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Preparation method of pore-controllable porous nickel-titanium shape memory alloy

A memory alloy, nickel-titanium alloy technology, applied in medical science, prosthesis, etc., can solve the problems of uneven pore distribution, low porosity, and difficult to control the shape

Inactive Publication Date: 2014-05-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to solve the problems of low porosity, uneven pore distribution and difficult to control the shape of the traditional preparation method of porous nickel-titanium shape memory alloy with controllable pores, and to provide a high-porosity and uniform pore with three-dimensional connectivity. Preparation method of porous nickel-titanium shape memory alloy with controllable porosity of structure

Method used

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  • Preparation method of pore-controllable porous nickel-titanium shape memory alloy
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  • Preparation method of pore-controllable porous nickel-titanium shape memory alloy

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preparation example Construction

[0030] see figure 1 A method for preparing a porous nickel-titanium shape memory alloy with controllable pores in one embodiment, comprising the following steps:

[0031] Step S101: mixing the additive solution and the nickel-titanium alloy powder to obtain a nickel-titanium alloy slurry, filling the nickel-titanium alloy slurry into a porous template to obtain a porous template containing the nickel-titanium alloy slurry.

[0032] The additive is configured into an additive solution with water or ethanol as a solvent, and the cooled additive solution is added into the nickel-titanium alloy powder and stirred evenly to form a stable suspension to obtain a nickel-titanium alloy slurry. The porous template is immersed in the nickel-titanium alloy slurry until the pores of the porous template are completely filled, and any inclusions are avoided during dipping.

[0033] The porous template is used as a carrier to make the pores of the nickel-titanium alloy uniformly distributed,...

Embodiment 1

[0051] 1. Weigh 3g of methylcellulose, put it into a glass, add enough distilled water, heat it on an electric stove and stir evenly to prepare 100mL of methylcellulose aqueous solution. Weigh 40g of nickel-titanium alloy powder, the atomic ratio of Ni atoms to Ti atoms in the nickel-titanium alloy powder is 1:1, and the particle size is 15 μm. Add the nickel-titanium alloy powder to 10 g of methyl cellulose aqueous solution, and mix evenly by hand. To make it into a nickel-titanium alloy slurry, select a polymer bracket with a pore size of 0.8mm and a size of φ12×25mm and dip it in it until the polyurethane foam no longer absorbs the nickel-titanium alloy slurry, scrape off the excess nickel-titanium alloy material on the surface slurry to obtain polyurethane foam containing the nickel-titanium alloy slurry, and clamp the polyurethane foam containing the nickel-titanium alloy slurry into a porcelain plate.

[0052] 2. Place the porcelain plate containing the polyurethane foam...

Embodiment 2

[0061] 1. Weigh 5g of methyl cellulose, put it into a glass, add enough distilled water, heat it on an electric stove and stir evenly to prepare 100mL of methyl cellulose aqueous solution. Weigh 30g of nickel-titanium alloy powder, the atomic ratio of Ni atoms to Ti atoms in the nickel-titanium alloy powder is 1:1, and the particle size is 25μm, add 10g of methyl cellulose aqueous solution, stir and mix evenly by hand to make it into nickel For the titanium alloy slurry, polyurethane foam with a pore size of 1.0mm and a size of 15×15×35mm was used to impregnate it until the polyurethane foam no longer absorbed the nickel-titanium alloy slurry, and the excess nickel-titanium alloy slurry was scraped off the surface to obtain For the polyurethane foam of the nickel-titanium alloy slurry, the polyurethane foam containing the nickel-titanium alloy slurry is taken out with a clip and put into a porcelain plate.

[0062] 2. Place the porcelain plate containing the polyurethane foam ...

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Abstract

The invention discloses a preparation method of a pore-controllable porous nickel-titanium shape memory alloy, and the preparation method comprises the following steps: uniformly mixing an additive solution and nickel-titanium alloy powder to obtain nickel-titanium alloy slurry; filling a porous template with the nickel-titanium alloy slurry to obtain a porous template containing nickel-titanium alloy slurry; performing vacuum drying on the porous template containing nickel-titanium alloy slurry to obtain a biscuit; in a protective gas atmosphere, heating the biscuit to 400-500 DEG C and performing degreasing treatment to obtain degreased biscuit; in a vacuum condition, sintering the degreased biscuit at 1,000-1,200 DEG C for 120-240 minutes so as to obtain the pore-controllable porous nickel-titanium shape memory alloy. In the preparation method, the preparation process is simple, the equipment is simple, the cost is low, the pore performance of the porous nickel-titanium shape memory alloy can be adjusted, and the prepared pore-controllable porous nickel-titanium shape memory alloy has high porosity and uniform pores and a three-dimensional communication structure.

Description

technical field [0001] The invention relates to biomedical materials, in particular to a preparation method of a porous nickel-titanium shape memory alloy with controllable pores. Background technique [0002] In terms of bone repair, bone tissue engineering has always had great potential, and the selection and design of implanted scaffold materials is the top priority. Scaffold materials not only need to have an initial stable structure and good biocompatibility in the human environment, but also provide a carrier for the regeneration of surrounding bone and other tissues and organs, and can provide structural support and support during bone growth and remodeling. Mechanical strength, ultimately ensuring bone repair and healing. [0003] Nickel-titanium (NiTi) alloy is an excellent scaffold material. In addition to the unique shape memory effect and excellent biocompatibility, mechanical properties and corrosion resistance, the near-equal atomic ratio nickel-titanium allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08A61L27/06
Inventor 李婧阮建明
Owner CENT SOUTH UNIV
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