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Bioactive Ti-Ta-Nb alloy bone implant and forming method thereof

A ti-ta-nb, bioactive technology, applied in the field of additive manufacturing, can solve the problems of uneven segregation of alloy components, low diffusion coefficient, and reduced elastic modulus, so as to prolong the fatigue cycle, simplify the process, and improve the strength. and the effect of toughness

Inactive Publication Date: 2020-02-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In traditional technology, Ta and Nb elements are mainly used to alloy with Ti to form β-phase titanium alloy to reduce the elastic modulus; due to technical limitations and high melting points of Ta and Nb elements, such elements in the alloy cannot be in large quantities (>30wt%) Introduced into Ti, the melting point difference between Ta and Nb and Ti is close to 1000-1400 degrees, and the diffusion coefficient between Ti and Ta and Nb elements is not high, so too high content will lead to severe alloy composition using casting or traditional metallurgical methods. Uneven segregation, fatigue failure, repeated remelting is required for preparation, wasting manpower and material resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The bone implant prepared by the forming method of the bioactive Ti-Ta-Nb alloy bone implant provided in Example 1 of the present invention is suitable for young people, and the method mainly includes the following steps:

[0045] (1) Scan the bone defect of the patient through CT / MRI, build a 3D model based on the obtained CT data and export the STL format file of the 3D model, and then import it into the laser selective melting forming equipment.

[0046] (2) Weighing Ta powder, Nb powder, Zr powder and pure titanium (Ti) powder and performing mechanical ball milling to mix uniformly, thereby obtaining uniformly mixed powder raw materials. Among them, due to the high bone strength of young people, the content of Ta and Nb needs to be increased. The ball-to-material ratio used in the mixing process of Ta powder is 3:1, using an all-round planetary ball mill, and using a ball mill tank that can be vacuumed. Argon is introduced into the tank to prevent the powder from be...

Embodiment 2

[0053] The bone implant prepared by the forming method of the bioactive Ti-Ta-Nb alloy bone implant provided in Example 2 of the present invention is suitable for middle-aged people, and the method mainly includes the following steps:

[0054] (1) Scan the bone defect of the patient through CT / MRI, construct a three-dimensional model of the patient's defect part according to the obtained CT data and export the STL format file of the three-dimensional model, and then import it into the laser selective melting forming equipment.

[0055] (2) Weighing Ta powder, Nb powder, Zr powder and pure titanium (Ti) powder for mechanical ball milling and mixing to obtain uniformly mixed powder raw materials. Due to the decline in bone strength of middle-aged people, the Ta content is slightly lower. The ball-to-material ratio used in the mixing process of Ta powder is 2:1, using an all-round planetary ball mill, and using a ball mill tank that can be vacuumed. Feed argon to avoid powder oxi...

Embodiment 3

[0062] The bone implant prepared by the forming method of the bioactive Ti-Ta-Nb alloy bone implant provided in Example 3 of the present invention is suitable for the elderly, and the method mainly includes the following steps:

[0063] (1) Scan the bone defect of the patient through CT / MRI, build a 3D model based on the obtained CT data and export the STL format file of the 3D model, and then import it into the laser selective melting forming equipment.

[0064] (2) Weighing Ta powder, Nb powder, Zr powder and pure titanium (Ti) powder for mechanical ball milling and mixing to obtain uniformly mixed powder raw materials. Due to the low bone strength of the elderly, the elastic modulus decreases, the Ta content is slightly lower, and the Nb and Zr contents need to be increased; the ball-to-material ratio used in the mixing process of Ta powder is 3:1, and the omni-directional planetary ball mill is used. In the ball milling tank with air pumping, argon gas is introduced into t...

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Abstract

The invention belongs to the technical field related to additive manufacturing, and discloses a bioactive Ti-Ta-Nb alloy bone implant and a forming method thereof. The method comprises the following steps that (1) powder raw materials which are uniformly mixed are provided, the powder raw materials are prepared in situ, the raw materials comprise Ta powder, Nb powder and pure Ti powder, in the powder raw materials, the mass percentage of the Ta powder is 20wt%-30wt%, and the mass percentage of the Nb powder is 15wt%-40wt%; and (2) the powder raw materials are taken as raw materials and are subjected to laser selective melting to form the bone implant based on a three-dimensional model of a defect part of a user, the bone implant is of a porous structure, wherein the Ta powder and the Nb powder are melted and achieve diffusion convection current under the action of laser beams, and the Ta powder and the Nb powder are induced to form a Ta2O5 thin film and a Nb2O5 thin film respectively.According to the bioactive Ti-Ta-Nb alloy bone implant and the forming method thereof, the cost is reduced, the flexibility is good, and the applicability is high.

Description

technical field [0001] The invention belongs to the technical field related to additive manufacturing, and relates to a method for preparing high bioactivity and high strength Ti-Ta-Nb bone implant in situ by 3D printing; more specifically, it relates to a bioactivity Ti-Ta-Nb alloy bone implant. Implants and methods of forming them. Background technique [0002] In recent years, with the update and iteration of bone implant materials, traditional titanium alloy (Ti and Ti6Al4V) bone implants are widely used in bone implants due to their high strength, high corrosion resistance and good biocompatibility. Among the replacement materials, it has played a certain role in bone repair. [0003] With a large number of clinical applications, it has been found that traditional titanium alloys can only play a certain supporting role, and the stress shielding effect caused by the mismatch of mechanical indicators such as elastic modulus will cause osteoporosis. Porous bone implants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/08B22F3/11C22F1/18C22F1/02A61L27/06A61L27/50A61L27/56B33Y10/00B33Y70/10B33Y80/00
CPCA61L27/06A61L27/50A61L27/56A61L2430/02B22F3/11B33Y10/00B33Y70/00B33Y80/00C22C14/00C22C30/00C22F1/02C22F1/183
Inventor 魏青松赵丹雷刘洁
Owner HUAZHONG UNIV OF SCI & TECH
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