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Preparation method of titanium substrate surface high-temperature antioxidant composite coating

A high-temperature anti-oxidation and composite coating technology, which is applied in the direction of surface reaction electrolytic coating, coating, superimposed layer plating, etc., can solve the problem of limited improvement in high-temperature oxidation resistance of titanium or titanium alloys, and easy peeling off of anti-oxidation coatings , cumbersome preparation process, etc., to achieve the effect of improving high temperature oxidation resistance, no hole defects, and simple process

Active Publication Date: 2015-06-03
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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  • Preparation method of titanium substrate surface high-temperature antioxidant composite coating
  • Preparation method of titanium substrate surface high-temperature antioxidant composite coating
  • Preparation method of titanium substrate surface high-temperature antioxidant composite coating

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Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1. Carry out 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 layer on the surface. layer and an 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 for oxidizing the titanium substrate is micro-arc oxidation, The specific process of the micro-arc oxidation is as follows: using water as a solvent to prepare a silicate system electrolyte, then placing the titanium substrate to be oxidized in the silicate system electrolyte as an anode, and a stainless steel plate as a cathode, and setting Set the micro-arc oxidation pow...

Embodiment 2

[0042] This embodiment includes the following steps:

[0043] Step 1. Carry out 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 layer on the surface. layer and aluminum coating titanium substrate; the titanium substrate is TC6 titanium alloy, the thickness of the titanium dioxide ceramic layer is 3 μm, and the thickness of the aluminum coating is 20 μm; the method for oxidizing the titanium substrate is atmospheric oxidation, so The specific process parameters of the atmospheric oxidation are as follows: the oxidation temperature is 600°C, and the oxidation time is 7 hours; the method for depositing the metal aluminum is vacuum magnetron sputtering deposition, and the target material selected for the vacuum magnetron sputtering deposi...

Embodiment 3

[0047] This embodiment includes the following steps:

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

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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 in particular relates to a preparation method of 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, and 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 parts, but also have a serious impact on their performance, which has become the main factor restricting their application. [0003] In order to overcome the above problems, people usually use surface modific...

Claims

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Application Information

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Patent Type & Authority Applications(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
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