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Preparation method of MCrAlY alloy material with yttrium elements distributed uniformly

A technology of alloy material and element uniformity, applied in the field of surface engineering, can solve the problems of excessive oxide doping, Y-enriched oxide interface defects, etc.

Active Publication Date: 2021-04-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of MCrAlY alloy material with uniform distribution of yttrium element, which is used to realize the method of uniform distribution of Y in the alloy, and solves the problem of excessive doping of Y-enriched oxides in the oxide layer and Y The formation of enriched oxide interfacial defects is two important issues

Method used

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  • Preparation method of MCrAlY alloy material with yttrium elements distributed uniformly
  • Preparation method of MCrAlY alloy material with yttrium elements distributed uniformly
  • Preparation method of MCrAlY alloy material with yttrium elements distributed uniformly

Examples

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Effect test

Embodiment 1

[0032] Put a total of 100g of commercial NiCrAlY spray powder with a particle size of 46-85μm into a vacuum glove box, and put it into a 250ml ball mill jar under the protection of an argon atmosphere. The ball mill jar needs to be protected by argon gas. The composition ratio of the powder is Ni 47.5wt%; Co23wt%; Cr 17wt%; Al 12wt%; Y 0.5wt%.

[0033] Commercial MCrAlY spray powders were ball milled by a planetary ball mill. The speed of the ball mill is 400 rpm, the ball milling time is 24 hours, the ball-to-material ratio is 12:1, and the balls are high-hardness 440C stainless steel balls. And during the ball milling process, stop for 20 minutes every hour to prevent the temperature from being too high.

[0034] Spark plasma sintering was performed on the ball milled powder prepared by ball milling. Under vacuum conditions, the temperature is raised to 1050°C at a heating rate of 100°C / min, the holding time is 10 minutes under a pressure of 50MPa, and the cooling time is ...

Embodiment 2

[0038] Put a total of 200g of commercial NiCrAlY spray powder with a particle size of 46-85μm into a vacuum glove box, and put it into a 250ml ball mill jar under the protection of an argon atmosphere. The ball mill jar needs to be protected by argon. The composition ratio of the powder is Ni 47.5wt%; Co23wt%; Cr 17wt%; Al 12wt%; Y 0.5wt%.

[0039] Commercial MCrAlY spray powders were ball milled by a planetary ball mill. The rotating speed of the ball mill is 400 rpm, the ball milling time is 24 hours, and the ball-to-material ratio is 10:1. And during the ball milling process, stop for 20 minutes every hour to prevent the temperature from being too high.

[0040] Spark plasma sintering was performed on the ball milled powder prepared by ball milling. Under vacuum conditions, the temperature is raised to 1050°C at a heating rate of 100°C / min, the holding time is 10 minutes under a pressure of 50MPa, and the cooling time is 30 minutes, so that the MCrAlY alloy with uniform d...

Embodiment 3

[0044] 46-85 μm commercial NiCrAlY spraying powder (the composition ratio of powder is Ni 47.5wt%; Co23wt%; Cr 17wt%; Al 12wt%; Y 0.5wt%) a total of 200g is put into a stainless steel vacuum ball mill tank, and then Add high-hardness 440C stainless steel balls at a ratio of 5:1, and add stearic acid seat ball milling media with a ratio of 0.05wt.%. Move the filled ball mill tank into a vacuum glove box, and use high-purity argon gas to repeatedly wash gas three times. After the gas washing is completed, seal the ball mill tank inside the glove box, and then remove it from the glove box. The sealed ball mill jar was fixed on a planetary ball mill for ball milling; the rotating speed of the ball mill was 300 rpm, and the ball milling time was 96 hours. And stop for 20 minutes every hour during the ball milling process to prevent the temperature from being too high;

[0045] Sieve the ball-milled NiCoCrAlY powder to a particle size range of 45-75μm, put the sieved powder into a ...

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Abstract

The invention relates to a preparation method of an MCrAlY alloy material with yttrium elements distributed uniformly. Ball milling is carried out on commercial MCrAlY spraying powder, and then spark plasma sintering is carried out, and thus the MCrAlY alloy material with yttrium elements distributed uniformly is prepared. The yttrium elements are uniformly distributed in an alloy matrix in the form of Ni-Y nano precipitates and Y2O3 nano particles, and the alloy has extremely low oxidation rate and excellent oxidation layer anti-stripping capability. Compared with the prior art, the method has the advantages that the method is simple and easy to implement, and the homogenization degree of the yttrium elements is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and relates to a MCrAlY alloy material with uniform distribution of yttrium element and a preparation method thereof. Background technique [0002] Thermal barrier coating MCrAlY (M=Ni, Co or Ni+Co) is a coating material widely used in heat-resistant components such as aero-engines and gas turbine blades to improve the high-temperature oxidation resistance and thermal corrosion resistance of components. , thus effectively prolonging the service life of heat-resistant components. [0003] Among them, proper doping of the active element yttrium plays a vital role in improving the oxidation performance of MCrAlY: it can combine with S in the superalloy matrix or in the bonding layer, prevent S from segregating to the interface between the oxide layer and the bonding layer, and inhibit the oxidation of the interface. The degradation of bonding performance; and can quickly diffuse to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04B22F9/04B22F3/105
Inventor 张晗陆杰李玲刘轩溱赵晓峰郭芳威范晓慧
Owner SHANGHAI JIAO TONG UNIV
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