CN104120426A - Mo-Si-B coating on niobium-based alloy and preparation method of Mo-Si-B coating - Google Patents
Mo-Si-B coating on niobium-based alloy and preparation method of Mo-Si-B coating Download PDFInfo
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- CN104120426A CN104120426A CN201410360800.4A CN201410360800A CN104120426A CN 104120426 A CN104120426 A CN 104120426A CN 201410360800 A CN201410360800 A CN 201410360800A CN 104120426 A CN104120426 A CN 104120426A
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Abstract
The invention discloses a Mo-Si-B coating on niobium-based alloy and a preparation method of the Mo-Si-B coating. The method comprises the steps of firstly, preparing a Mo layer on a Nb-based alloy by using an atmospheric plasma spraying process; then, enabling Si-B to be infiltrated to the Mo layer by using a pack cementation process to obtain a composite Mo-Si-B coating. Mo reacts with Si-B in the pack cementation process to generate MoSi2 and dispersed B. The Mo-Si-B coating disclosed by the invention is 100-140mu m thick and is structurally composed of the Mo layer in contact with a Nb-based alloy matrix and a MoSi2+B dispersed phase layer distributed outside the Mo layer. The coating can form a continuous, compact and good-cohesiveness borosilicate oxide layer when oxidizing at high temperature of 1250 DEG C, so that the high temperature oxidation resistance of the matrix is improved.
Description
Technical field
The present invention relates to a kind of high temperature coatings, more particularly, refer to that the technique that a kind of employing first sprays rear embedding prepares compound Mo-Si-B coating, particularly, coating internal layer Mo layer, skin is MoSi
2+ B disperse phase layer.
Background technology
Nb-16Si-22Ti-17Cr-2Al-2Hf alloy melting point is high, ductility and thermal conductivity is good, intensity and specific tenacity is high and density is moderate, so this alloy is the ultrahigh-temperature structural metallic materials that is hopeful to replace nickel base superalloy most.But, in the air of Nb-16Si-22Ti-17Cr-2Al-2Hf alloy more than 600 DEG C, can there is vigorous oxidation, to such an extent as to can not in oxygenated environment, use in unshielded situation.The effective measure that address this problem are to prepare high-temperature protection coating at alloy surface.
Plasma spraying is the technology of a kind of material surface strengthening and surface modification, can make matrix surface have the performances such as wear-resisting, anti-corrosion, high temperature oxidation resisting, electrical isolation, heat insulation, radioprotective, anti-attrition and sealing.Plasma painting technology is to adopt by the plasma arc of direct-current drive as thermal source, the materials such as pottery, alloy, metal are heated to melting or semi-melting state, and to spray at a high speed the method that forms the upper layer of adhere firmly through pretreated workpiece surface.But shortcoming not fine and close, that porosity is higher that the upper layer that plasma spraying makes has.
Pack cementation technique is a kind of thermo-chemical treatment technology, material to be coated with to be embedded in to the bag being made up of inert filler, metallic coating element and halogenide promoting agent ooze in case, in hydrogen or certain rare gas element, heat-treat, by vapor migration and diffusion with form coating.Between coating and matrix metal, be metallurgical binding, thereby very firm, difficult drop-off, this be other coating processes can't be obtained.But because pack cementation method treatment temp is higher and the time is longer, therefore the performances such as the intensity of matrix metal likely can decrease.
Summary of the invention
The object of the invention is to propose a kind of method of preparing compound Mo-Si-B coating on Nb-16Si-22Ti-17Cr-2Al-2Hf alloy, the method is the decline in order to improve the substrate performance that the comparatively high temps that occurs in pack cementation technique brings, first coat Mo layer by plasma spray and be introduced on matrix, then MoSi processed
2the B layer of+disperse; The combination of two kinds of techniques, can make to make Mo-Si-B coating Nb base alloy is played to resistance to high temperature oxidation effect.
The preparation method of the Mo-Si-B coating on a kind of niobium-base alloy that the present invention proposes, is characterized in that including the following step:
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6～2.0;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～20min, obtain the second sample;
Second step: plasma spray coats Mo layer
The second sample, through air plasma spraying Mo layer processed, is obtained to the 3rd sample;
The particle diameter of Mo powder is 75～150 μ m;
Air plasma spraying processing parameter: the electric current of air plasma spraying is that 450 A, voltage are that 65 V, argon flow amount are that 60 l/min, hydrogen flowing quantity are 20 l/min; Spray distance is that 80～100 mm, powder feeding rate are 20～25 g/min; In deposition process, matrix surface medial temperature is 300～400 DEG C;
The 3rd step: Si-B embedding bleed processed
100g embedding bleed processed is that 100 object NaF powder, 20.0～36.0g granularity are that 100 object Si powder, 0.6～1.1g granularity are that 400 object B powder and surplus granularity are 100 object Al by 1.2～2.1g granularity
2o
3powder composition;
The 4th step: adopt pack cementation technique to prepare Si-B coating
(A) the embedding bleed the 3rd step being made is put into crucible bottom, then the 3rd sample after treatment in second step is put into crucible middle part, and fill up the embedding bleed of surplus in its surrounding, cover after crucible lid sealing, form heat treated sample, and heat treated sample is inserted in resistance furnace;
(B) temperature rise rate that resistance furnace is set is 3～7 DEG C/min, 950 DEG C～1050 DEG C of pack cementation temperature, pack cementation time 45～55h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min～150 ml/min; Under argon shield, ooze Si-B material;
(D) in the time that the pack cementation time finishes, close resistance furnace, while being cooled to 100 DEG C with resistance furnace, stop passing into argon gas; Open fire door and take out sample, make the 4th sample;
(E) the 4th sample is put into alcohol through ultrasonic cleaning after 10～20 minutes, natural air drying, obtains the Mo-Si-B coating being impregnated with on Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate surface.
The advantage that the present invention prepares Mo-Si-B coating is:
1. the present invention adopts the combination process of the first rear embedding of spraying, is to be MoSi in order to make outer at Nb base alloy surface
2layer, internal layer is Mo layer (and substrate contact).
2. the Mo-Si-B coating that the present invention makes is significantly improved the high-temperature oxidation resistance of Nb-16Si-22Ti-17Cr-2Al-2Hf ultrahigh temperature alloy.
3. it is owing to can form continuous, fine and close borosilicate oxide skin in the time being oxidized for 1250 DEG C that the coating of preparing through the inventive method has excellent oxidation-resistance, and B
2o
3can reduce SiO
2viscosity, improve mobility, thus the function of performance crackle self-healing.
Brief description of the drawings
Fig. 1 is the section S EM photo of the 5th sample that makes of embodiment 1.
Fig. 2 is the XRD figure of the 5th sample that makes of embodiment 1.
Fig. 3 is the surperficial SEM photo after embodiment 1 the 5th sample is oxidized.
Fig. 4 is the section S EM photo after embodiment 1 the 5th sample is oxidized
Fig. 5 is the XRD figure after embodiment 1 the 5th sample is oxidized.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention is a kind of method that adopts plasma spraying and pack cementation process combination to prepare Mo-Si-B coating on Nb based high-temperature alloy, and this coating production has the following step:
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6～2.0;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～20min, obtain the second sample;
In the present invention, matrix is polished to clean be clean surface for obtaining having certain roughness, the matrix surface with less roughness is conducive to the tight deposition of Mo material.
Second step: plasma spray coats Mo layer
The second sample, through air plasma spraying Mo layer processed, is obtained to the 3rd sample;
The particle diameter of the Mo powder of choosing is 75～150 μ m, and the mass percent purity of Mo powder is 99.9%;
Air plasma spraying processing parameter:
(A) arrange, the electric current of air plasma spraying is that 450 A, voltage are that 65 V, argon flow amount are that 60 l/min, hydrogen flowing quantity are 20 l/min;
(B) arrange, in deposition process, matrix surface medial temperature is 300～400 DEG C;
(C) regulate, spray distance is that 80～100 mm, powder feeding rate are 20～25 g/min;
The 3rd step: Si-B embedding bleed processed
100g embedding bleed processed is that 100 object NaF powder, 20.0～36.0g granularity are that 100 object Si powder, 0.6～1.1g granularity are that 400 object B powder and surplus granularity are 100 object Al by 1.2～2.1g granularity
2o
3powder composition;
In the present invention, the Al adding
2o
3powder does not participate in reaction in pack cementation process, only as filler.This filler, not affecting on the basis of coating formation, can reduce production costs effectively, has also reduced the waste of reactant simultaneously.
In the present invention, add NaF powder to react with Si powder and B powder, form corresponding gaseous compound, only have this compound just can produce the active atomic of Si and B, penetrate into Nb-16Si-22Ti-17Cr-2Al-2Hf high-temperature alloy surface.
The 4th step: adopt pack cementation technique to prepare Si-B coating
(A) the embedding bleed the 3rd step being made is put into crucible bottom, then the 3rd sample after treatment in second step is put into crucible middle part, and fill up the embedding bleed of surplus in its surrounding, cover after crucible lid sealing, form heat treated sample, and heat treated sample is inserted in resistance furnace;
(B) temperature rise rate that resistance furnace is set is 3～7 DEG C/min, 950 DEG C～1050 DEG C of pack cementation temperature, pack cementation time 45～55h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min～150 ml/min; Under argon shield, ooze Si-B material;
(D) in the time that the pack cementation time finishes, close resistance furnace, while being cooled to 100 DEG C with resistance furnace, stop passing into argon gas; Open fire door and take out sample, make the 4th sample;
(E) the 4th sample is put into alcohol through ultrasonic cleaning after 10～20 minutes, natural air drying, obtains the 5th sample;
The 5th sample is for to be prepared with compound Mo-Si-B coating on Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate surface, what contact with Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is Mo layer, and being distributed in outside Mo layer is MoSi
2+ B disperse phase layer.
embodiment 1
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is carried out to surface grinding processing, make the first sample; The surfaceness of described the first sample is Ra=1.6;
(B) the first sample being put into dehydrated alcohol, is under the condition of 30 KHz in ultrasonic frequency, carries out after ultrasonic cleaning 15min, and after cleaning, natural air drying obtains the second sample;
Second step: plasma spray coats Mo layer
The second sample, through air plasma spraying Mo layer processed, is obtained to the 3rd sample;
The particle diameter of Mo powder is 100 μ m;
Air plasma spraying processing parameter: the electric current of air plasma spraying is that 450 A, voltage are that 65 V, argon flow amount are that 60 l/min, hydrogen flowing quantity are 20 l/min; In deposition process, matrix surface medial temperature is 350 DEG C; Spray distance is that 95 mm, powder feeding rate are 22 g/min;
The 3rd step: Si-B embedding bleed processed
100g embedding bleed processed is that 100 object NaF powder, 34g granularity are that 100 object Si powder, 1g granularity are that 400 object B powder and surplus granularity are 100 object Al by 2g granularity
2o
3powder composition;
The 4th step: adopt pack cementation technique to prepare Si-B coating
(A) the embedding bleed the 3rd step being made is put into crucible bottom, then the 3rd sample after treatment in second step is put into crucible middle part, and fill up the embedding bleed of surplus in its surrounding, cover after crucible lid sealing, form heat treated sample, and heat treated sample is inserted in resistance furnace;
(B) temperature rise rate that resistance furnace is set is 5 DEG C/min, 1000 DEG C of pack cementation temperature, pack cementation time 50h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 100ml/min; Under argon shield, ooze Si-B material;
(D) in the time that the pack cementation time finishes, close resistance furnace, while being cooled to 100 DEG C with resistance furnace, stop passing into argon gas; Open fire door and take out sample, make the 4th sample;
(E) the 4th sample being put into alcohol, is under the condition of 30 KHz in ultrasonic frequency, after 15 minutes, takes out natural air drying through ultrasonic cleaning, obtains the 5th sample.
Obtain the 5th sample through embodiment 1 and show through SEM (as Fig. 1) and XRD (as Fig. 2) analysis, the thickness of the 5th sample is 127 μ m, and skin is MoSi
2+ B disperse phase layer, thickness is 102 μ m, and internal layer is Mo layer, and thickness is 25 μ m.
High temperature oxidation experiment:
High-temperature oxidation test temperature is 1250 DEG C, the 5th sample making is placed in to high temperature process furnances carries out high temperature oxidation process through embodiment 1, measures sample mass and changes and adopt XRD, SEM observation and analysis composition.
In air atmosphere, through 1250 DEG C of isothermal oxidation 100h.
Performance test: the weightening finish of coatingsurface unit surface is 1.28mg/cm
2.
Nb-16Si-22Ti-17Cr-2Al-2Hf matrix, in air atmosphere, after 1250 DEG C of isothermal oxidation 100h, is recorded to the weightening finish of matrix surface unit surface for 190.08mg/cm
2.
By the 5th sample, in air atmosphere, after 1250 DEG C of isothermal oxidation 100h, recording the 5th specimen surface unit surface weightening finish is 1.28mg/cm
2.The 5th sample and the contrast of Nb-16Si-22Ti-17Cr-2Al-2Hf matrix phase, its unit surface weightening finish has reduced 188.80mg/cm
2, prove that the cated matrix of preparation has better high temperature oxidation resistance.
The 5th sample after oxidation, its compound Mo-Si-B coatingsurface, cross section show through SEM (as Fig. 3 and Fig. 4) and XRD (as Fig. 5) analysis, in the time of 1250 DEG C of oxidations, can form continuous, fine and close borosilicate (SiO
2-B
2o
3) zone of oxidation, and B
2o
3can reduce SiO
2viscosity, improve mobility, thereby the function of performance crackle self-healing prevents that matrix is oxidized effectively.After 1250 DEG C of oxidations, form the thick zone of oxidation of 5～10 μ m, so the Mo in coating
5si
3in surperficial XRD test, be also detected.
In the present invention, Mo-Si-B ternary alloy coating has the features such as stable and life-span of excellent oxidation-resistance, creep resistance, structure property is long, can be applicable to aircraft engine structured material of new generation and high-temperature oxidation resistant coating material, in high temperature oxidation atmosphere, matrix alloy surface forms the Si-B-O eutectic oxide film of low melting point, thus the function of performance crackle self-healing.
embodiment 2
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is carried out to surface grinding processing, make the first sample; The surfaceness of described the first sample is Ra=1.8;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 15min, obtain the second sample;
Second step: plasma spray coats Mo layer
The second sample, through air plasma spraying Mo layer processed, is obtained to the 3rd sample;
The particle diameter of Mo powder is 75 μ m;
Air plasma spraying processing parameter: the electric current of air plasma spraying is that 450 A, voltage are that 65 V, argon flow amount are that 60 l/min, hydrogen flowing quantity are 20 l/min; In deposition process, matrix surface medial temperature is 300 DEG C; Spray distance is that 100 mm, powder feeding rate are 20 g/min;
The 3rd step: Si-B embedding bleed processed
100g embedding bleed processed is that 100 object NaF powder, 20.0g granularity are that 100 object Si powder, 0.6g granularity are that 400 object B powder and surplus granularity are 100 object Al by 1.2g granularity
2o
3powder composition;
The 4th step: adopt pack cementation technique to prepare Si-B coating
(A) the embedding bleed the 3rd step being made is put into crucible bottom, then the 3rd sample after treatment in second step is put into crucible middle part, and fill up the embedding bleed of surplus in its surrounding, cover after crucible lid sealing, form heat treated sample, and heat treated sample is inserted in resistance furnace;
(B) temperature rise rate that resistance furnace is set is 3 DEG C/min, 950 DEG C of pack cementation temperature, pack cementation time 55h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min; Under argon shield, ooze Si-B material;
(D) in the time that the pack cementation time finishes, close resistance furnace, while being cooled to 100 DEG C with resistance furnace, stop passing into argon gas; Open fire door and take out sample, make the 4th sample;
(E) the 4th sample is put into alcohol and after 15 minutes, taken out natural air drying through ultrasonic cleaning, obtain the 5th sample.
The thickness of the Mo-Si-B coating of the 5th sample making through embodiment 2 is 103 μ m, and skin is MoSi
2+ B disperse phase layer, thickness is 85 μ m, and internal layer is Mo layer, and thickness is 18 μ m.
The 5th sample that embodiment 2 is made carries out high temperature oxidation experiment test, and the weightening finish of coatingsurface unit surface is 1.30mg/cm
2, with matrix phase contrast, its unit surface weightening finish has reduced 188.78mg/cm
2, prove that the cated matrix of preparation has better high temperature oxidation resistance.
embodiment 3
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is carried out to surface grinding processing, make the first sample; The surfaceness of described the first sample is Ra=2.0;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 15min, obtain the second sample;
Second step: plasma spray coats Mo layer
The second sample, through air plasma spraying Mo layer processed, is obtained to the 3rd sample;
The particle diameter of Mo powder is 150 μ m;
Air plasma spraying processing parameter: the electric current of air plasma spraying is that 450 A, voltage are that 65 V, argon flow amount are that 60 l/min, hydrogen flowing quantity are 20 l/min; In deposition process, matrix surface medial temperature is 400 DEG C; Spray distance is that 80 mm, powder feeding rate are 25 g/min;
The 3rd step: Si-B embedding bleed processed
100g embedding bleed processed is that 100 object NaF powder, 36.0g granularity are that 100 object Si powder, 1.1g granularity are that 400 object B powder and surplus granularity are 100 object Al by 2.1g granularity
2o
3powder composition;
The 4th step: adopt pack cementation technique to prepare Si-B coating
(A) the embedding bleed the 3rd step being made is put into crucible bottom, then the 3rd sample after treatment in second step is put into crucible middle part, and fill up the embedding bleed of surplus in its surrounding, cover after crucible lid sealing, form heat treated sample, and heat treated sample is inserted in resistance furnace;
(B) temperature rise rate that resistance furnace is set is 7 DEG C/min, 1050 DEG C of pack cementation temperature, pack cementation time 50h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 120ml/min; Under argon shield, ooze Si-B material;
(D) in the time that the pack cementation time finishes, close resistance furnace, while being cooled to 100 DEG C with resistance furnace, stop passing into argon gas; Open fire door and take out sample, make the 4th sample;
(E) the 4th sample is put into alcohol through ultrasonic cleaning after 10 minutes, natural air drying, obtains the Mo-Si-B coating being impregnated with on Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate surface.
The thickness of the Mo-Si-B coating of the 5th sample making through embodiment 3 is 138 μ m, and skin is MoSi
2+ B disperse phase layer, thickness is 111 μ m, and internal layer is Mo layer, and thickness is 27 μ m.
The 5th sample that embodiment 3 is made carries out high temperature oxidation experiment test, and the weightening finish of coatingsurface unit surface is 1.33mg/cm
2, with matrix phase contrast, its unit surface weightening finish has reduced about 188.75mg/cm
2, prove that the cated matrix of preparation has better high temperature oxidation resistance.
Claims (7)
1. the Mo-Si-B coating on niobium-base alloy, is characterized in that: described Mo-Si-B coating refers to the Mo layer with niobium-base alloy substrate contact, and is distributed in the MoSi outside Mo layer
2+ B disperse phase layer.
2. the Mo-Si-B coating on niobium-base alloy according to claim 1, is characterized in that: described Mo-Si-B coating forms SiO after 1250 DEG C of oxidations
2-B
2o
3zone of oxidation, and B
2o
3can reduce SiO
2viscosity, improve mobility, thereby the function of performance crackle self-healing prevents that niobium-base alloy matrix is oxidized effectively.
3. the Mo-Si-B coating on niobium-base alloy according to claim 1, is characterized in that: described Mo-Si-B coating has formed the thick zone of oxidation of 5～10 μ m after 1250 DEG C of oxidations.
4. a preparation method for the Mo-Si-B coating on niobium-base alloy, is characterized in that including the following step:
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6～2.0;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～20min, obtain the second sample;
Second step: plasma spray coats Mo layer
The second sample, through air plasma spraying Mo layer processed, is obtained to the 3rd sample;
The particle diameter of Mo powder is 75～150 μ m;
Air plasma spraying processing parameter: the electric current of air plasma spraying is that 450 A, voltage are that 65 V, argon flow amount are that 60 l/min, hydrogen flowing quantity are 20 l/min; Spray distance is that 80～100 mm, powder feeding rate are 20～25 g/min; In deposition process, matrix surface medial temperature is 300～400 DEG C;
The 3rd step: Si-B embedding bleed processed
100g embedding bleed processed is that 100 object NaF powder, 20.0～36.0g granularity are that 100 object Si powder, 0.6～1.1g granularity are that 400 object B powder and surplus granularity are 100 object Al by 1.2～2.1g granularity
2o
3powder composition;
The 4th step: adopt pack cementation technique to prepare Si-B coating
(A) the embedding bleed the 3rd step being made is put into crucible bottom, then the 3rd sample after treatment in second step is put into crucible middle part, and fill up the embedding bleed of surplus in its surrounding, cover after crucible lid sealing, form heat treated sample, and heat treated sample is inserted in resistance furnace;
(B) temperature rise rate that resistance furnace is set is 3～7 DEG C/min, 950 DEG C～1050 DEG C of pack cementation temperature, pack cementation time 45～55h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min～150 ml/min; Under argon shield, ooze Si-B material;
(D) in the time that the pack cementation time finishes, close resistance furnace, while being cooled to 100 DEG C with resistance furnace, stop passing into argon gas; Open fire door and take out sample, make the 4th sample;
(E) the 4th sample is put into alcohol and after 10～20 minutes, taken out natural air drying through ultrasonic cleaning, obtain the Mo-Si-B coating being impregnated with on Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate surface.
5. the preparation method of the Mo-Si-B coating on niobium-base alloy according to claim 4, is characterized in that: on Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate, being shaped with internal layer is Mo layer, the outer MoSi of being
2the disperse phase layer of+B.
6. the preparation method of the Mo-Si-B coating on niobium-base alloy according to claim 4, is characterized in that: the Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate that surface is impregnated with Mo-Si-B coating can form continuous, fine and close SiO in the time of 1250 DEG C of oxidations
2-B
2o
3zone of oxidation, and B
2o
3can reduce SiO
2viscosity, improve mobility, thereby the function of performance crackle self-healing prevents that Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate is oxidized effectively.
7. the preparation method of the Mo-Si-B coating on niobium-base alloy according to claim 4, is characterized in that: surface is impregnated with the Nb-16Si-22Ti-17Cr-2Al-2Hf alloy substrate of Mo-Si-B coating after 1250 DEG C of oxidations, has the Mo of 5～10 μ m
5si
3zone of oxidation.
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| CN104561882A (en) * | 2015-01-30 | 2015-04-29 | 中国钢研科技集团有限公司 | High-temperature oxidation resistant coating on niobium alloy surface and preparation method of high-temperature oxidation resistant coating |
| CN106048488A (en) * | 2016-06-21 | 2016-10-26 | 西安理工大学 | Method of preparing high-temperature oxidation-resistant coating on surface of refractory metal material |
| CN107208248A (en) * | 2014-12-03 | 2017-09-26 | 赛峰航空器发动机 | The method that manufacture is coated with the part of protective coating |
| CN107790730A (en) * | 2017-10-20 | 2018-03-13 | 北京航空航天大学 | A kind of method that high-temperature oxidation resistant coating is prepared in Nb Si based alloys |
| CN107904544A (en) * | 2017-11-08 | 2018-04-13 | 宝鸡文理学院 | A kind of preparation method of refractory metal surfaces antioxidant coating |
| CN108034922A (en) * | 2017-12-14 | 2018-05-15 | 西北有色金属研究院 | Refractory metal surfaces B is modified MoSi2The penetration enhancer and coating production of coating |
| CN108149201A (en) * | 2018-01-09 | 2018-06-12 | 中南大学 | A kind of Mo-Si-X-C complex phase ceramic coatings and preparation method |
| CN112662989A (en) * | 2020-12-11 | 2021-04-16 | 华侨大学 | Preparation method of refractory metal silicon-boron coating |
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