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Method for preparing biological medical porous titanium material

A technology of biomedical and porous titanium, which is applied in the field of preparing biomedical porous titanium materials, can solve the problems of high vacuum degree or airtightness, difficult product grain and pore size, and complicated process, so as to improve performance and reduce energy consumption Consumption, the effect of reducing the loss of equipment

Inactive Publication Date: 2011-04-20
KUNMING METALLURGY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the process is very complicated, the vacuum degree or airtightness is high, the control is difficult, the sintering temperature is high, the sintering time is long, the grain and pore size of the product are difficult to control, and the manufacturing cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 - Preparation of pure titanium biomedical porous material

[0020] Take spherical titanium powder with particle size ≤36μm and purity ≥99.9% as the basic material, and spherical titanium hydride particles as foaming agent, the particle sizes are: ≤48μm, 48~74μm, 75~165μm. The volume fraction of the blowing agent is set to be 10 vol.%, 20 vol.%, 30 vol.%, 40 vol.%, 50 vol.%, and 60 vol.%. Weigh the raw material powder according to the stated ratio, fully mix the weighed titanium powder and titanium hydride powder and pour it into the mold, and apply the same axial pressure to the powder sample, the pressure value is 1-5MPa . Then, while maintaining a constant pressure, a pulse voltage is applied to the powder, and the value of the pulse current is 1000A to generate plasma to activate the surface of the mixed powder material particles, and the activation time is 50s. Third, close the pulse power circuit, remove the applied pressure, and heat the mixed powder ...

Embodiment 2

[0021] Example 2 - Preparation of Ti-Zr Alloy Biomedical Porous Materials

[0022] Take spherical titanium powder and zirconium powder (doping ratio: 5vol.%, 10vol.%, 15vol.%, 20vol.%) with particle size ≤74μm and purity >99.5% as basic materials, and spherical titanium hydride particles as foaming The particle size is: ≤48μm, 48~74μm, 75~165μm. The volume fraction of the blowing agent is set to be 10 vol.%, 20 vol.%, 30 vol.%, 40 vol.%, and 50 vol.%. Weigh the raw material powder according to the stated ratio, fully mix the weighed titanium powder and titanium hydride powder and pour it into the mold, and apply the same axial pressure to the powder sample, the pressure value is 1-5MPa . Then, under the condition of maintaining a constant pressure, a pulse voltage is applied to the powder, and the value of the pulse current is 1200A to generate plasma to activate the surface of the mixed powder material particles, and the activation time is 60s. Third, turn off the pulse ...

Embodiment 3

[0023] Example 3 - Preparation of Ti-Ta-Zr Alloy Biomedical Porous Materials

[0024] Take spherical titanium powder, tantalum powder (doping ratio: 2.5vol.%, 5vol.%, 7.5vol.%, 10vol.%) and zirconium powder (doping ratio: 5vol.%) with particle size ≤74μm and purity >99.5% .%, 10vol.%, 15vol.%, 20vol.%) as the basic material, spherical titanium hydride particles are used as the foaming agent, and the particle sizes are: ≤48μm, 48~74μm, 75~165μm. The volume fraction of the blowing agent is set to be 10 vol.%, 20 vol.%, 30 vol.%, 40 vol.%, and 50 vol.%. Weigh the raw material powder according to the stated ratio, fully mix the weighed titanium powder and titanium hydride powder and pour it into the mold, and apply the same axial pressure to the powder sample, the pressure value is 1-5MPa . Then, while maintaining a constant pressure, a pulse voltage is applied to the powder, and the value of the pulse current is 1500A to generate plasma to activate the surface of the mixed po...

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PUM

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Abstract

The invention discloses a method for preparing a biological medical porous titanium material, which comprises the following steps of: mixing titanium powder or titanium-alloy powder wtih titanium-hydride grains, applying pulsed voltage in a vacuum environment or under the protection of reducing gas to generate plasma for activating the grain surface of a mixed-powder material, rapidly heating the powder material to the temperature of 800-1100 DEG C by using direct current under normal pressure after finishing activation, then shutting down the direct current, and cooling to obtain the required material. The invention can realize the regulation and control for a pore structure within a larger range through regulating the quantity and the grain diameter proportion of metal powder and pore formers and controlling process parameters and essentially improves the performance of sintered materials. The method realizes low-temperature sintering, the sintering time is greatly shortened, and the temperature is greatly decreased. Compared with a traditional sintering process, the energy consumption quantity is decreased, and the equipment loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of medical support materials, and relates to a method for preparing a porous metal material, in particular to a method for preparing a biomedical porous titanium material. Background technique [0002] Titanium and titanium alloys are ideal metal implant materials due to their excellent corrosion resistance, biocompatibility, low density and high specific strength, and are widely used in clinical practice, such as artificial total pulp joints, artificial teeth, etc. Implants and artificial human spine joints, etc. However, compared with human bone, the Young's modulus of titanium alloy is higher, which can reach 100 GPa to 110 GPa, while the Young's modulus of human bone is only 10 GPa to 30 GPa. And the tensile strength, compressive strength and bending strength of human bone are much lower than titanium and titanium alloys, so these differences in mechanical properties make the interface be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C14/00
Inventor 胡曰博张军张新娜
Owner KUNMING METALLURGY COLLEGE
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