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Electrochemically assisted powder metallurgy method for preparing porous titanium or titanium alloy

A powder metallurgy and titanium alloy technology, applied in the field of preparing porous biomedical titanium or titanium alloy, can solve the problems of high production temperature, waste of raw materials, high cost, etc., and achieve the effect of improving product performance, improving sintering quality, and promoting the formation of alloys

Active Publication Date: 2018-09-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common methods for preparing titanium alloys include vacuum self-consumption smelting-forging-machining, self-propagating high-temperature synthesis, etc. These processes not only have high production temperature, long process, high cost and waste of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing porous titanium or titanium alloy by electrochemical assisted powder metallurgy, which is carried out according to the following steps:

[0045] Step 1: Powder Compression

[0046] Fully mix the titanium alloy powder and press at 5MPa to form a flake titanium alloy porous metal precursor;

[0047] Wherein, the titanium alloy powder is TiNi, and the metals contained therein and the mass percentages of each metal are: Ni is 50%, and the balance is Ti. The particle size of the titanium alloy powder is 300 mesh.

[0048] Step 2: Electrochemical Preparation

[0049]The flake titanium alloy porous metal precursor is connected to a molybdenum rod with a diameter of 0.5±0.01mm and a purity of 99.99% to make a cathode with a fine molybdenum wire, and a high-purity graphite rod with a diameter of 10±0.1mm and a diameter of 1±0.1mm with a purity of 99.99% metal molybdenum rods are connected to make an anode; 600g of analytically pure calcium chloride is d...

Embodiment 2

[0056] A method for preparing porous titanium or titanium alloy by electrochemical assisted powder metallurgy, same as embodiment 1, the difference is:

[0057] (1) In the electrolytic alloying of step 3, a voltage of 2.7V is applied between the two electrodes;

[0058] Other methods are the same.

Embodiment 3

[0060] A method for preparing porous titanium or titanium alloy by electrochemical assisted powder metallurgy, same as embodiment 1, the difference is:

[0061] (1) In the electrolytic alloying of step 3, apply 2.5V between the two electrodes;

[0062] Other methods are the same.

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Abstract

The invention discloses an electrochemically assisted powder metallurgy method for preparing porous titanium or titanium alloy, and belongs to the field of porous biomedical titanium or titanium alloy. The method comprises the steps that titanium powder or titanium alloy powder are completely mixed and pressed into a titanium or titanium alloy porous metal precursor; then a fine molybdenum wire isconnected to a molybdenum rod, thus, a cathode is prepared, and a graphite rod is connected with a molybdenum rod, so that an anode is prepared; after molten salt raw materials are heated to a melting temperature, molten salt is formed, the cathode and the anode are inserted into the molten salt, a two-electrode system is formed, constant voltage of 2.0-3.0 V is applied into the two electrodes, electrochemically assisted sintering is conducted for 10-15 h, after electrolysis is completed, the cathode is taken out, cooled, washed with deionized water, subjected to vacuum drying and polished, and the porous titanium or titanium alloy is obtained. Through the method, the operation temperature can be lowered, the product performance is improved, and the method is environmentally friendly andeasy to operate.

Description

technical field [0001] The invention relates to the field of preparing porous biomedical titanium or titanium alloy, in particular to a method for preparing porous titanium or titanium alloy by electrochemical assisted powder metallurgy. Background technique [0002] Titanium and titanium alloys have good biocompatibility and mechanical properties, and can be used in biomedical fields such as the repair and replacement of hard tissues such as bones and teeth, and cardiovascular and soft tissue repair. Titanium alloy is used as an implant to replace the original degenerated or diseased tissue structure, restore and reconstruct its form and function, thereby prolonging human life or improving the quality of life. Titanium alloys that can be applied to biomaterials require good load-bearing properties, good biocompatibility in body fluids, excellent corrosion resistance, fatigue resistance, wear resistance, and no cytotoxicity. At present, the common methods for preparing tita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F3/105C22C14/00
CPCB22F3/105B22F3/11C22C14/00
Inventor 尹华意马雪谢宏伟宋秋实宁志强
Owner NORTHEASTERN UNIV
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