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Preparation method of antibacterial Ti-Nb-Zr-Ag alloy ingot

A ti-nb-zr-ag and ti-nb-zr technology, applied in the field of biomedical titanium metal preparation, can solve the problems of poor bonding of surrounding body tissues, susceptibility to infection, stress shielding, and mismatching elastic modulus, etc. Effect of improving stress shielding phenomenon, reducing difference in melting point, and preventing oxidation

Inactive Publication Date: 2018-12-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of susceptibility to infection and stress shielding phenomenon in the current clinical application of medical titanium and its alloys. The elastic modulus of the implant and the bone tissue does not match and the susceptibility to infection leads to problems such as poor integration with the surrounding body tissue.

Method used

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  • Preparation method of antibacterial Ti-Nb-Zr-Ag alloy ingot
  • Preparation method of antibacterial Ti-Nb-Zr-Ag alloy ingot
  • Preparation method of antibacterial Ti-Nb-Zr-Ag alloy ingot

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Weigh Ti, Nb, Zr, Ag metal ingots with purity of 99.995%, 99.95%, 99.5% and 99.99% according to the mass percentage of Ti 62%, Nb 15%, Zr 13%, Ag 10%, respectively.

[0023] (2) Put the weighed Ti, Nb, Zr metal ingots and Ag metal ingots into two different melting pools, and then vacuumize the closed melting furnace to 7.0×10 -4 Pa, filled with high-purity argon gas to 0.07MPa, first use a tungsten arc gun to melt and align it with the molten pool where Ti, Nb, and Zr metal ingots are placed, and start the arc in a high-purity argon atmosphere, adjust the melting current to 250A, and magnetic induction The current is 20A. After the metal is completely melted and fully mixed, the arc is turned off; the molten metal ingot is turned over, and the melting is repeated 5 times, and the Ti-Nb-Zr alloy with uniform composition is obtained with the furnace cooling.

[0024] (3) Use a manipulator to shovel the obtained Ti-Nb-Zr alloy ingot into the molten pool where the Ag me...

Embodiment 2

[0027] (1) Weigh Ti, Nb, Zr, and Ag metal ingots with a purity of 99.995%, 99.95%, 99.5%, and 99.99% according to the mass percentages of Ti 56%, Nb 34%, Zr 6%, and Ag 4%, respectively.

[0028] (2) Put the weighed Ti, Nb, Zr metal ingots and Ag metal ingots into two different molten pools, and then vacuumize the closed melting furnace to 9.0×10 -4 Pa, filled with high-purity argon gas to 0.05MPa, first use a tungsten arc gun to melt and align it with the molten pool where Ti, Nb, and Zr metal ingots are placed, and start the arc in a high-purity argon gas atmosphere, adjust the melting current to 350A, magnetic induction The current is 25A, and the arc is turned off after the metal is completely melted and fully mixed; the molten metal ingot is turned over, and the melting is repeated 6 times, and the Ti-Nb-Zr alloy with uniform composition is obtained with the furnace cooling.

[0029] (3) Use a manipulator to shovel the obtained Ti-Nb-Zr alloy ingot into the molten pool whe...

Embodiment 3

[0032] (1) Weigh Ti, Nb, Zr, Ag metal ingots with purity of 99.995%, 99.95%, 99.5% and 99.99% according to the mass percentage of Ti 52%, Nb 38%, Zr 8%, Ag 2%, respectively.

[0033] (2) Put the weighed Ti, Nb, Zr metal ingots and Ag metal ingots into two different melting pools, and then vacuumize the closed melting furnace to 5.0×10 -3 Pa, filled with high-purity argon gas to 0.05MPa, first use a tungsten arc gun to melt and align it with the molten pool where Ti, Nb, and Zr metal ingots are placed, and start the arc in a high-purity argon gas atmosphere, adjust the melting current to 350A, magnetic induction The current is 25A, and the arc is turned off after the metal is completely melted and fully mixed; the molten metal ingot is turned over, and the melting is repeated 6 times, and the Ti-Nb-Zr alloy with uniform composition is obtained with the furnace cooling.

[0034] (3) Use a manipulator to shovel the obtained Ti-Nb-Zr alloy ingot into the molten pool where the Ag m...

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Abstract

The invention discloses a preparation method of an antibacterial Ti-Nb-Zr-Ag alloy ingot, and belongs to the technical field of biomedical material preparation. A material of the antibacterial Ti-Nb-Zr-Ag alloy ingot is composed of Ti, Nb, Zr and the antibacterial element Ag, wherein the mass percentages are 52-62% of Ti, 15-38% of Nb, 5-13% of Zr, and 2-10% of Ag; the Ti, Nb, Zr metal ingots andthe Ag metal ingot are proportioned and weighted according to the ratio of composition and then put into two different melting pools, and step-by-step smelting is conducted; and the Ti-Nb-Zr alloy ingot is melted by means of electric arc smelting through high current and high electromagnetic stirring current action, and the difference between the melting points of alloy and the Ag is reduced, so that the Ti-Nb-Zr-Ag alloy ingot with the component homogenization can be smelted with lower current subsequently. By means of the preparation method, the composition and the texture of the Ti-Nb-Zr-Agalloy ingot are uniform, the elastic modulus is low (39.7-55.6 GPa), the compressive strength is higher (1098-1430 MPa), and the stress shielding phenomenon and antimicrobial properties of the medical titanium metal are improved advantageously.

Description

technical field [0001] The invention relates to a method for preparing an antibacterial Ti-Nb-Zr-Ag alloy ingot, belonging to the field of biomedical titanium metal preparation. Background technique [0002] Among the artificial biomedical metal materials currently in clinical use, titanium and titanium alloys are widely used in the replacement and repair of hard tissues such as artificial joints, spinal orthopedic internal fixation systems, and dental implants due to their excellent mechanical properties. At present, clinical medical titanium has a certain biocompatibility, but it does not have antibacterial properties. Long-term implantation in the human body will cause bacteria and other microorganisms to adhere to its surface, resulting in infection. This type of infection is called "biomaterial-related infection." (biomaterial-centered infection, BCI)". Once BCI occurs, it will have catastrophic consequences for patients, which will lead to the risk of patients needing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C14/00
CPCC22C1/03C22C14/00
Inventor 胡红艳何正员柯尊瑜蒋业华
Owner KUNMING UNIV OF SCI & TECH