CN103060747B - Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process - Google Patents
Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process Download PDFInfo
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Abstract
The invention discloses a method for preparing a Y modified CoAlNi coating on an Ni-based high temperature alloy by an embedding infiltration process. The thickness of the CoAlNiY coating is between 10 and 30 mu m. The CoAlNiY coating only comprises an Al0.9 Ni1.1 phase, wherein partial Ni atoms are replaced by Co atoms, and Y atoms exist in the Al0.9 Ni1.1 phase in the form of placeholder solid solution. Continuous and dense Al2O3 oxide layers can be formed on the prepared CoAlNiY coating C when the CoAlNiY coating is subjected to high-temperature cycle oxidation at the temperature of 1,050 DEG, so that the coating and a substrate can be prevented from being further oxidized, and the high-temperature cycle oxidation resistance of the substrate is improved. The CoAlNiY coating has higher thermal corrosion resistance at the high temperature of between 850 and 950 DEG C.
Description
Technical field
The present invention relates to a kind of high temperature coating, more particularly, refer to a kind of method that adopts pack cementation technique to prepare Y modification CoAlNi coating on Ni based high-temperature alloy.
Background technology
Nickel base superalloy at high temperature has the higher performance such as physical strength and creep resistance conventionally, and this makes it be widely used in the hot-end component such as aero-jet engine, various industrial gas turbines, such as engine blade.But conventionally can reduce the performances such as the anti-oxidant and corrosion and heat resistant of superalloy in order to improve the element that alloy high-temp intensity adds.The effective measure that address this problem are to prepare high-temperature protection coating at alloy surface, many scientific research personnel have done a large amount of research, such as alloy surface aluminising, aluminising silicon, chromising silicon, aluminising hafnium etc., result of study shows, these coatings can more effectively be improved Alloy Anti oxidation and hot corrosion resistance.In order further to carry heavy alloyed high temperature resistance cyclic oxidation and hot corrosion resistance, CoAlNiY coating is the potential new coating of a kind of tool.
Summary of the invention
The object of the invention is to propose a kind of method that adopts pack cementation method to prepare Y modification CoAlNi coating on Ni based high-temperature alloy, by at high temperature producing the active atomic of Co, Al and Y, make the active atomic of Co, Al and Y be diffused into matrix inside, thereby generate coating.Between coatingsurface and matrix, have diffusion layer.The described CoAlNiY coat-thickness making is 10 μ m～30 μ m, and CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.
The present invention is a kind of method that adopts pack cementation technique to prepare Y modification CoAlNi coating on Ni based high-temperature alloy, and it includes the following step:
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
Second step: embedding bleed processed
100g embedding bleed processed is that 100 object Al powder, 15～25g granularity are that 100 object Co powder, 1～3g granularity are 100 object Y by 6～8g granularity
2o
3powder, 3～5g granularity are that 100 object NH4Cl powder, 3～5g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
2o
3powder composition;
The 3rd step: adopt pack cementation technique to prepare Y modification CoAlNi coating
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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, 1000 DEG C～1100 DEG C of pack cementation temperature, pack cementation time 5～12h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min～150ml/min;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 10～20 minutes, cold wind dries up, and obtains the CoAlNiY coating being impregnated with on Ni based high-temperature alloy surface.
Adopt the advantage of the CoAlNiY coating that pack cementation technique of the present invention makes to be:
1. utilize the hot chemical treatment method of pack cementation technique, make embedding bleed at the active atomic that produces Co, Al and Y, make the active atomic of Co, Al and Y be diffused into matrix inside, thereby generate coating.Between coatingsurface and matrix, have diffusion layer.
2. utilizing thermal resistance stove to carry out the CoAlNiY coat-thickness that thermo-chemical treatment makes is 10 μ m～30 μ m, and CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.Technique is controlled, production cost is low.
3. the CoAlNiY coating making can form continuous, fine and close Al in the time of 1050 DEG C of cyclic oxidations of high temperature
2o
3oxide skin, thus the further oxidized of coatings and substrate stoped, improve the high temperature resistance cyclic oxidation performance of Ni based high-temperature alloy matrix.
4. the CoAlNiY coating of preparation is carried out high temperature corrosion test in the etching reagent of the sodium-chlor composition of 75% sodium sulfate and 25%: under the condition of 900 DEG C～950 DEG C of temperature, corrode after 100～200 hours, observe sample, its surfacing, nothing are peeled off, and illustrate that CoAlNiY coating has good hot corrosion resistance.
Brief description of the drawings
Fig. 1 is the schematic diagram that adopts the inventive method CoAlNiY coating processed on matrix.
Fig. 2 is the SEM photo of the CoAlNiY coating that makes of embodiment 1.
Fig. 3 is the XRD figure of the CoAlNiY coating that makes of embodiment 1.
Fig. 4 is that the 3rd sample and DZ125 alloy carry out cyclic oxidation weightening finish curve.
Fig. 5 is the SEM photo after the CoAlNiY coating cyclic oxidation that makes of embodiment 1.
Fig. 6 is the XRD figure after the CoAlNiY coating cyclic oxidation that makes of embodiment 1.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
CoAlNiY coating of the present invention only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.Made CoAlNiY coat-thickness is 10 μ m～30 μ m.
The present invention is a kind of method that adopts pack cementation technique to prepare Y modification CoAlNi coating on Ni 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#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
Second step: embedding bleed processed
100g embedding bleed processed is that 100 object Al powder, 15～25g granularity are that 100 object Co powder, 1～3g granularity are 100 object Y by 6～8g granularity
2o
3powder, 3～5g granularity are 100 object NH
4cl powder, 3～5g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
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 NH
4cl powder and NH
4i powder can with Al powder, Co powder and Y
2o
3powder reaction, forms corresponding gaseous compound, only has this compound just can produce the active atomic of Al, Co and Y, penetrates into Ni based high-temperature alloy surface.
The 3rd step: adopt pack cementation technique to prepare CoAlNiY coating
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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, 1000 DEG C～1100 DEG C of pack cementation temperature, pack cementation time 5～12h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min～150ml/min; CoAlNiY coating processed under argon shield;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 10～20 minutes, cold wind dries up, and obtains the CoAlNiY coating being impregnated with on Ni based high-temperature alloy surface.
CoAlNiY coating prepared by aforesaid method is carried out composition and facies analysis through SEM and XRD.Its structure is shown in Figure 1, is diffusion layer on matrix, and outermost is CoAlNiY coating.
embodiment 1:
Matrix is selected Ni-6.2Co-8.9Cr-7.0W-6.1Al-3.8Ta-2.0Mo-1.5Hf-1.0Ti(trade mark DZ125).
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
Second step: embedding bleed processed
100g embedding bleed processed is that 100 object Al powder, 20g granularity are that 100 object Co powder, 2g granularity are 100 object Y by 7.6g granularity
2o
3powder, 4g granularity are 100 object NH
4cl powder, 4g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
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 NH
4cl and NH
4i powder can with Al powder, Co powder and Y
2o
3powder reaction, forms corresponding gaseous compound, only has this compound just can produce the active atomic of Al, Co and Y, penetrates into Ni based high-temperature alloy surface.
The 3rd step: adopt pack cementation technique to prepare CoAlNiY coating
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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, 1050 DEG C of pack cementation temperature, pack cementation time 10h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 100ml/min; CoAlNiY coating processed under argon shield;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 15 minutes, cold wind dries up, and obtains the CoAlNiY coating being impregnated with on Ni based high-temperature alloy surface.
CoAlNiY coating prepared by embodiment 1 through SEM(as Fig. 2) and XRD(as Fig. 3) analyze show, CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.Find by power spectrum, the composition of diffusion layer is 13Al-20Co-46.4Ni-3Mo-8.5Cr-8W-1.1Y, and thickness is about 16.7 μ m.In Fig. 2, can observe the structure that matrix has diffusion layer and CoAlNiY coating after pack cementation is processed.In Fig. 3, can find out that CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.
Because CoAlNiY coating will be worked under the condition such as Thermal cycle oxidation and thermal etching, these all likely cause coating to lose efficacy.Therefore, the object of Thermal cycle oxidation experiment is reaction kinetics and the oxidation mechanism of research metal or alloy under cyclic oxidation reaction conditions.Wherein the simplest method is that the sample of a known quality and surface-area is placed on and in process furnace, is oxidized certain hour, taken out and cooling after weigh, then again put into process furnace and be oxidized certain hour, taken out and cooling after again weigh, so repeatedly, change and can determine degree of oxidation according to sample mass.Pattern, the structure and composition of specimen surface oxide film can carry out observation and analysis with various X-rays and Metallographic Techniques.
In the present invention, Thermal cycle oxidation test temperature is 1050 DEG C, the 3rd sample prepared by aforesaid method is placed in high temperature process furnances and carries out Thermal cycle oxidation processing, Fig. 4 is that the 3rd sample and DZ125 alloy carry out cyclic oxidation weightening finish curve, as can be seen from the figure with respect to DZ125 alloy substrate, the 3rd sample has better high temperature resistance cyclic oxidation performance.After cyclic oxidation, measuring sample mass changes and adopts XRD, SEM observation and analysis composition.
Coatingsurface after cyclic oxidation through SEM(as Fig. 5) and XRD(as Fig. 6) analysis shows that coatingsurface has formed the Al of continuous densification
2o
3oxide skin, thus effectively stop in cyclic oxidation process oxygen to the diffusion of matrix.In Fig. 5, can observe at CoAlNiY coatingsurface and form one deck oxide skin of densification continuously.This oxide skin is learnt as Al by XRD analysis
2o
3oxide compound, as shown in Figure 6.
CoAlNiY coating prepared by embodiment 1 is carried out high temperature corrosion test in the etching reagent of the sodium-chlor composition of 75% sodium sulfate and 25%: under the condition of 900 DEG C of temperature, corrode after 200 hours, observe sample, its surfacing, nothing are peeled off, and illustrate that the CoAlNiY coating of preparing through pack cementation method of the present invention has good hot corrosion resistance.
embodiment 2:
Matrix is selected Ni-10Co-9Cr-12W-5Al-1.5Hf-2Ti(trade mark DZ22).
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
Second step: embedding bleed processed
100g embedding bleed processed is that 100 object Al powder, 15g granularity are that 100 object Co powder, 3g granularity are 100 object Y by 6g granularity
2o
3powder, 5g granularity are 100 object NH
4cl powder, 5g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
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 NH
4cl powder and NH
4i powder can with Al powder, Co powder and Y
2o
3powder reaction, forms corresponding gaseous compound, only has this compound just can produce the active atomic of Al, Co and Y, penetrates into Ni based high-temperature alloy surface.
The 3rd step: adopt pack cementation technique to prepare CoAlNiY coating
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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, 1000 DEG C of pack cementation temperature, pack cementation time 12h
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 80ml/min; CoAlNiY coating processed under argon shield;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 10 minutes, cold wind dries up, and obtains the CoAlNiY coating being impregnated with on Ni based high-temperature alloy surface.
CoAlNiY coating prepared by embodiment 2 shows through SEM and XRD analysis, and CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.Find by power spectrum, the composition of diffusion layer is 24Al-14Co-28Ni-7Cr-25W-2Y, and thickness is about 17.1 μ m.
CoAlNiY coating prepared by embodiment 2 is carried out high temperature corrosion test in the etching reagent of the sodium-chlor composition of 75% sodium sulfate and 25%: under the condition of 950 DEG C of temperature, corrode after 100 hours, observe sample, its surfacing, nothing are peeled off, and illustrate that the CoAlNiY coating of preparing through pack cementation method of the present invention has good hot corrosion resistance.
embodiment 3:
Matrix is selected Ni-5Co-11Cr-5W-5.5Al-4.1Mo-2.5Ti(trade mark K403).
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
Second step: embedding bleed processed
100g embedding bleed processed is that 100 object Al powder, 25g granularity are that 100 object Co powder, 1g granularity are 100 object Y by 8g granularity
2o
3powder, 3g granularity are 100 object NH
4cl powder, 3g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
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 NH
4cl powder and NH
4i powder can with Al powder, Co powder and Y
2o
3powder reaction, forms corresponding gaseous compound, only has this compound just can produce the active atomic of Al, Co and Y, penetrates into Ni based high-temperature alloy surface.
The 3rd step: adopt pack cementation technique to prepare CoAlNiY coating
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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 4 DEG C/min, 1100 DEG C of pack cementation temperature, pack cementation time 8h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min; CoAlNiY coating processed under argon shield;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 15 minutes, cold wind dries up, and obtains the CoAlNiY coating being impregnated with on Ni based high-temperature alloy surface.
CoAlNiY coating prepared by embodiment 3 shows through SEM and XRD analysis, and CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.Find by power spectrum, the composition of diffusion layer is 25.3Al-10Co-37.5Ni-3.5Mo-7Cr-16W-0.7Y, and thickness is about 16.4 μ m.
CoAlNiY coating prepared by embodiment 3 is carried out high temperature corrosion test in the etching reagent of the sodium-chlor composition of 75% sodium sulfate and 25%: under the condition of 900 DEG C of temperature, corrode after 200 hours, observe sample, its surfacing, nothing are peeled off, and illustrate that the CoAlNiY coating of preparing through pack cementation method of the present invention has good hot corrosion resistance.
embodiment 4:
Matrix is selected Ni-15Co-9Cr-5.3Al-3Mo-1.8Hf-4.8Ti(trade mark K417).
The first step: the pre-treatment of matrix
(A) with the SiC silicon carbide paper of 800#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
The surfaceness of the first sample is Ra=1.6;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
Second step: embedding bleed processed
100g embedding bleed processed is that 100 object Al powder, 20g granularity are that 100 object Co powder, 2g granularity are 100 object Y by 7g granularity
2o
3powder, 5g granularity are 100 object NH
4cl powder, 5g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
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 NH
4cl powder and NH
4i powder can with Al powder, Co powder and Y
2o
3powder reaction, forms corresponding gaseous compound, only has this compound just can produce the active atomic of Al, Co and Y, penetrates into Ni based high-temperature alloy surface.
The 3rd step: adopt pack cementation technique to prepare CoAlNiY coating
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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 6 DEG C/min, 1050 DEG C of pack cementation temperature, pack cementation time 10h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 120ml/min; CoAlNiY coating processed under argon shield;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 20 minutes, cold wind dries up, and obtains the CoAlNiY coating being impregnated with on Ni based high-temperature alloy surface.
CoAlNiY coating prepared by embodiment 4 shows through SEM and XRD analysis, and CoAlNiY coating only has Al
0.9ni
1.1phase, wherein part Ni atom is substituted by Co atom, and Y atom is present in Al with the form of occupy-place solid solution
0.9ni
1.1xiang Zhong.Find by power spectrum, the composition of diffusion layer is 25Al-12Co-47.3Ni-8Mo-6.5Cr-1.2Y, and thickness is about 17.5 μ m.
CoAlNiY coating prepared by embodiment 4 is carried out high temperature corrosion test in the etching reagent of the sodium-chlor composition of 75% sodium sulfate and 25%: under the condition of 900 DEG C of temperature, corrode after 150 hours, observe sample, its surfacing, nothing are peeled off, and illustrate that the CoAlNiY coating of preparing through pack cementation method of the present invention has good hot corrosion resistance.
The CoAlNiY coating that employing the inventive method is made can form continuous, fine and close Al in the time of 1050 DEG C of cyclic oxidations of high temperature
2o
3oxide skin, thus the further oxidized of coatings and substrate stoped, improve the high temperature resistance cyclic oxidation performance of Ni based high-temperature alloy matrix.Because the CoAlNiY coating layer portion Ni atom making is substituted by Co atom, thus this coating at high temperature (900 DEG C～950 DEG C) also there is good hot corrosion resistance.
Claims (4)
1. adopt pack cementation technique on Ni based high-temperature alloy, to prepare a method for Y modification CoAlNi coating, described pack cementation technique includes the pre-treatment of the matrix of the first step;
(A) with the SiC silicon carbide paper of 800#, Ni based high-temperature alloy is carried out to surface grinding processing, make the first sample;
(B) the first sample is put into dehydrated alcohol and carried out after ultrasonic cleaning 10～15min, obtain the second sample;
The embedding bleed processed of second step;
The employing pack cementation technique of the 3rd step is prepared coating;
It is characterized in that:
Described embedding bleed, 100g embedding bleed processed is that 100 object Al powder, 15～25g granularity are that 100 object Co powder, 1～3g granularity are 100 object Y by 6～8g granularity
2o
3powder, 3～5g granularity are 100 object NH
4cl powder, 3～5g granularity are 100 object NH
4i powder and surplus granularity are 100 object Al
2o
3powder composition;
Described pack cementation technique is prepared Y modification CoAlNi coating:
(A) embedding bleed second step being made is put into crucible bottom, then the second sample after treatment in the first 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, 1000 DEG C～1100 DEG C of pack cementation temperature, pack cementation time 5～12h;
(C) opening resistor stove, passes into argon gas; The mass percent purity of described argon gas is 99.0%, flow 60ml/min～150ml/min;
(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 3rd sample;
(E) the 3rd sample is put into alcohol through ultrasonic cleaning after 10～20 minutes, cold wind dries up, and obtains being impregnated with on Ni based high-temperature alloy surface 10 CoAlNiY coatings μ m～30 μ m thickness, Y modification CoAlNi.
2. employing pack cementation technique according to claim 1 is prepared the method for Y modification CoAlNi coating on Ni based high-temperature alloy, it is characterized in that: the CoAlNiY coating making only has Al
0.9ni
1.1phase.
3. employing pack cementation technique according to claim 1 is prepared the method for Y modification CoAlNi coating on Ni based high-temperature alloy, it is characterized in that: the CoAlNiY coating making can form continuous, fine and close Al in the time of 1050 DEG C of cyclic oxidations of high temperature
2o
3oxide skin.
4. employing pack cementation technique according to claim 1 is prepared the method for Y modification CoAlNi coating on Ni based high-temperature alloy, it is characterized in that: the CoAlNiY coating making is carried out high temperature corrosion test in the etching reagent of the sodium-chlor composition of 75% sodium sulfate and 25%: under the condition of 900 DEG C～950 DEG C of temperature, corrode after 100～200 hours, observe sample, its surfacing, nothing are peeled off.
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| CN104120426A (en) * | 2014-07-25 | 2014-10-29 | 北京航空航天大学 | Mo-Si-B coating on niobium-based alloy and preparation method of Mo-Si-B coating |
| CN104233280A (en) * | 2014-08-28 | 2014-12-24 | 长春东基材料科技有限公司 | Method for plating titanium boron carbonitride (Ti(B, C, N) ceramic thin film on surface of substrate |
| CN105839048B (en) * | 2016-04-08 | 2018-06-19 | 北方民族大学 | A kind of high temperature alloy oxidation and corrosion protective coating and penetration enhancer |
| CN106048488B (en) * | 2016-06-21 | 2019-05-24 | 西安理工大学 | A method of high-temperature oxidation resistant coating is prepared on refractory metal material surface |
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| US3999956A (en) * | 1975-02-21 | 1976-12-28 | Chromalloy American Corporation | Platinum-rhodium-containing high temperature alloy coating |
| JPS59205468A (en) * | 1983-05-10 | 1984-11-21 | Natl Res Inst For Metals | high temperature corrosion resistant material |
| US4933239A (en) * | 1989-03-06 | 1990-06-12 | United Technologies Corporation | Aluminide coating for superalloys |
| US6533875B1 (en) * | 2000-10-20 | 2003-03-18 | General Electric Co. | Protecting a surface of a nickel-based article with a corrosion-resistant aluminum-alloy layer |
| DE102005053531A1 (en) * | 2005-11-08 | 2007-05-10 | Man Turbo Ag | Heat-insulating protective layer for a component within the hot gas region of a gas turbine |
| US20100170593A1 (en) * | 2007-01-15 | 2010-07-08 | Toshio Narita | Oxidation resistant alloy coating film, method of producing an oxidation resistant alloy coating film, and heat resistant metal member |
| CN101942635B (en) * | 2010-09-09 | 2011-11-30 | 西北工业大学 | Aluminum yttrium magnesium co-diffusion powder coating diffusion agent, preparation method and coating method thereof |
| CN102424948B (en) * | 2011-10-24 | 2013-03-13 | 北京航空航天大学 | Method of preparing CoAlNi coating on Ni-based high-temperature alloy through pack cementation |
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