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Method for TiNi alloy stent with phosphorus injection and slow neutron irradiation activation

A slow neutron and alloy technology, applied in the field of phosphorus injection of TiNi alloy stents, can solve the problem of weak radiation penetration

Inactive Publication Date: 2009-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of weak ray penetration after phosphorus injection of TiNi alloy stent in the prior art, and provide a method for slow neutron irradiation activation after phosphorus injection of TiNi alloy stent

Method used

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  • Method for TiNi alloy stent with phosphorus injection and slow neutron irradiation activation
  • Method for TiNi alloy stent with phosphorus injection and slow neutron irradiation activation
  • Method for TiNi alloy stent with phosphorus injection and slow neutron irradiation activation

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specific Embodiment approach 1

[0010] Specific Embodiment 1: In this embodiment, the method for slow neutron irradiation activation after phosphorus injection of TiNi alloy stent is realized according to the following steps: 1. Chemical polishing: put the TiNi alloy stent into HF / HNO at a temperature of 40-60°C 3 / H 2 Soak in O system for 5-15s, then put it into acetone and ultrasonically clean it for 20-60 minutes, and then dry it; 2. Phosphorus injection: use red phosphorus as the ion source, heat the ion source to vaporize, pulse high-pressure to ionize it, and then When the injection voltage is 30-90KV, the injection amount is 4×10 17 P / cm 2 , The pulse current is 20-30A, the frequency is 100-200Hz, the pulse width is 40-60μs, the first gate is 0.3-1kV, and the second gate is 0.5-1.5kV. Phosphorus is injected under the conditions; 3. Slow neutron irradiation activation: At a slow neutron flux of 5.88×10 17 n / m 2 s. The dose of slow neutron radiation is 1.69×10 22 n / m 2 Under the conditions of irra...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment is different from Embodiment 1 in that the temperature in step 1 is 45-55°C. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the temperature in step 1 is 50°C. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for irradiation and activation of slow neutrons after a TiNi alloy stent is injected with phosphorus, and relates to a method for phosphorus injection for the TiNi alloy stent. The method solves the problem that rays have weak penetrability after the TiNi alloy stent is injected with the phosphorus in the prior art. The method comprises the following steps of: 1, chemical polishing; 2, phosphorus injection; and 3, irradiation and activation of the slow neutrons; and the TiNi alloy stent injected with the phosphorus is obtained. The TiNi alloy stent which is prepared by the method and is injected with the phosphorus has strong ray penetrability. The method is simple and has convenient operation.

Description

technical field [0001] The invention relates to a method for injecting phosphorus into a TiNi alloy bracket. Background technique [0002] TiNi alloy is an ideal material for vascular stents, especially for the manufacture of fine coronary stents and drug-coated stents. TiNi alloy stents have the advantages of simple implantation, easy positioning, good adhesion to the vessel wall, and uniform force. It has a very broad application prospect. [0003] Vascular stents need to be implanted into the human body through X-ray interventional technology for the treatment of acute vascular occlusion, dissection and restenosis. The therapeutic effect of vascular stent is closely related to whether it can be accurately implanted into the lesion. For the same material, the larger the diameter of the stent wire or the thicker the vessel wall, the better the X-ray visibility and the higher the accuracy of implantation. The incidence of restenosis of blood vessels also increases accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/12A61F2/82A61L27/06
Inventor 高智勇赵兴科隋解和蔡伟吴冶
Owner HARBIN INST OF TECH
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