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 PDF

Info

Publication number
CN103060747B
CN103060747B CN201210540509.6A CN201210540509A CN103060747B CN 103060747 B CN103060747 B CN 103060747B CN 201210540509 A CN201210540509 A CN 201210540509A CN 103060747 B CN103060747 B CN 103060747B
Authority
CN
China
Prior art keywords
coating
sample
coalniy
powder
pack cementation
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.)
Expired - Fee Related
Application number
CN201210540509.6A
Other languages
Chinese (zh)
Other versions
CN103060747A (en
Inventor
周春根
乔敏
李海霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beihang University
Original Assignee
Beihang University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beihang University filed Critical Beihang University
Priority to CN201210540509.6A priority Critical patent/CN103060747B/en
Publication of CN103060747A publication Critical patent/CN103060747A/en
Application granted granted Critical
Publication of CN103060747B publication Critical patent/CN103060747B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

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

A kind of method that adopts pack cementation technique to prepare Y modification CoAlNi coating on Ni based high-temperature alloy
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.
CN201210540509.6A 2012-12-13 2012-12-13 Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process Expired - Fee Related CN103060747B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210540509.6A CN103060747B (en) 2012-12-13 2012-12-13 Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210540509.6A CN103060747B (en) 2012-12-13 2012-12-13 Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process

Publications (2)

Publication Number Publication Date
CN103060747A CN103060747A (en) 2013-04-24
CN103060747B true CN103060747B (en) 2014-10-15

Family

ID=48103635

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210540509.6A Expired - Fee Related CN103060747B (en) 2012-12-13 2012-12-13 Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process

Country Status (1)

Country Link
CN (1) CN103060747B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2008088057A1 (en) * 2007-01-15 2008-07-24 Toshio Narita Oxidation-resistant alloy coating film, method for production of 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

Also Published As

Publication number Publication date
CN103060747A (en) 2013-04-24

Similar Documents

Publication Publication Date Title
Yu et al. Influence of the combined-effect of NaCl and Na2SO4 on the hot corrosion behaviour of aluminide coating on Ni-based alloys
Lu et al. Erosion and corrosion behavior of shrouded plasma sprayed Cr3C2-NiCr coating
CN103060747B (en) Method for preparing Y modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process
Schütze et al. Future directions in the field of high-temperature corrosion research
Encinas-Sánchez et al. Corrosion resistance of protective coatings against molten nitrate salts for thermal energy storage and their environmental impact in CSP technology
Wang et al. Oxidation and hot corrosion behaviors of Mo-doped NiMoAlY alloys at 750° C
CN104120426A (en) Mo-Si-B coating on niobium-based alloy and preparation method of Mo-Si-B coating
Vialas et al. Substrate effect on the high-temperature oxidation behavior of a Pt-modified aluminide coating. Part I: influence of the initial chemical composition of the coating surface
Meng et al. Cyclic oxidation behaviour of Co/Si co-doped β-NiAl coating on nickel based superalloys
CN102424948B (en) Method of preparing CoAlNi coating on Ni-based high-temperature alloy through pack cementation
Zielińska et al. Microstructure and oxidation resistance of an aluminide coating on the nickel based superalloy Mar M247 deposited by the CVD aluminizing process
Li et al. Oxidation behaviors and compressive strength evolution of DD6 Ni-based single-crystal superalloy at 1100℃
Xiang et al. Comparative investigation of oxidation behavior and hot corrosion behavior in NaCl–Na2SO4 mixture for a Ti2AlNb based alloy at 1023 K
Barekatain et al. High-temperature oxidation behaviors of plasma electrolytic oxidation coating on hot-dip aluminized HP40Nb alloy
Zhu et al. Study of the effect of laser treatment on the initial oxidation behaviour of Al‐coated NiCrAlY bond‐coat
Zhuo et al. Al-modified environmental barrier coatings for protection against water vapor corrosion
Salehi Doolabi et al. Comparison of Isothermal with cyclic oxidation behavior of “Cr-Aluminide” coating on inconel 738LC at 900 C
Priest et al. Synthesis of clean aluminide coatings on Ni‐based superalloys via a modified pack cementation process
Li et al. Microstructure and hot corrosion behavior of Al-Ce-Y coatings on DZ125 nickel-based alloy prepared by pack cementation process
CN103060748B (en) Method for preparing Hf modified CoAlNi coating on Ni-based high temperature alloy by embedding infiltration process
Zheng et al. Cyclic oxidation behavior of NiCoCrAlY/YSZ@ Ni composite coatings fabricated by laser cladding
Liu et al. Interaction of a near-{alpha} type titanium alloy with NiCrAlY protective coating at high temperatures
Li et al. Influence of Pre-Oxidation on High Temperature Oxidation and Corrosion Behavior of Ni-Based Aluminide Coating in Na2SO4 Salt at 1050 C
Zagula-Yavorska et al. Oxidation behaviour of zirconium-doped NiAl coatings deposited on pure nickel
Yang et al. Cyclic oxidation behavior of Ni 3 Al-based single crystal alloy IC21

Legal Events

Date Code Title Description
C06 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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141015

Termination date: 20151213

EXPY Termination of patent right or utility model