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One-step method for preparing black titanium oxide/alumina composite ceramic coating

A technology of composite ceramics and titanium oxide, applied in coating, anodizing, surface reaction electrolytic coating, etc., to achieve the effects of low cost, simple process and convenient operation

Active Publication Date: 2018-10-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that it is difficult to prepare a black titanium oxide / alumina composite ceramic coating with high hardness and high wear resistance in one step in the prior art. A layer of black titanium oxide / alumina composite ceramic coating with high hardness and wear resistance, and the preparation method has the advantages of simple process, low cost, large-area preparation and no special shape constraints on the workpiece itself

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  • One-step method for preparing black titanium oxide/alumina composite ceramic coating
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  • One-step method for preparing black titanium oxide/alumina composite ceramic coating

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Embodiment 1

[0027] The preparation method of black titanium oxide / alumina composite ceramic coating of the present invention is as follows:

[0028] The first step is to use Ti6Al4V titanium alloy as the base material and process it into a round bar-shaped part by machining means, then ultrasonically clean it with acetone, absolute ethanol and distilled water for 10 minutes, and dry it for later use;

[0029] The second step is to configure the electrolyte for micro-arc oxidation treatment, using 6g / L Na 2 SiO 3 , 5g / L (NaPO 3 ) 6 , 3g / L NaAlO 2 and 3g / L NH 4 VO 3 , and use NaOH to adjust the pH value of the electrolyte to 8-11, form the electrolyte for micro-arc oxidation and pour it into the micro-arc oxidation electrolytic cell;

[0030] The third step is to hang the cleaned titanium alloy rod-shaped parts in the micro-arc oxidation electrolytic cell, connect the workpiece to the anode of the micro-arc oxidation power supply, connect the stainless steel electrolytic cell to the c...

Embodiment 2

[0033] The preparation method of black titanium oxide / alumina composite ceramic coating of the present invention is as follows:

[0034]The first step is to use Ti6Al4V titanium alloy as the base material and process it into a round bar-shaped part by machining means, then ultrasonically clean it with acetone, absolute ethanol and distilled water for 10 minutes, and dry it for later use;

[0035] The second step is to configure the electrolyte for micro-arc oxidation treatment, using 8g / L Na 2 SiO 3 , 10g / L (NaPO 3 ) 6 , 5g / L NaAlO 2 and 6g / L NH 4 VO 3 , and use NaOH to adjust the pH value of the electrolyte to 8-11, form the electrolyte for micro-arc oxidation and pour it into the micro-arc oxidation electrolytic cell;

[0036] The third step is to hang the cleaned titanium alloy rod-shaped parts in the micro-arc oxidation electrolytic cell, connect the workpiece to the anode of the micro-arc oxidation power supply, connect the stainless steel electrolytic cell to the c...

Embodiment 3

[0038] The preparation method of black titanium oxide / alumina composite ceramic coating of the present invention is as follows:

[0039] The first step is to use Ti6Al4V titanium alloy as the base material and process it into a round bar-shaped part by machining means, then ultrasonically clean it with acetone, absolute ethanol and distilled water for 10 minutes, and dry it for later use;

[0040] The second step is to configure the electrolyte for micro-arc oxidation treatment, using 5g / L Na 2 SiO 3 , 3g / L (NaPO 3 ) 6 , 8g / L NaAlO 2 and 8g / L NH 4 VO 3 , and use NaOH to adjust the pH value of the electrolyte to 8-11, form the electrolyte for micro-arc oxidation and pour it into the micro-arc oxidation electrolytic cell;

[0041] The third step is to hang the cleaned titanium alloy rod-shaped parts in the micro-arc oxidation electrolytic cell, connect the workpiece to the anode of the micro-arc oxidation power supply, connect the stainless steel electrolytic cell to the c...

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Abstract

The invention discloses a method for preparing a black titanium oxide / aluminum oxide composite ceramic coating. The method comprises the following steps that (1) oil removal and cleaning treatment are carried out with titanium alloy or aluminum alloy as a base material; (2) electrolyte for micro-arc oxidation processing is prepared; and (3) a high-voltage and high-frequency bipolar pulse micro-arc oxidation power supply is adopted, the electrolyte mentioned in the step (2) is added to a micro-arc oxidation electrolytic bath with the base material in the step (1) as an anode and stainless steel as a cathode, technical parameters of the micro-arc oxidation power supply are adjusted correspondingly, the temperature of the electrolyte is controlled, and the black titanium oxide / aluminum oxide composite ceramic coating can be obtained on the surface of the base material after the reaction is carried out for a certain period. The method is simple in process, low in cost, capable of achieving large-area preparation, free of special shape restraint of workpieces, and suitable for industrial batch production, and the prepared black titanium oxide / aluminum oxide composite ceramic coating has high microhardness and abrasion resistance and can be applied to the fields of aerospace, petroleum chemical pipes, national defense equipment and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional coatings on the surface of metal substrates, in particular to a micro-arc oxidation preparation method of black titanium oxide / alumina composite ceramic coatings on the surface of titanium alloys or aluminum alloys. The prepared black titanium oxide / alumina composite ceramic coating has broad application prospects in the fields of medical equipment, aerospace and national defense weapons and equipment. Background technique [0002] Titanium and its alloys have high specific strength, corrosion resistance, high temperature resistance and oxidation resistance, aluminum and its alloys also have high specific strength, light weight and easy processing, so both are medical Key supporting materials in industrial fields such as equipment, aerospace, and national defense weapons and equipment. However, titanium alloys or aluminum alloys have low hardness and poor wear resistance, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26C25D11/06
CPCC25D11/026C25D11/06C25D11/26
Inventor 沈一洲陶杰刘森云朱春玲
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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