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Porous tantalum-niobium alloy and preparation method thereof

A niobium alloy and porous tantalum technology, applied in medical science, prosthesis, etc., can solve the problems of large elastic modulus, stress shielding, high density, etc., and achieve the effect of easy porosity, lower raw material cost, and simple equipment

Inactive Publication Date: 2014-05-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a porous tantalum-niobium alloy to solve the problems of traditional tantalum stent materials with high density and high elastic modulus, which are easy to cause stress shielding.

Method used

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  • Porous tantalum-niobium alloy and preparation method thereof
  • Porous tantalum-niobium alloy and preparation method thereof
  • Porous tantalum-niobium alloy and preparation method thereof

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preparation example Construction

[0034] see figure 1 , the preparation method of the porous tantalum-niobium alloy of an embodiment, comprises the following steps:

[0035] Step S101: After mixing the tantalum powder and the niobium powder, adding a dispersant solution and mixing to obtain a tantalum-niobium mixed powder slurry, filling the tantalum-niobium mixed powder slurry into a porous template to obtain a tantalum-niobium mixed powder slurry porous template.

[0036] After mixing the tantalum powder and niobium powder, add the dispersant solution and mix evenly to keep the tantalum powder and niobium powder mixed evenly, which will help the subsequently formed tantalum-niobium mixed powder slurry to be smoothly filled into the porous template. Using water as a solvent to prepare the dispersant into a dispersant solution, adding the cooled dispersant solution into the tantalum-niobium alloy powder and stirring evenly to form a stable suspension to obtain a tantalum-niobium mixed powder slurry. Put the ...

Embodiment 1

[0059] 1. Weigh 6g of polyvinyl alcohol, put it into a beaker with 100ml of deionized water, add an appropriate amount of distilled water to the mark, put the beaker into a water bath, heat it in a water bath and stir evenly to make it an aqueous solution of polyvinyl alcohol. According to the weight ratio of tantalum powder and niobium powder of 9:1, use a balance to weigh 45g of tantalum powder and 5g of niobium powder respectively. The particle size of tantalum powder and niobium powder is 10μm, the oxygen content is less than 0.1%, and the carbon content is less than 0.02%. . Add the uniformly mixed tantalum powder and niobium powder into an aqueous solution of 7 g of polyvinyl alcohol, stir and mix uniformly to obtain a tantalum-niobium mixed powder slurry. select A 10×25mm porous polyurethane foam is put into it for dipping until the pores of the polyurethane foam are filled with the tantalum-niobium mixed powder slurry, and the polyurethane foam filled with the tantal...

Embodiment 2

[0066] 1. Weigh 5g of polyvinyl alcohol, put it into a beaker with 100ml of deionized water, add an appropriate amount of distilled water to the mark, put the beaker into a water bath, heat it in a water bath and stir evenly to make it an aqueous solution of polyvinyl alcohol. According to the weight ratio of tantalum powder and niobium powder of 3:1, weigh 60g of tantalum powder and 20g of niobium powder respectively with a balance. The particle size of tantalum powder and niobium powder is 30μm, the oxygen content is less than 0.1%, and the carbon content is less than 0.02%. Add the uniformly mixed tantalum powder and niobium powder into an aqueous solution of 10 g of polyvinyl alcohol, stir and mix uniformly to obtain a tantalum-niobium mixed powder slurry. Select a porous polyurethane foam of 10×10×30mm and put it into it for dipping until the pores of the polyurethane foam are filled with the tantalum-niobium mixed powder slurry, and put the polyurethane foam filled with t...

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Abstract

The invention provides a porous tantalum-niobium alloy. The porous tantalum-niobium alloy has a pore structure with interconnected through holes. The porosity of the porous tantalum-niobium alloy is 50%-70%. A preparation method of the porous tantalum-niobium alloy comprises the following steps: uniformly mixing tantalum powder and niobium powder, then adding a dispersing agent solution, uniformly mixing so as to obtain tantalum-niobium mixed powder slurry, and filling the tantalum-niobium mixed powder slurry into a porous template, thus obtaining the porous template containing the tantalum-niobium mixed powder slurry; drying the porous template containing the tantalum-niobium mixed powder slurry in vacuum so as to obtain a biscuit; heating the biscuit to 400 DEG C-600 DEG C in a protective gas atmosphere, and carrying out degreasing treatment, thus obtaining the degreased biscuit; and sintering the degreased biscuit in vacuum so as to obtain the porous tantalum-niobium alloy. The porous tantalum-niobium alloy has a three-dimensional connected structure and appropriate porosity, and the elasticity modulus of the material is reduced while the proper strength and porosity are ensured, so that the elasticity modulus is appropriate to that of human bones. The preparation method of the porous tantalum-niobium alloy is simple in process and equipment and low in cost; the porosity of the porous tantalum-niobium alloy is easy to adjust.

Description

technical field [0001] The invention relates to biomedical materials, in particular to a porous tantalum-niobium alloy and a preparation method thereof. Background technique [0002] Porous medical hard tissue implant materials have important and special uses in the treatment of bone tissue trauma and bone tissue necrosis. Common materials include porous metal stainless steel and porous metal titanium. As a hard tissue implant material, in addition to good biocompatibility and mechanical properties, it must also have good biomechanical compatibility. [0003] Metal tantalum has good wear resistance and corrosion resistance, has no reaction with human body fluids, and has no stimulation to body tissues. It is an ideal human tissue substitute material. Metal tantalum has been used clinically for decades, and products made from it include cardiac pacemakers, vascular clips, femoral stem prostheses, metal wires, metal sheets, and metal meshes implanted in the body. Pure tantal...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C27/02C22C30/00A61L27/04A61L27/56
Inventor 王汇丰阮建明李婧刘超
Owner CENT SOUTH UNIV
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