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Two-step preparation method for Zr, Ti, Al multivariate modified silicide seepage layer

A silicide, step-by-step technology, applied in the field of multi-component modified silicide infiltration layer, to achieve excellent high temperature oxidation resistance, easy infiltration layer optimization, and convenient operation.

Active Publication Date: 2019-04-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the technology of preparing Zr, Ti, Al multi-modified silicide infiltrated layer on the surface of Nb-based super high temperature alloy by composite technology has not been reported.

Method used

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  • Two-step preparation method for Zr, Ti, Al multivariate modified silicide seepage layer
  • Two-step preparation method for Zr, Ti, Al multivariate modified silicide seepage layer
  • Two-step preparation method for Zr, Ti, Al multivariate modified silicide seepage layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Prepare the target material: melt the alloy ingot with the nominal composition of 70Ti-10Al-15Nb-5Zr (at.%) in a water-cooled copper crucible high-frequency induction melting furnace, and then cut the alloy ingot into Φ60mm by wire EDM ×3mm disc, and use 240~2000#SiC sandpaper to polish the surface of the target until smooth, ultrasonically clean it in absolute ethanol, and then dry it with cold air for later use; ×7mm×7mm Nb-based ultra-high temperature alloy block sample, the surface is polished to 1000# with water sandpaper, ultrasonically cleaned in anhydrous ethanol, and then dried with cold air for later use; Take Si powder (10wt.%), Y 2 o 3 powder (3wt.%), NaF powder (5wt.%) and Al 2 o 3 powder (82wt.% as a filler); (4) ball milling agent: the ball mill tank containing the agent and balls is installed in a ball mill for ball milling, the ball mill speed is 400r / min, and the ball milling time is 4h; (5) magnetic Controlled sputtering alloy film: place the ...

Embodiment 2

[0043] (1) Prepare the target material: melt an alloy ingot with a nominal composition of 25Ti-8Al-57Nb-10Zr (at.%) in a water-cooled copper crucible high-frequency induction melting furnace, and then cut the alloy ingot into Φ60mm by wire EDM ×3mm disc, and use 240~2000#SiC sandpaper to polish the surface of the target until smooth, ultrasonically clean it in absolute ethanol, and then dry it with cold air for later use; ×7mm×7mm Nb-based ultra-high temperature alloy block sample, the surface is polished to 1000# with water sandpaper, ultrasonically cleaned in anhydrous ethanol, and then dried with cold air for later use; Take Si powder (12wt.%), Y 2 o 3 powder (5wt.%), NaF powder (5wt.%) and Al 2 o 3 powder (78wt.% as a filler); (4) ball milling agent: install the ball mill tank with the agent and balls in the ball mill for ball milling, the speed of the ball mill is 400r / min, and the milling time is 4h; (5) Magnetron sputtering alloy film: place the cleaned substrate al...

Embodiment 3

[0046] (1) Prepare the target material: melt an alloy ingot with a nominal composition of 25Ti-5Al-69Nb-1Zr (at.%) in a water-cooled copper crucible high-frequency induction melting furnace, and then cut the alloy ingot into Φ60mm by wire electric discharge cutting ×3mm disc, and use 240~2000#SiC sandpaper to polish the surface of the target until smooth, ultrasonically clean it in absolute ethanol, and then dry it with cold air for later use; ×7mm×7mm Nb-based ultra-high temperature alloy block sample, the surface is polished to 1000# with water sandpaper, ultrasonically cleaned in anhydrous ethanol, and then dried with cold air for later use; Take Si powder (10wt.%), Y 2 o 3 powder (2wt.%), NaF powder (5wt.%) and Al 2 o 3 powder (87wt.% as filler); (4) ball milling agent: the ball mill tank containing the agent and balls is installed in the ball mill for ball milling, the ball mill speed is 400r / min, and the ball milling time is 4h; (5) magnetic Controlled sputtering all...

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Abstract

The invention relates to a two-step preparation method for a Zr, Ti, Al multivariate modified silicide seepage layer. Firstly, the type and content of the modified element are optimized through the component control of an alloy target; and secondly, by controlling the deposition thickness and diffusion seepage process parameters of magnetron sputtering Ti-Al-Nb-Zr alloy film, and the multivariatemodified silicide seepage layer with controllable content of Zr, Ti, Al modified elements, controllable alloy film thickness, controllable coating thickness and dense microstructure is prepared on thesurface of Nb-base ultra-high-temperature alloy. The two-step preparation method has the advantages that the process is simple, the operation is convenient, the cost is low, the seepage layer optimization is conveniently achieved, and the two-step preparation method is suitable for application and popularization.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy thermal protection, and relates to a method for preparing a Zr, Ti and Al multi-component modified silicide infiltration layer on the surface of an Nb-based super high-temperature alloy by using a two-step method. Background technique [0002] Because of its high melting point, moderate density, and excellent high-temperature performance, Nb-based superalloys are considered to be one of the most important new high-temperature structural materials for aerospace applications. However, the poor high-temperature oxidation resistance of this alloy limits its practical use. Although the addition of alloying elements can effectively improve the high-temperature oxidation resistance, it is still not enough to meet the actual needs. Therefore, it is very necessary to prepare protective coatings on the surface of Nb-based superalloys. [0003] The silicide coating has high melting point, low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C10/44C23C28/00
CPCC23C10/44C23C14/165C23C14/35C23C28/321C23C28/322C23C28/34
Inventor 郭喜平何佳华乔彦强
Owner NORTHWESTERN POLYTECHNICAL UNIV
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