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Active-element Sc-modified (Ni, Pt)Al high-temperature-oxidation-resisting bonding layer material and preparation method thereof

A technology that resists high temperature oxidation and active elements, applied in metal material coating process, coating, ion implantation plating and other directions, can solve the problems of poor adhesion of oxide film, easy peeling, coating failure, etc., to reduce the oxidation rate , the effect of eliminating interface holes and improving adhesion

Inactive Publication Date: 2014-03-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion of the oxide film on the surface of the NiAl coating is poor, and it is easy to peel off in a high-temperature cyclic oxidation environment, and the top layer of the heat-insulating ceramic connected to the NiAl coating also peels off, which eventually leads to the failure of the coating.

Method used

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  • Active-element Sc-modified (Ni, Pt)Al high-temperature-oxidation-resisting bonding layer material and preparation method thereof
  • Active-element Sc-modified (Ni, Pt)Al high-temperature-oxidation-resisting bonding layer material and preparation method thereof
  • Active-element Sc-modified (Ni, Pt)Al high-temperature-oxidation-resisting bonding layer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: 0.05at.%Sc modified NiAl and its modified (Ni,Pt)Al coating

[0043] According to the nominal composition is Ni 49.975 al 49.975 sc 0.05 For batching, the purity of the raw materials nickel, aluminum and scandium is 99.99% by mass.

[0044] Vacuum arc melting Ni 49.975 al 49.975 sc 0.05 Ingot, vacuum degree 1×10 -3 Pa, the current is 700A, and the ingot is turned over 4 times to ensure uniform melting. Carry out vacuum homogenization annealing treatment on the ingot: heat treatment at 1300°C for 24h, vacuum degree is 9.2×10 -3 Pa.

[0045] Cut the ingot to 10×8×3mm by wire cutting 3 The rectangular pieces were smoothed with sandpaper, then ultrasonically cleaned in acetone and absolute ethanol for 15 minutes and dried. Record the surface area and initial weight of the sample. After cyclic oxidation at 1200℃ for 100h, the average oxidation weight gain of NiAl-0.05Sc is 0.98mg / cm 2 , which is only 24% of the oxidation weight gain of the NiAl alloy...

Embodiment 2

[0053] Example 2: 0.1at.%Sc modified NiAl and its modified (Ni,Pt)Al coating

[0054] According to the nominal composition is Ni 49.95 al 49.95 sc 0.1 For batching, the purity of the raw materials nickel, aluminum and scandium is 99.99%.

[0055] Vacuum arc melting Ni 49.95 al 49.95 sc 0.1 Ingot, vacuum degree is 5×10 -4Pa, the current is 850A, and the ingot is turned over 4 times to ensure uniform melting. Carry out vacuum homogenization annealing treatment on the ingot: heat treatment at 1300°C for 24h, vacuum degree is 9.2×10 -3 Pa.

[0056] Cut the ingot to 10×8×3mm by wire cutting 3 The rectangular pieces were smoothed with sandpaper, then ultrasonically cleaned in acetone and absolute ethanol for 15 minutes and dried. Record the surface area and initial weight of the sample. After cyclic oxidation at 1200℃ for 100h, the average oxidation weight gain of NiAl-0.1Sc is 1.24mg / cm 2 , which is only 30% of the oxidation weight gain of the NiAl alloy (see figure ...

Embodiment 3

[0064] Example 3: 0.3at.%Sc modified NiAl and its modified (Ni,Pt)Al coating

[0065] According to the nominal composition is Ni 49.85 al 49.85 sc 0.3 For batching, the purity of the raw materials nickel, aluminum and scandium is 99.99%.

[0066] Vacuum arc melting Ni 49.85 al 49.85 sc 0.3 Ingot, vacuum degree is 5×10 -4 Pa, the current is 1000A, and the ingot is turned over 4 times to ensure uniform melting. Carry out vacuum homogenization annealing treatment on the ingot: heat treatment at 1300°C for 24h, vacuum degree is 9.2×10 -3 Pa.

[0067] Cut the ingot to 10×8×3mm by wire cutting 3 The rectangular pieces were smoothed with sandpaper, then ultrasonically cleaned in acetone and absolute ethanol for 15 minutes and dried. Record the surface area and initial weight of the sample. After cyclic oxidation at 1200℃ for 100h, the average oxidation weight gain of NiAl-0.3Sc is 2.31mg / cm 2 , which is only nearly half of the oxidation weight gain of NiAl alloys (see ...

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Abstract

The invention discloses an active-element Sc-modified (Ni, Pt) Al high-temperature-oxidation-resisting bonding layer material and a preparation method thereof and belongs to the technical field of thermal barrier coatings. Electroplating and electron beam physical vapor deposition methods are adopted to prepare an Sc-modified (Ni, Pt) Al coating on nickel-base superalloy. The bonding layer material can be applied for a long time in the environment with the temperature more than 1150 DEG C. Compared with unmodified NiAl, the bonding layer material has the advantages that after Sc is doped, the oxidation rate of (Ni, Pt) Al is obviously reduced, the adhesion of an oxidation film is improved, and the peeling situation is inhibited; the oxidation film / Ni Al interface becomes straight, and holes in the interface are eliminated; the bonding layer material has high resistance to high temperature oxidation and can be used as the bonding layer material of a high-temperature-resisting thermal barrier coating. The preparation method respectively adopts the electroplating method to prepare a Pt layer and adopts the electron beam physical vapor deposition method to prepare the Sc-modified (Ni, Pt) Al coating, can precisely control the thickness and chemical components of the coating by regulating various parameters, and makes up for the deficiencies of a pack cementation method for preparing the (Ni, Pt) Al coating.

Description

technical field [0001] The invention relates to a material that can be used as a bonding layer in a thermal barrier coating, specifically refers to (Ni, Pt) Al modified with active element Sc (scandium) that can be applied in a high temperature environment of 1200 ° C to resist high temperature Oxidized bondline material. Background technique [0002] Thermal barrier coatings (Thermal barrier coatings, TBCs) is a key technology applied to high-performance aero-engines, generally by Y 2 o 3 Partially stabilized ZrO 2 Composed of thermal insulation ceramic top layer and MCrAlY (M is Ni, Co or Ni+Co) anti-oxidation bonding layer. In recent years, with the continuous development of aero-engines in the direction of high flow ratio and high thrust-to-weight ratio, the design inlet temperature of aero-engines with a thrust-to-weight ratio of 10 exceeds 1600 °C, while the design inlet temperature of advanced aero-engines with a thrust-to-weight ratio of 15 or more Will exceed 17...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10C23C14/02C23C14/16C23C14/30
Inventor 郭洪波王璐程玉贤王迪宫声凯徐惠彬
Owner BEIHANG UNIV
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