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Surface anti-oxidation coating, preparation method thereof and surface modified titanium alloy

An anti-oxidation coating, titanium alloy technology, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problems of inability to inhibit oxygen diffusion and decline in oxidation resistance of titanium alloys, and achieve excellent oxidation resistance properties, improve antioxidant properties, promote synergistic effects

Active Publication Date: 2021-09-24
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the temperature continues to rise, the oxide film gradually becomes loose and porous, which cannot inhibit the diffusion of oxygen into the interior of the titanium alloy, resulting in a decrease in the oxidation resistance of the titanium alloy.

Method used

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  • Surface anti-oxidation coating, preparation method thereof and surface modified titanium alloy
  • Surface anti-oxidation coating, preparation method thereof and surface modified titanium alloy
  • Surface anti-oxidation coating, preparation method thereof and surface modified titanium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Using TC4 titanium alloy, cut it into a substrate of Φ30mm×10mm, and use 80 mesh, 120 mesh, 240 mesh, 400 mesh, 600 mesh, 800 mesh, 1000 mesh, 2000 mesh, 3000 mesh and 5000 mesh SiC gold in sequence Sand the substrate sequentially with sandpaper until there are no visible scratches on its surface, then wash it with acetone and dry it for later use.

[0052] The above substrate was placed in a magnetron sputtering system for coating. The target material used in magnetron sputtering is MoSi 2 Compound target and Si target. MoSi 2 The purity of compound target is 99.95wt.%, the purity of Si target is 99.95wt.%, MoSi 2 Both the compound target and the Si target have a diameter of 101 mm and a thickness of 5 mm.

[0053] The background vacuum of the magnetron sputtering chamber is 5.0×10 -6 Torr. Before coating, in order to eliminate residual pollutants and native oxide layer on the surface of the substrate, it is necessary to perform bias cleaning on the substrate. T...

Embodiment 2

[0056] The difference from Embodiment 1 is that in the magnetron sputtering, the DC sputtering power of the Si target is 100W. Prepared Si / MoSi 2 The thickness of the composite coating is 1.49 μm.

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Abstract

The invention relates to the technical field of material surface modification, and particularly discloses a surface anti-oxidation coating, a preparation method thereof and a surface modified titanium alloy. The surface anti-oxidation coating is a Si / MoSi2 composite coating, wherein a phase structure of MoSi2 is C11b type MoSi2, and the surface anti-oxidation coating has excellent high-temperature stability; the element Si exists in the form of a simple substance, so that the defect that the diffusion speed of the element Si in MoSi2 is relatively low can be overcome, and a SiO2 protective layer can be quickly formed on the surface of the coating; and meanwhile, the molar ratio of Si to MoSi2 is controlled to be (1-1.5): 1, it can be guaranteed that enough element Si reacts with O2, formation of a continuous and compact SiO2 protection layer is promoted, O2 is prevented from diffusing inwards, and generation of an MOO3 oxidation phase is avoided, so that the PESTING pulverization phenomenon caused by oxidation of the MoSi2 coating at the temperature of 500-800 DEG C is effectively inhibited.

Description

technical field [0001] The invention relates to the technical field of surface modification, more specifically, it relates to a surface anti-oxidation coating, a preparation method thereof and a surface modified titanium alloy. Background technique [0002] Due to its high specific strength, low density, and high heat resistance, titanium alloys have good application prospects in high-temperature components such as aerospace engine components and ship internal combustion engine components. Below 500°C, in the presence of oxygen, titanium will undergo an oxidation reaction, forming a well-bonded and dense oxide film on the surface of the titanium alloy, thereby preventing the titanium alloy from being further oxidized. However, when the temperature continues to rise, the oxide film gradually becomes loose and porous, which cannot inhibit the diffusion of oxygen into the interior of the titanium alloy, resulting in a decrease in the oxidation resistance of the titanium alloy. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/06C23C14/58
CPCC23C14/352C23C14/06C23C14/5806
Inventor 李凤吉余修晗张善勇王锦标
Owner SOUTHWEST UNIV