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A method for preparing pt-al high temperature protective coating on the surface of niobium alloy

A protective coating, niobium alloy technology, applied in metal material coating process, coating, solid-state diffusion coating and other directions, can solve the problems of limited application, poor oxidation resistance of niobium, etc., to achieve simple operation, improved oxidation resistance, Reduce the effect of sample damage

Inactive Publication Date: 2019-10-08
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxidation resistance of niobium is poor, and "pest" oxidation is formed at 600 °C, which greatly limits its application.

Method used

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  • A method for preparing pt-al high temperature protective coating on the surface of niobium alloy
  • A method for preparing pt-al high temperature protective coating on the surface of niobium alloy
  • A method for preparing pt-al high temperature protective coating on the surface of niobium alloy

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Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing a Pt-Al high-temperature protective coating on the surface of a niobium alloy, comprising the following steps:

[0025] 1. Select C103 niobium alloy as the substrate, and its chemical composition is shown in the table below

[0026] Element f Ti Zr W Ta Nb Content wt (%) 10.0 1.30 0.34 0.31 0.30 Bal.

[0027] Pre-treat the surface of the niobium alloy substrate, polish it with 240#, 400#, 600#, 800#, 1000# and 1500# sandpaper in sequence, clean it with acetone ultrasonically, rinse it with deionized water, and dry it for later use;

[0028] 2. Put the niobium alloy substrate processed in step 1 into the MSP-1S ion sputtering apparatus to prepare the Pt layer; the target is a Pt target with a purity of 99.9-99.999%; the target is placed on the niobium alloy substrate platform The distance is 25mm, the vacuum rate is 20I / min, the sputtering vacuum is 10Pa, the current is 47mA, the sputtering time is 2min, and a P...

Embodiment 2

[0031] 1. Select C103 niobium alloy as the substrate, and its chemical composition is shown in the table below

[0032] Element f Ti Zr W Ta Nb Content wt (%) 10.0 1.30 0.34 0.31 0.30 Bal.

[0033] Pre-treat the surface of the niobium alloy substrate, polish it with 240#, 400#, 600#, 800#, 1000# and 1500# sandpaper in sequence, clean it with acetone ultrasonically, rinse it with deionized water, and dry it for later use;

[0034] 2. Put the niobium alloy substrate processed in step 1 into the MSP-1S ion sputtering apparatus to prepare the Pt layer; the target is a Pt target with a purity of 99.9-99.999%; the target is placed on the niobium alloy substrate platform The distance is 25mm, the vacuum rate is 20I / min, the sputtering vacuum is 10Pa, the current is 47mA, the sputtering time is 2min, and a Pt layer with a thickness of 8-12nm is prepared on the surface of the niobium alloy substrate;

[0035] 3. The niobium alloy substrate containin...

Embodiment 3

[0037] 1. Select C103 niobium alloy as the substrate, and its chemical composition is shown in the table below

[0038] Element f Ti Zr W Ta Nb Content wt (%) 10.0 1.30 0.34 0.31 0.30 Bal.

[0039] Pre-treat the surface of the niobium alloy substrate, polish it with 240#, 400#, 600#, 800#, 1000# and 1500# sandpaper in sequence, clean it with acetone ultrasonically, rinse it with deionized water, and dry it for later use;

[0040]2. Put the niobium alloy substrate processed in step 1 into the MSP-1S ion sputtering apparatus to prepare the Pt layer; the target is a Pt target with a purity of 99.9-99.999%; the target is placed on the niobium alloy substrate platform The distance is 25mm, the vacuum rate is 20I / min, the sputtering vacuum is 10Pa, the current is 47mA, the sputtering time is 2min, and a Pt layer with a thickness of 8-12nm is prepared on the surface of the niobium alloy substrate;

[0041] 3. The niobium alloy substrate containing...

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Abstract

The invention discloses a method for preparing a Pt-Al high-temperature protective coating on the surface of a niobium alloy. The method comprises the following steps of (1) carrying out pretreatmenton the surface of a niobium alloy substrate, carrying out ultrasonic cleaning on the surface of the niobium alloy substrate with acetone, then washing the surface of the niobium alloy substrate with deionized water, and drying the surface of the niobium alloy substrate for later use; (2) putting the treated niobium alloy substrate in the step (1) into an ion sputtering instrument to prepare a Pt layer; and (3) carrying out embedding and aluminizing treatment on the prepared niobium alloy substrate containing the Pt layer in the step (2) so as to prepare the Pt-Al high-temperature protective coating on the surface of the niobium alloy. The Pt-Al high-temperature protective coating comprises, by weight, 60%-70% of Al element, 2%-8% of Pt element and 20%-30% of Nb element. According to the method for preparing the Pt-Al high-temperature protective coating on the surface of the niobium alloy, the prepared Pt-Al high-temperature protective coating is continuous, compact and flat and is in metallurgical bonding with the niobium alloy substrate, the bonding strength is high, the preparation technology is a vacuum ion sputtering method and is different from the traditional electroplating method, and the method has the advantages of being simple and convenient to operate and capable of saving energy consumption.

Description

technical field [0001] The invention relates to the technical field of high-temperature coating protection, in particular to a method for preparing a Pt-Al high-temperature protection coating on the surface of a niobium alloy. Background technique [0002] With the development of high thrust-to-weight ratio aero-engines, the operating environment of their turbine blades is more harsh, which puts forward higher requirements on the performance of blade materials. Niobium has a high melting point, moderate density, high specific strength at high temperature, excellent high temperature mechanical properties and processing properties, and is considered one of the important candidate materials for high temperature structural materials. However, niobium has poor oxidation resistance and forms "pest" oxidation at 600°C, which greatly limits its application. According to relevant research reports, coating a protective coating on the surface of niobium alloys can effectively improve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/16C23C14/46C23C10/48
Inventor 李伟洲董婉冰蒋智秋童庆陈泉志黄德宇谷凤媚钱堃
Owner GUANGXI UNIV