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Method for improving high-temperature oxidization resistance of titanium-based alloy

Hu Jiming, +1 more
TLDR
In this paper, a method for improving the high-temperature oxidization resistance of a titanium-based alloy matrix was proposed, where surface oxide was removed, and then cleaning and drying were performed.
Abstract: 
A method for improving the high-temperature oxidization resistance of titanium-based alloy includes the following steps that firstly, surface oxide of a titanium-based alloy matrix is removed, and then cleaning and drying are performed; secondly, characteristic ions are injected into the titanium-based alloy matrix through an ion injection method, wherein the characteristic ions are one or more of Cr, Y, Nb, F and Cl ions; thirdly, anhydrous ethanol, water and precursor alkyl silicate ester are mixed in proportion, then pH of a mixed system is adjusted to be 2.0-6.0, and stirring is performed at room temperature so that a precursor solution can be obtained; fourthly, the prepared precursor solution is added in two electrode tanks, electro-deposition is performed with the titanium-based alloy where the characteristic ions are injected as a cathode and platinum sheets or graphite as counter electrodes, a work electrode is washed in water after deposition is completed and then is dried, and a micro-nano oxide coating is obtained; and fifthly, the titanium-based alloy covered with the micro-nano oxide coating is subjected to heat treatment in air, and a coating resistant to high-temperature oxidization is obtained. The technology is simple and easy to achieve, and the high-temperature oxidization resistance of the titanium-based alloy is remarkably improved.

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Method for improving antioxidant capacity of niobium alloy surface

Han Weizhong, +1 more
TL;DR: In this paper, a method for improving the antioxidant capacity of a niobium alloy surface was proposed, which comprises the following step (1a): selecting a substrate, and cleaning and drying the substrate surface; the step (2a) of injecting alloy ions into a substrate surface under vacuum conditions and preset injection temperature; and the step(3a): performing high temperature pre-oxidation treatment to the substrate surfaces obtained in the previous step, and obtaining the substrate alloy with an antioxidant protection layer.
Patent

Ceramic coating dispersed with precious metal particles, and preparation process thereof

Wu Liankui, +5 more
TL;DR: In this paper, a preparation process of a ceramic coating dispersed with precious metal particles is described, where the preparation process comprises the steps of removing surface oxide on a ti-based alloy matrix, and then cleaning and drying; mixing absolute ethyl alcohol, a saturated potassium chloride solution and a precursor silicic acid alkyl ester, stirring to obtain a precursor solution, adding a soluble precious metal compound into the precursors, stirring until completely dissolving, and obtaining an electrodeposition liquid; and using the processed Ti-based matrix as a working electrode.
Patent

Silicon-aluminium compound coating and preparation technology thereof

Wu Liankui, +5 more
TL;DR: In this article, a preparation technology of a silicon-aluminium compound coating is presented, which comprises the steps that oxides on the surface of a titanium based alloy matrix are removed, and then cleaning and drying are conducted; absolute ethyl alcohol, water and a precursor alkyl ester silicate are mixed, the pH value is adjusted by means of acid liquor, and stirring is conducted at the room temperature to obtain a precursor solution.
References
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Metal surface coating method and application thereof

Hu Jiming, +3 more
Patent

Preparation method and application of TiO2 photocatalytic coating

Hu Jiming, +2 more
TL;DR: In this article, a method for electrically depositing organic silicane gel-sol precursor solution, a composite material having high photocatalytic activity is finally prepared by steps of firstly preparing a layer of inert and porous nano SiO2 intermediate film having high binding force on a foam metal matrix and then loading an anatase type nano TiO2 coating; and the composite coating material is used for degrading organic pollutants in air or sewage by photocatalysis.