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A kind of ti-39nb-6zr biomedical porous titanium alloy and preparation method thereof

A ti-39nb-6zr, biomedical technology, applied in the field of biomedical materials and porous materials, can solve the problems of stress shielding, implant loosening and failure, etc., and achieve the effect of simple preparation method and good matching relationship

Active Publication Date: 2018-09-28
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastic modulus of titanium and titanium alloys is much higher than that of human bone tissue, and once the elastic modulus of the implant does not match the bone tissue, the implant will bear most of the biological stress, making it difficult for the surrounding bone tissue to Stimulated by biological stress, the bone tissue in this environment for a long time will gradually shrink and degenerate, eventually causing the loosening and failure of the implant, which cannot meet the long-term use requirements, resulting in the phenomenon of "stress shielding"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh 25g of alloy powder, add 0.8wt.% of polyethylene glycol binder, fully grind and mix; use ultra-high hydraulic tube expander to carry out pressing process on alloy powder, and the pressing pressure is 120MPa to obtain compact ;

[0028] (2) The compact sintering process is carried out in an argon tube sintering furnace, and the initial heating rate is controlled at 5°C / min. When the temperature rises to 250°C, keep it for 20 minutes to completely remove the binder; continue to heat up, and the heating rate is controlled at 1~10℃ / min, until it reaches 1100℃, the sintering time is 4h;

[0029] (3) After the sintering is completed, the sample is processed into a 9mm×9mm×10mm square sample and a Ф6×9mm cylinder (national standard GB / T7314-2005) for porosity and density measurement and room temperature compression test.

[0030] Pore ​​characteristics and mechanical properties of the material: Density 4.16g / cm 3 , porosity 23.6%, compressive strength 217.4MPa, ela...

Embodiment 2

[0032] (1) Weigh 25g of alloy powder, add 0.8wt.% of polyethylene glycol binder, fully grind and mix; use ultra-high hydraulic tube expander to carry out pressing process on alloy powder, and the pressing pressure is 160MPa to obtain compact ;

[0033] (2) The compact sintering process is carried out in an argon tube sintering furnace, and the initial heating rate is controlled at 5°C / min. When the temperature rises to 250°C, keep it for 20 minutes to completely remove the binder; continue to heat up, and the heating rate is controlled at 1~10℃ / min, until it reaches 1100℃, the sintering time is 4h;

[0034] (3) After the sintering is completed, the sample is processed into a 9mm×9mm×10mm square sample and a Ф6×9mm cylinder (national standard GB / T7314-2005) for porosity and density measurement and room temperature compression test.

[0035] Pore ​​characteristics and mechanical properties of the material: Density 4.35g / cm 3 , porosity 19.4%, compressive strength 226.3MPa, ela...

Embodiment 3

[0037] (1) Weigh 25g of alloy powder, add 0.8wt.% polyethylene glycol binder, fully grind and mix; utilize ultra-high hydraulic tube expander to carry out pressing process on alloy powder, and the pressing pressure is 140MPa to obtain compact ;

[0038] (2) The compact sintering process is carried out in an argon tube sintering furnace, and the initial heating rate is controlled at 5°C / min. When the temperature rises to 250°C, keep it for 20 minutes to completely remove the binder; continue to heat up, and the heating rate is controlled at 1~10℃ / min, until it reaches 1000℃, the sintering time is 4h;

[0039] (3) After the sintering is completed, the sample is processed into a 9mm×9mm×10mm square sample and a Ф6×9mm cylinder (national standard GB / T7314-2005) for porosity and density measurement and room temperature compression test.

[0040] Pore ​​characteristics and mechanical properties of the material: Density 4.18g / cm 3 , porosity 23.2%, compressive strength 210.4MPa, el...

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Abstract

The invention relates to a Ti-39Nb-6Zr biomedical porous titanium alloy and a preparation method thereof, belonging to the field of biomedical materials and porous materials. The alloy is composed of niobium, zirconium and titanium, wherein niobium is 39w%, zirconium is 6w%, and the balance is titanium; the porosity of the titanium alloy is 19.4%-42.1%. Prepare Ti-39Nb-6Zr alloy ingot by vacuum self-consumption melting method, and use rotating electrode atomization method to obtain spherical powder particles; select 100-150 mesh alloy powder, add binder, or ammonium bicarbonate pore-forming agent and bond agent, fully mixed, and pressed into a compact; the compact is sintered in an argon tube sintering furnace to completely remove the binder, or the pore-forming agent and the binder, and obtain a porous alloy. The elastic modulus of the alloy is 3.6GPa-12.4GPa, the tensile strength is 123.8MPa-347.5MPa, and has the advantages of low elastic modulus and good biocompatibility.

Description

technical field [0001] The invention relates to a Ti-Nb-Zr low elastic modulus porous titanium alloy and a preparation method thereof, in particular to a Ti-39Nb-6Zr biomedical porous titanium alloy and a preparation method thereof, belonging to the field of biomedical materials and porous materials. Background technique [0002] Due to their good biocompatibility, high strength, corrosion resistance, and low elastic modulus, titanium and titanium alloys have been used more and more in the field of biomedicine, such as artificial joints, artificial heart valves, and dental implants. body etc. The elastic modulus of titanium and titanium alloys is much higher than that of human bone tissue, and once the elastic modulus of the implant does not match the bone tissue, the implant will bear most of the biological stress, making it difficult for the surrounding bone tissue to Stimulated by biological stress, the bone tissue in this environment for a long time will gradually shrin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/08A61L27/06A61L27/56
CPCA61L27/06A61L27/56C22C14/00B22F3/1121A61L2430/02B22F2998/10B22F1/10B22F3/02B22F9/08C22C1/03
Inventor 宋晓云惠松骁叶文君于洋刘睿
Owner GRIMAT ENG INST CO LTD
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