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A kind of preparation method of high-temperature anti-oxidation composite coating on the surface of titanium substrate

A high-temperature anti-oxidation and composite coating technology, applied in the direction of coating, superimposed layer plating, metal material coating process, etc., can solve the problem of limited improvement of high-temperature anti-oxidation performance of titanium or titanium alloys, and easy shedding of anti-oxidation coatings , the preparation process is cumbersome and other problems, to achieve the effect of improving high temperature antioxidant capacity, no hole defects, and simple process

Active Publication Date: 2017-05-31
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the methods of the prior art, although an anti-oxidation coating containing aluminum is formed on the surface of titanium or titanium alloys to improve the high-temperature oxidation resistance of titanium or titanium alloys, the preparation process is generally cumbersome, the preparation cycle is long, and the anti-oxidation The coating is easy to fall off and the improvement of the high temperature oxidation resistance of titanium or titanium alloy is limited, etc.

Method used

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  • A kind of preparation method of high-temperature anti-oxidation composite coating on the surface of titanium substrate
  • A kind of preparation method of high-temperature anti-oxidation composite coating on the surface of titanium substrate
  • A kind of preparation method of high-temperature anti-oxidation composite coating on the surface of titanium substrate

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Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1. Perform surface polishing treatment on the titanium substrate, and then oxidize the polished titanium substrate to obtain a titanium substrate with a titanium dioxide ceramic layer on the surface, and then deposit metal aluminum on the titanium dioxide ceramic layer to obtain a titanium dioxide ceramic on the surface Layer and aluminum-coated titanium substrate; the titanium substrate is pure titanium TA2, the thickness of the titanium dioxide ceramic layer is 5 μm, and the thickness of the aluminum coating is 30 μm; the method of oxidizing the titanium substrate is micro-arc oxidation, The specific process of the micro-arc oxidation is: preparing a silicate system electrolyte with water as a solvent, then placing the titanium matrix to be oxidized in the silicate system electrolyte as an anode, and a stainless steel plate as a cathode. The fixed micro-arc oxidation power supply is a constant voltage working mo...

Embodiment 2

[0042] This embodiment includes the following steps:

[0043] Step 1. Perform surface polishing treatment on the titanium substrate, and then oxidize the polished titanium substrate to obtain a titanium substrate with a titanium dioxide ceramic layer on the surface, and then deposit metal aluminum on the titanium dioxide ceramic layer to obtain a titanium dioxide ceramic on the surface Layer and aluminum-coated titanium substrate; the titanium substrate is TC6 titanium alloy, the thickness of the titanium dioxide ceramic layer is 3 μm, the thickness of the aluminum coating is 20 μm; the method of oxidizing the titanium substrate is atmospheric oxidation, so The specific process parameters of the atmospheric oxidation are: the oxidation temperature is 600°C, the oxidation time is 7 hours; the method of depositing the metal aluminum is vacuum magnetron sputtering deposition, and the target material selected for the vacuum magnetron sputtering deposition is quality purity The select...

Embodiment 3

[0047] This embodiment includes the following steps:

[0048] Step 1. Perform surface polishing treatment on the titanium substrate, and then oxidize the polished titanium substrate to obtain a titanium substrate with a titanium dioxide ceramic layer on the surface, and then deposit metal aluminum on the titanium dioxide ceramic layer to obtain a titanium dioxide ceramic on the surface Layer and aluminum coating titanium substrate; the titanium substrate is pure titanium TA1, the thickness of the titanium dioxide ceramic layer is 7 μm, the thickness of the aluminum coating is 40 μm; the oxidation is micro-arc oxidation, the micro-arc The specific process of oxidation is as follows: prepare a silicate system electrolyte with water as a solvent, then place the titanium matrix to be oxidized in the silicate system electrolyte as an anode, a stainless steel plate as a cathode, and set micro-arc oxidation The power supply is a constant voltage working mode, the pulse frequency is adju...

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Abstract

The invention discloses a preparation method of a titanium substrate surface high-temperature antioxidant composite coating. The preparation method comprises the following steps: I, carrying out the surface polishing treatment for a titanium substrate, oxidizing the titanium substrate subjected to the surface polishing treatment to obtain a titanium substrate with a titanium dioxide ceramic layer on the surface, and depositing metal aluminum on the titanium dioxide ceramic layer to obtain the titanium substrate with a titanium dioxide ceramic layer and an aluminum coating on the surface; and II, carrying out the vacuum heat treatment for the titanium substrate with the titanium dioxide ceramic layer and the aluminum coating on the surface, and obtaining a high-temperature antioxidant composite coating on the surface of the titanium substrate. The high-temperature antioxidant composite coating consisting of Ti and Al intermetallic compounds and oxide ceramics can be prepared on the surface of the titanium substrate, and the high-temperature antioxidant composite coating structure is continuous and compact and has no hole defect; moreover, the surface of the high temperature antioxidant composite coating is provided with an Al2O3 membrane, the Al2O3 membrane can prevent an oxygen element from diffusing into the titanium substrate, and the high temperature antioxidant capability of the titanium substrate can be improved.

Description

Technical field [0001] The invention belongs to the technical field of material surface treatment, and specifically relates to a method for preparing a high-temperature oxidation-resistant composite coating on the surface of a titanium substrate. Background technique [0002] Titanium and titanium alloys have high specific strength, good corrosion resistance, heat resistance, low-temperature mechanical properties and non-magnetic properties. They have been widely used in aerospace, ships, chemicals, automobiles, biomedicine, daily necessities and other fields. . However, titanium and titanium alloys have poor high-temperature oxidation resistance, and are prone to oxidation and oxygen embrittlement under high-temperature conditions, which not only damage the surface of the part, but also have a serious impact on its performance, which has become the main factor restricting its application. [0003] To overcome the above problems, people usually use surface modification technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/00C23C14/58C23C14/18
CPCC22F1/183C23C14/14C23C14/5806C25D11/26
Inventor 李争显刘林涛华云峰李宏战王彦峰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH