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A 1200°C complete anti-oxidation binary trace active element-doped ptnial bonding layer and its preparation method

An active element and bonding layer technology, applied in the field of new thermal barrier coating bonding layer materials and their preparation, can solve problems such as affecting adhesion, improve bonding force, improve life, precisely control film thickness and uniformity sexual effect

Active Publication Date: 2016-06-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, NiAl directly used as the bonding layer has some disadvantages. The NiAl coating forms a large number of voids during high temperature oxidation. The voids limit the contact between the metal and the film at the interface between the metal and the oxide film. The interface voids are an important factor affecting the adhesion.

Method used

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  • A 1200°C complete anti-oxidation binary trace active element-doped ptnial bonding layer and its preparation method
  • A 1200°C complete anti-oxidation binary trace active element-doped ptnial bonding layer and its preparation method
  • A 1200°C complete anti-oxidation binary trace active element-doped ptnial bonding layer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: A PtNiAl coating doped with binary trace active elements Hf and Zr was deposited on a N5 nickel-based single crystal superalloy substrate.

[0033] Step 1: Prepare the base material

[0034] The base material used is N5 nickel-based single crystal superalloy, and the base alloy is cut into specifications of 10×8×3mm by wire cutting. 3 Cut a hole with a diameter of 1mm at both ends of the sample, so that the sample can be hung on the bracket when preparing the coating. Then use 320#, 600#, and 800# water-grinding paper to grind all the six sides of the substrate in turn, so that the surface roughness of the substrate is Ra<0.8, fillet all 12 edges, and finally grind The good substrate samples were ultrasonically cleaned with absolute ethanol and acetone for 15 minutes in turn, dried and set aside.

[0035] Step 2: Electroplating or electron beam physical vapor deposition of Pt layer on the substrate

[0036] (A) If the Pt layer is prepared by electroplati...

Embodiment 2

[0049] Example 2 : Deposit binary trace active element Hf, Zr doped PtNiAl coating on IC211 nickel-based single crystal superalloy substrate.

[0050] Step 1: Prepare the base material

[0051] The matrix alloy used is IC211 nickel-based single crystal superalloy, and the matrix alloy is cut into specifications of 10×8×3mm by wire cutting. 3 Cut a hole with a diameter of 1mm at both ends of the sample, so that the sample can be hung on the bracket when preparing the coating. Then use 320#, 600#, and 800# water-grinding paper to grind all the six sides of the substrate in turn, so that the surface roughness of the substrate is Ra<0.8, fillet all 12 edges, and finally grind The good substrate samples were ultrasonically cleaned with absolute ethanol and acetone for 15 minutes in turn, dried and set aside.

[0052] Step 2: Electroplating or electron beam physical vapor deposition of Pt layer on the substrate

[0053] (A) If the Pt layer is prepared by electroplating:

[005...

Embodiment 3

[0066] Example 3: A PtNiAl coating doped with binary trace active elements Hf and Zr was deposited on a DD6 nickel-based single crystal superalloy substrate.

[0067] Step 1: Prepare the base material

[0068] The alloy matrix used is DD6 nickel-based single crystal superalloy, and the matrix alloy is cut into specifications of 10×8×3mm by wire cutting method 3 Cut a hole with a diameter of 1mm at both ends of the sample, so that the sample can be hung on the bracket when preparing the coating. Then use 320#, 600#, and 800# water-grinding paper to grind all the six sides of the substrate in turn, so that the surface roughness of the substrate is Ra<0.8, fillet all 12 edges, and finally grind The good substrate samples were ultrasonically cleaned with absolute ethanol and acetone for 15 minutes in turn, dried and set aside.

[0069] Step 2: Electroplating or electron beam physical vapor deposition of Pt layer on the substrate

[0070] (A) If the Pt layer is prepared by ele...

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Abstract

The present invention discloses a Pt Ni Al bonding layer doped with binary trace active elements and capable of being completely oxidation resisting at 1200 DEG C and a preparation method thereof and belongs to the field of novel thermal barrier coatings and the preparation technologies. According to the invention, firstly, a Pt layer with the thickness of 5-10 microns is prepared on a nickel base monocrystal high temperature alloy matrix through the plating or the electron beam physical vapor deposition method, and then a NiAlHfZr coating with the thickness of 20-60 microns is deposited on the Pt layer through the electron beam physical vapor deposition method. The Pt layer reduces the interfacial holes and effectively improves the adhesion of an oxidation film; binary doping of Hf, Zr enables the NiAl coating surface to be smoother and denser and enables the oxidation film generated during the oxidation process on the coating surface to be straighter, especially with little oxidation increase, and greatly improves the oxidation resistance of the coating. The Pt Ni Al bonding layer is completely oxidation resisting at 1200 DEG C. The service life of the coating is prolonged to certain degree through doping of binary elements namely Hf and Zr and Pt modification.

Description

technical field [0001] The present invention relates to a new type of thermal barrier coating adhesive layer material and its preparation method, more specifically refers to the preparation of a nickel-based single crystal superalloy, 1200 ℃ completely resistant Oxidized binary trace active element doped PtNiAl coatings. Background technique [0002] Thermal barrier coatings have been applied to the surface of nickel-based single crystal superalloy blades of gas turbines and aero-engines to protect them from heat due to their excellent properties of heat insulation, high temperature resistance, oxidation corrosion resistance and wear resistance. The typical structure of thermal barrier coatings for turbine blades in practice adopts a double-layer structure, that is, a ceramic layer and a metal bonding layer. The bonding layer is to alleviate the thermal mismatch between the ceramic layer and the alloy substrate, and at the same time to improve the high temperature oxidation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C23C14/30C21D1/773C22C19/03C22C21/00
Inventor 郭洪波贾芳彭徽宫声凯徐惠彬
Owner BEIHANG UNIV
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