal sol;
4th step: dip-coating, drying
Niobium-base alloy sample second step being obtained one deck middle close binder by crystal pulling method to immerse in colloidal sol dip-coating 3 times, lifts out liquid level with 4 ~ 6cm/min pull rate, then dry under room temperature;
5th step: vacuum heat treatment
Be 2 × 10 by the niobium-base alloy sample after the 4th step process in vacuum tightness
-2~ 6 × 10
-2thermal treatment under Pa condition, vacuum tightness heat-treat condition: be heated to 500 DEG C of insulation 10h with 4 ~ 6 DEG C/min heat-up rate and cool to room temperature with identical heating rate with the furnace after 900 DEG C of insulation 5h again, namely obtain containing middle close binder high temperature coatings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310651291.6A CN103614713B (en) | 2013-12-05 | 2013-12-05 | Method for preparing high-temperature composite coating on niobium-based surface by utilizing sol-gel method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310651291.6A CN103614713B (en) | 2013-12-05 | 2013-12-05 | Method for preparing high-temperature composite coating on niobium-based surface by utilizing sol-gel method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN103614713A CN103614713A (en) | 2014-03-05 |
CN103614713B true CN103614713B (en) | 2015-07-22 |
Family
ID=50165427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201310651291.6A Active CN103614713B (en) | 2013-12-05 | 2013-12-05 | Method for preparing high-temperature composite coating on niobium-based surface by utilizing sol-gel method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103614713B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103938190B (en) * | 2014-05-16 | 2016-04-06 | 西安建筑科技大学 | The preparation method of a kind of molybdenum and molybdenum alloy surface oxidation resistant coating |
CN104746059B (en) * | 2015-04-10 | 2017-08-25 | 核工业理化工程研究院 | Suppress the preparation method of the coating of metal uranium surface spontaneous combustion |
CN105386013B (en) * | 2015-11-16 | 2017-11-10 | 西安建筑科技大学 | A kind of molybdenum or molybdenum alloy surface Pd CeO2The preparation method of Co nano coatings |
CN113512742B (en) * | 2021-04-23 | 2023-07-07 | 南昌航空大学 | Pretreatment method for high-temperature alloy surface and electrodeposition method for high-temperature alloy surface |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3438028B2 (en) * | 2000-11-29 | 2003-08-18 | 独立行政法人産業技術総合研究所 | Nb3Si5Al2-Al2O3 two-layer coated Nb-based alloy and method for producing the same |
CN102021545A (en) * | 2010-12-16 | 2011-04-20 | 沈阳化工大学 | Preparation method of Al2O3 coating with high temperature oxidation resistance |
CN102251234B (en) * | 2011-07-04 | 2012-10-24 | 成都理工大学 | Method for preparing Al2O3 coated hard alloy based on sol-gel method |
CN102531554B (en) * | 2012-01-06 | 2013-03-27 | 天津大学 | Hexaaluminate-embedded alumina composite coating and preparation method thereof |
-
2013
- 2013-12-05 CN CN201310651291.6A patent/CN103614713B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN103614713A (en) | 2014-03-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103614713B (en) | Method for preparing high-temperature composite coating on niobium-based surface by utilizing sol-gel method | |
CN102345127B (en) | Surface treatment method of superhydrophobic aluminum foil | |
CN100464007C (en) | Process for preparing neodymium-iron-boron permanent magnetic material surface gradient function coating layer | |
CN104651908B (en) | The preparation method and method for sealing of a kind of Mg alloy surface ceramic film | |
CN100408725C (en) | Process for compound surface sheilding of metal magnesium and magnesium alloy | |
CN107779713B (en) | A kind of beryllium alumin(i)um alloy and preparation method thereof | |
CN1900360A (en) | Process for preparing magnesium alloy surface function gradient film | |
CN103668030A (en) | Improved hot galvanizing method of iron handicraft or furniture | |
CN110565148B (en) | Magnesium alloy black micro-arc oxidation film nano passivator and passivation method | |
CN113429820B (en) | Oriented Mxene/Co conductive filler for anti-corrosion coating and preparation method thereof | |
CN104141138A (en) | Preparation method of micro-arc oxidation-composite chemical nickel plating coating layer on surface of magnesium alloy | |
CN103668368A (en) | Preparation process of molybdenum/palladium/silver laminar metal matrix composite | |
CN113106434A (en) | Environment-friendly aluminum alloy chemical oxidation liquid and chemical oxidation method | |
CN102899703A (en) | Silicate electrolyte and application of silicate electrolyte in magnesium alloy micro-arc oxidation film preparation | |
CN103320776B (en) | A kind of antivacuum middle high temperature solar energy selective absorption coating compound antireflective film and preparation method thereof | |
CN104561980A (en) | Surface treatment method for magnesium alloy | |
CN103484824B (en) | Compoiste adhering layer material of a kind of anti-1200 DEG C of resistance to combustion gas thermal etchings of high temperature oxidation and preparation method thereof | |
CN104342683A (en) | Magnesium alloy work-piece surface anti-corrosion conversion film treatment process | |
CN113215627A (en) | Method for preparing super-hydrophobic zinc sulfide coating on surface of stainless steel | |
CN103695905B (en) | A kind of method preparing composite nickel coating on magnesium alloy differential arc oxidation film surface | |
CN101892468A (en) | Preparation method of chemically plating Ni-W-P ternary alloy on surface of Mg-Li alloy | |
Ji et al. | Effect of titanium sol on sulfuric-citric acids anodizing of 7150 aluminum alloy | |
CN101358046B (en) | Silicon oxide-containing nano paint, preparation method and application thereof | |
CN203080040U (en) | Nano-porous surface structure of intensifying and boiling metal | |
CN114032547B (en) | Alloy surface composite coating and preparation method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |