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Preparation process of porous tantalum sheet

A preparation process, porous tantalum technology, applied in the field of preparation of porous tantalum sheets, can solve the problems of narrow processing efficiency, high surface friction coefficient, high volume porosity, etc. in the processing heat-affected zone, so as to promote the electrolytic corrosion process, promote replenishment, The effect of high purity

Inactive Publication Date: 2018-09-28
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the porous tantalum sheet prepared by vapor deposition has the characteristics of high volume porosity, low elastic modulus and high surface friction coefficient, but the process requires strict operating conditions, slow deposition speed, high production cost, and because tantalum is insoluble Metals, whose vaporization is very difficult
In addition, the manufacturing method of laser cladding of porous tantalum sheet workpieces has the advantages of high energy controllability, narrow processing heat-affected zone, and high processing efficiency, which can better adapt to the flexible manufacturing environment, but it requires additional laser cladding cutting, resulting in The cost is greatly increased, which limits its wide application

Method used

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  • Preparation process of porous tantalum sheet
  • Preparation process of porous tantalum sheet
  • Preparation process of porous tantalum sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 500ml of electrolyte solution was prepared by using LiCl with a concentration of 0.1mol / L and ethanol with a purity of 95%, and prepared as figure 1 The device for preparing porous tantalum sheets includes an adjustable DC power supply and an electrolytic cell for holding an electrolytic solution. The tantalum sheet is used as an anode electrode and platinum is used as a cathode electrode to be fixed in the electrolytic cell containing the electrolytic solution. The electrode and the cathode electrode are fixed to the electrolytic cell through metal clips, one end of the anode electrode and the cathode electrode is immersed in the electrolyte solution, and the other end is exposed to the liquid surface of the electrolyte solution for connecting with the positive and negative electrodes of the adjustable DC power supply. The liquid level of the electrolyte solution is kept at 2 / 3 of the height of the electrolytic cell (this is convenient to ensure that the amount of the e...

Embodiment 2

[0044] In the preparation process of this embodiment, an ultrasonic vibrator is introduced, and the ultrasonic vibrator is used to contain the electrolytic cell, so that the electrolytic corrosion process of the tantalum sheet is carried out under the action of ultrasonic strengthening.

[0045] The ultrasonic strengthening effect of the ultrasonic vibrator can discharge the electrolytic corrosion products on the tantalum sheet and replenish fresh electrolyte solution in time, so as to ensure the uniformity of the final porous tantalum sheet.

[0046] Specifically, in this embodiment, the electrolyte solution is prepared by using LiCl with a concentration of 0.4 mol / L and ethanol with a purity of 99.7%. The voltage of the DC power supply was set to 30V (the current was 3A), and electrolytic corrosion was started to prepare porous tantalum sheets. The electrolytic etching process lasted for 2 minutes, and porous tantalum sheets with relatively uniform distribution of pores were ...

Embodiment 3

[0049] The difference between this embodiment and embodiment 1 is that the conductive agent uses TaCl 5 , Figure 5 The surface morphology of the porous tantalum sheet prepared in this example under the condition of 500 times is shown.

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Abstract

The invention belongs to the technical field of tantalum sheet preparation and discloses a preparation process of a porous tantalum sheet. An electrolytic corrosion mode is adopted for preparation. The preparation process comprises the steps of preparing a tantalum sheet as an anode electrode and platinum as a cathode electrode, and putting the anode electrode and the cathode electrode into an electrolytic cell; preparing an electrolyte solution with ethyl alcohol and a conductive agent, and putting the prepared electrolyte solution into the electrolytic cell, wherein the conductive agent is chloride which can be dissolved into the ethyl alcohol; after the distance between the anode electrode and the cathode electrode, fixing the anode electrode and the cathode electrode to the electrolytic cell; and connecting the anode electrode and the cathode electrode to a positive pole and a negative pole of a direct-current power source correspondingly, and starting electrolytic corrosion to prepare the porous tantalum sheet. The obtained porous tantalum sheet is large in number of holes; the holes are distributed relatively uniformly; the diameters of the holes are each at the micron level;and the tantalum sheet can be used as an excellent raw material in all relevant fields.

Description

technical field [0001] The invention relates to the technical field of preparation of tantalum sheets, in particular to a preparation process of porous tantalum sheets. Background technique [0002] Metal tantalum has a series of excellent properties such as high melting point, good cold working performance, high chemical stability, strong resistance to liquid metal corrosion, and large dielectric constant of the surface oxide film. It is widely used in electronics, metallurgy, steel, chemical industry, hard alloy, atomic energy, It has important applications in high-tech fields such as superconducting technology, automotive electronics, aerospace, medical and health care, and scientific research. However, due to the high melting point of tantalum, the prepared material has low porosity, uneven pore size and high closed porosity, and the produced tantalum sheet has low porosity, uneven pore size, and small specific surface area, which affects normal use. . [0003] At pres...

Claims

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Application Information

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IPC IPC(8): C25F3/08
CPCC25F3/08
Inventor 银锐明阳建君
Owner HUNAN UNIV OF TECH
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