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A kind of preparation method of nitrided nanoporous ti-ag

A nanoporous and nitriding technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of small specific surface area of ​​alloy sheet, small pore occupied space, application and other problems, and achieve small pore size, The effect of occupying a large space and broadening the application field

Active Publication Date: 2016-08-17
TAIYUAN UNIV OF TECH
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  • Summary
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing nitrided nanoporous Ti-Ag alloy strips or alloy sheets by double-layer glow plasma nitriding and dealloying, which solves the problem that the prior art cannot effectively synthesize nitrided Ti-Ag alloys. Nanoporous Ti-Ag alloy ribbons or alloy sheets or prepared nitrided nanoporous Ti-Ag alloy ribbons or alloy sheets have small pore specific surface area and small space occupied by pores, which cannot be applied in practice.

Method used

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preparation example Construction

[0011] A method for preparing nitrided nanoporous Ti-Ag, which adopts the method of combining rapid solidification, blow casting, double-layer glow plasma nitriding and dealloying, comprising the following steps:

[0012] (1) After heating and melting pure Ti and pure Ag, they are cast into ingots;

[0013] (2) Heating the obtained alloy ingot to a molten state, using an inert gas to quickly blow out the alloy liquid, so that the molten liquid metal is rapidly solidified on a high-speed rotating copper roller, and an alloy strip is prepared, or the liquid metal is blown directly into the copper mold to obtain the alloy sheet;

[0014] (3) Double-layer glow plasma nitriding of the obtained alloy strip or alloy sheet; the double-layer glow plasma nitriding process is to put the pretreated alloy strip or alloy sheet into a plasma nitriding furnace, Introduce argon gas, under the pressure of 30-50Pa (30Pa, 35Pa, 40Pa, 45Pa, 50Pa can be selected), adjust the voltage 450-650V (450V...

Embodiment 1

[0022] (1) According to the proportion of 60% Ti and the rest of Ag, the Ti-Ag alloy is heated and melted, and then cast into an ingot; take a small fast to re-melt, and use argon to melt the molten ingot under 0.1MPa pressure. The alloy liquid is quickly blown out, so that the molten liquid metal is rapidly solidified on the high-speed rotating copper roller, and an alloy thin strip with a thickness of 20-40 μm, a width of 2-5 mm, and a length of 10-70 mm is prepared.

[0023] (2) Plasma nitriding the obtained alloy ribbon. The ion nitriding process is characterized in that argon is introduced into the ion nitriding furnace equipped with graphite electrodes, after sputtering and cleaning at a pressure of 45Pa and a voltage of 500V, nitrogen is introduced to control the volume of argon and nitrogen The ratio is 0.5, pressurized to 350Pa, the power supply voltage is adjusted to 750V, the graphite electrode voltage is adjusted to 550V, and the temperature is kept at 400°C. Ion n...

Embodiment 2

[0026] (1) According to the ratio of 50% Ti by atomic percentage and the rest of Ag, the Ti-Ag alloy is heated and melted, and then cast into an ingot; take a small fast to re-melt, and blow into the copper with argon at a pressure of 0.1MPa. In the mold, an alloy sheet with a thickness of 2 mm, a width of 5 mm, and a length of 10 mm was prepared.

[0027](2) Plasma nitriding the obtained alloy sheet. The ion nitriding process is characterized in that argon gas is introduced into the ion nitriding furnace equipped with graphite electrodes, and after sputtering and cleaning at a pressure of 35Pa and a voltage of 550V, ammonia gas is introduced to control the argon and ammonia gas. The volume ratio is 0.8, pressurized to 400Pa, the power supply voltage is adjusted to 600V, the graphite electrode voltage is adjusted to 450V, and the temperature is maintained at 350°C. Ion nitriding is carried out on the surface of the alloy sheet, and the temperature is kept for 1.5 hours to gene...

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Abstract

The invention discloses a method for preparing nitriding nano-porous Ti-Ag on a Ti-Ag noncrystal alloy belt or an alloy plate by adopting a plasma nitridation combined with constant-voltage dealloying method, and aims to provide a novel titanium nitride electrode catalyst. In an experiment, a double-layer glow plasma nitridation process is used for performin plasma nitridation on the Ti-Ag noncrystal alloy belt or the alloy plate; afterwards, a traditional electrochemical three-electrode system is adopted for applying constant voltage to the noncrystal alloy belt or the alloy plate to perform constant-voltage electrochemical corrosion by adopting a Gamry Reference 600 electrochemical workstation by taking a nitric acid solution as an electrolyte solution so as to prepare a nano-porous structure of which pores are uniformly distributed. The method disclosed by the invention is low in implementation cost, simple and convenient to operate, high in controllability, good in repeatability and low in reaction temperature, and is an efficient and economical synthetic method.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation, and in particular relates to a method for preparing nitrided nanoporous Ti-Ag by using a double-layer glow plasma nitriding and dealloying method. Background technique [0002] Nanoporous metal material is a kind of nanomaterials. As a metal material, it has the same basic properties as ordinary metal materials, such as: high electrical conductivity, high thermal conductivity, corrosion resistance and fatigue resistance, etc.; but its nanometer The size of the level makes it have special characteristics different from ordinary metal materials, such as: small relative density, large specific surface area, and the same surface effect, quantum size effect, and macroscopic quantum tunneling effect as other nanomaterials. These unique properties of nanoporous metal materials make it widely used in many fields, such as electronics, optics, magnetism, sensing, heat exchange, surface plasmon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C1/10C23C8/36
Inventor 王鹤峰李飞靳晓敏刘二强于菲菲
Owner TAIYUAN UNIV OF TECH
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