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Preparation method of high-temperature oxidation-resistant ReAl coating

A high-temperature anti-oxidation and coating technology, applied in coating, metal material coating process, ion implantation plating, etc., to achieve good aerodynamic performance, easy control of beam spot size and position, precise control of film thickness and uniformity sexual effect

Inactive Publication Date: 2014-04-02
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of aerospace technology, higher and higher requirements are put forward for high-temperature oxidation resistance and high mechanical properties of materials, but the current high-temperature alloy materials are difficult to meet the requirements under all working conditions. The technology can make up for the shortcomings of a single material, including the application of high-temperature protective coatings such as thermal barrier coatings, which provides a new solution for the loading of materials in high-temperature fields. However, the existing coating systems are difficult to meet the requirements , so it is of great significance to develop new coating systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Melt Re metal and Al metal with an atomic ratio of 1:1 into an alloy rod with a diameter of 68 mm and a length of 200 mm; put the alloy rod into an electron beam physical vapor deposition vacuum chamber, and control the vacuum degree of the vacuum chamber at 2× 10 -2 Pa, deposited at a rate of 0.3μm / min. In order to obtain better bonding strength and coating structure morphology, the substrate temperature was controlled at about 850°C during deposition, and the coating thickness was controlled at about 60μm. After the sample cools down, put it into the furnace for heat treatment in vacuum. The treatment process is as follows: the heating rate is 3°C / min., and the vacuum degree is controlled at (2-5)×10 -2 Pa, heat preservation at 1050°C for 4 hours, and after cooling in the furnace, the required new high-temperature oxidation-resistant coating can be produced.

Embodiment 2

[0016] Melt Re metal and Al metal with an atomic ratio of 1:1 into an alloy rod with a diameter of 70 mm and a length of 220 mm; put the alloy rod into an electron beam physical vapor deposition vacuum chamber, and control the vacuum degree of the vacuum chamber at 2× 10 -2 Pa, deposited at a rate of 0.2 μm / min. In order to obtain better bonding strength and coating structure morphology, the substrate temperature was controlled at about 800 °C during deposition, and the coating thickness was controlled at about 55 μm. After the sample cools down, put it into the furnace for heat treatment in vacuum. The treatment process is as follows: the heating rate is 3°C / min., and the vacuum degree is controlled at (2-5)×10 -2 Pa, heat preservation at 1050°C for 4 hours, and after cooling in the furnace, the required new high-temperature oxidation-resistant coating can be produced.

Embodiment 3

[0018] The Re metal and Al metal with an atomic ratio of 1:1 were smelted into an alloy rod with a diameter of 65 mm and a length of 180 mm; the alloy rod was placed in an electron beam physical vapor deposition vacuum chamber, and the vacuum degree of the vacuum chamber was controlled at 2×10 -2 Pa, deposited at a rate of 0.5 μm / min. In order to obtain better bonding strength and coating structure morphology, the substrate temperature was controlled at about 900 °C during deposition, and the coating thickness was controlled at about 65 μm. After the sample cools down, put it into the furnace for heat treatment in vacuum. The treatment process is as follows: the heating rate is 3°C / min., and the vacuum degree is controlled at (2-5)×10 -2 Pa, heat preservation at 1050°C for 4 hours, and after cooling in the furnace, the required new high-temperature oxidation-resistant coating can be produced.

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Abstract

The invention belongs to the technical field of high-temperature coating preparation, and particularly relates to a preparation method of a high-temperature oxidation-resistant ReAl coating, which comprises the steps of: smelting Re metal and Al metal at an atomic ratio of 1:1 into an alloy rod, placing in an electron beam physical vapor deposition vacuum chamber, preparing the coating by adopting electron beam physical vapor deposition technology, cooling the specimen, and then carrying out heat treatment in vacuum to obtain the high-temperature oxidation-resistant ReAl coating. The coating obtained by the method has good binding force with a substrate, and the obtained structure is the columnar crystal structure; the electron beam power is easy to adjust, the size and position of the beam spot are easy to control, and the thickness and uniformity of the film can be accurately controlled; and the obtained coating has excellent surface roughness and excellent aerodynamic performance.

Description

technical field [0001] The invention belongs to the technical field of high-temperature coating preparation, and in particular relates to a preparation method of a high-temperature oxidation ReAl coating. Background technique [0002] With the development of aerospace technology, higher and higher requirements are put forward for high-temperature oxidation resistance and high mechanical properties of materials, but the current high-temperature alloy materials are difficult to meet the requirements under all working conditions. The technology can make up for the shortcomings of a single material, including the application of high-temperature protective coatings such as thermal barrier coatings, which provides a new solution for the loading of materials in high-temperature fields. However, the existing coating systems are difficult to meet the requirements , so it is of great significance to develop new coating systems. [0003] In order to improve the high-temperature oxidat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/16C23C14/30
Inventor 张东博曹健
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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