Biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy and its preparation method and biomedical material

A biomedical and memory alloy technology, applied in the field of alloy materials, can solve the problems of imaging artifacts, unfavorable diagnosis of diseases, etc., and achieve the effects of high elongation, good superelasticity and shape memory effect, and a wide range of use.

Active Publication Date: 2022-04-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology will generate a strong magnetic field, and the magnetic susceptibility of the traditional Ti-Ni alloy reaches 3.751×10 - 6 cm 3 g -1 , used in magnetic resonance imaging technology will cause serious imaging artifacts, which is not conducive to the diagnosis of the disease

Method used

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  • Biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy and its preparation method and biomedical material
  • Biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy and its preparation method and biomedical material
  • Biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy and its preparation method and biomedical material

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preparation example Construction

[0040] The present invention provides a preparation method of a biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy described in the above technical solution, comprising the following steps:

[0041] According to the element composition of the biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy described in the above technical scheme, the raw materials are blended and smelted, and cooled to obtain an ingot;

[0042] performing annealing treatment and first ice-water quenching on the ingot in sequence to obtain a quenched ingot;

[0043] Forging the quenched ingot to obtain a forging billet;

[0044] The forged billet is sequentially subjected to solid solution treatment and second ice-water quenching to obtain a biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy.

[0045] According to the elemental composition of the biomedical zirconium-based nickel-free low magnetic suscepti...

Embodiment 1

[0056] (1) Use an electronic balance to accurately weigh the raw materials Zr particles (99.9%), Nb particles (99.9%) and Sn particles (99.99%) for batching. In order to prevent volatilization during the Sn smelting process, first place some Zr particles in the crucible , then the Sn particles are evenly placed on the Zr particles, and finally the Nb particles and the remaining Zr particles are evenly placed on the Sn particles, wherein the part of the Zr particles accounts for 25% of the total mass of the Zr particles; Put it in a high-vacuum non-consumable arc melting furnace, under the protection of argon, carry out melting at 1900°C for 2.5 hours to obtain a melting solution; after cooling the melting solution, a button-shaped ingot with a mass of 400g is obtained;

[0057] (2) Heating the vacuum tube furnace to 1000°C, then placing the ingot in the vacuum tube furnace, annealing at 1000°C for 24 hours, and then quenching the annealed ingot with a mixture of ice and water t...

Embodiment 2

[0061] Prepare biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy according to the method of Example 1, the difference is that the composition of the obtained alloy is specifically Nb 8.46at.%, Sn 3.58at.%, and the balance Zr; the alloy is recorded as Zr-3.5Sn-8.5Nb alloy.

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Abstract

The invention provides a biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy, a preparation method thereof and a biomedical material, belonging to the technical field of alloy materials. The alloy provided by the invention includes 3.40-3.60 at.% of Sn, 7.40-8.60 at.% of Nb, and the balance is Zr. In the alloy provided by the invention, zirconium is used as the matrix, which is a common trace element in the human body, and the added elements Nb and Sn all have good biocompatibility; the zirconium alloy has two stable phases (β phase and α phase) And three metastable phases (α″ phase, α’ phase and ω phase), the phase composition can be effectively changed by adding specific content of Sn and Nb, so as to obtain a biomedical alloy with both superelasticity and shape memory effect. At the same time , the magnetic susceptibility of the alloy provided by the invention is 1.176×10 ‑6 ~1.294×10 ‑6 cm 3 g ‑1 , much lower than that of conventional Ti‑Ni alloys.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a biomedical zirconium-based nickel-free low magnetic susceptibility shape memory alloy, a preparation method thereof and a biomedical material. Background technique [0002] Shape memory alloys have the characteristics of shape memory effect (SME) and superelastic effect (SE), and are widely used in medicine. The shape memory alloys currently used in medicine are mainly Ti-Ni alloys. However, recent research results have shown that Ni is a poisonous element, and Ti-Ni alloys will be corroded to produce Ni ions. Excessive Ni ions in humans Inside the body it can cause allergies, inflammation and even cancer. Therefore, when designing biomedical shape memory alloys, it is necessary to choose non-toxic, non-allergenic and biocompatible elements as much as possible to avoid adverse reactions after implantation. In addition, with the continuous advancement of modern medical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C16/00B21J5/00C22F1/18A61B5/055
CPCC22C16/00B21J5/002C22F1/006C22F1/186A61B5/055
Inventor 刘立斌王东薛人豪吴迪章立钢
Owner CENT SOUTH UNIV
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