The preparation method of sic/stainless steel composite vascular stent material

A vascular stent and stainless steel technology, which is applied in the field of preparation of a SiC/stainless steel composite vascular stent material, can solve the problems of vessel wall damage, stenosis, technical complexity, etc., and achieve the effect of uniform internal tissue, good mechanical properties, and simple operation

Inactive Publication Date: 2011-12-21
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0004] However, the metal stent covering technology has many problems such as high cost, complex technology, or falling off of the covering coating
In particular, the inorganic coating is relatively brittle. When the stent is stretched, it is easy to break and fall off from the stent to form local corrosion spots. Moreover, the inorganic coating is mostly hard and easy to cause damage to the vessel wall, so it is only used for thinner stents. coating
[0005] The question is raised: the main way to modify metal vascular stent materials is the metal stent covering technology, so is there a new material preparation that breaks through the existing model and can take advantage of the advantages of inorganic SiC while avoiding the shortcomings of the metal stent covering technology? method? To prepare SiC and stainless steel composite anti-restenosis metal stent materials to achieve the purpose of reducing the surface potential of the stent and ensuring the strength and toughness of the stent

Method used

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  • The preparation method of sic/stainless steel composite vascular stent material
  • The preparation method of sic/stainless steel composite vascular stent material
  • The preparation method of sic/stainless steel composite vascular stent material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Choose the best median diameter D 50 20μm 304L stainless steel powder, the best median diameter D 50 For SiC powder of 60 μm, the batching calculation is carried out according to the volume ratio of SiC:304L=75:25. According to the calculated value, use the electronic balance to weigh the required raw materials, and record the actual weighing results during the actual weighing. The recording results are shown in Table 1.

[0024] The quality of different raw materials in the batching of table 1 embodiment 1

[0025]

[0026] Put the weighed SiC powder and 304L stainless steel powder into the stainless steel ball mill tank, and then put them into 300 small stainless steel balls and 150 medium stainless steel balls of the QM-3SP4J planetary ball mill, and then Put in 150mL of distilled water. After everything has been filled, place the ball mill jar in the stand of the ball mill and secure it. After the ball mill tank is fixed, set the ball mill parameters as foll...

Embodiment 2

[0030] Choose the best median diameter D 50 304L stainless steel powder of 15μm, the best median diameter D 50 For SiC powder of 80 μm, the batching calculation is carried out according to the volume ratio of SiC:304L=50:50. According to the calculated value, use the electronic balance to weigh the required raw materials, and record the actual weighing results during the actual weighing. The recording results are shown in Table 2.

[0031] The quality of different raw materials in the batching of table 2 embodiment 2

[0032]

[0033]Put the weighed SiC powder and 316L stainless steel powder into the stainless steel ball mill tank, and then put them into 300 small stainless steel balls and 150 medium stainless steel balls of the QM-3SP4J planetary ball mill, and then Put in 200mL absolute ethanol. After everything has been filled, place the ball mill jar in the stand of the ball mill and secure it. After the ball mill tank is fixed, set the ball mill parameters as foll...

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Abstract

The invention discloses a preparation method of a SiC/stainless steel composite blood vessel stent material, which comprises the steps of material proportioning, material mixing and sintering. The invention provides an optimized process for preparing the SiC/stainless steel composite blood vessel stent material by a hot pressing sintering method. The method has the advantages that the surface potential of a metal stent is effectively reduced through the good semiconductor property of ceramic whiskers, so the anti-blood-vessel-narrowing function is given to the blood vessel stent material, and simultaneously, the goal of enhancing the anti-corrosive performance of the stainless steel is also realized. The SiC/stainless steel composite materials prepared by the method provided by the invention can be widely applied to the preparation of the blood vessel stent for medical purposes.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a SiC / stainless steel composite vascular stent material used for medical treatment. Background technique [0002] At present, vascular metal stents have been widely used in the medical treatment of cardiovascular stenosis due to their good flexibility, biocompatibility and easy production and processing. A variety of materials have been developed for making metal stents, such as medical stainless steel, cobalt alloys, titanium alloys, and nickel-titanium alloys. With the application and research of metal stents, it has been found that metals have high surface potential and adsorb negative particles, which have the characteristics of causing thrombosis. Therefore, the research on the modification of vascular metal stents has been continuous, and the metal stent covering technology is an earlier study. A metal stent surface modification techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C1/05A61F2/82
Inventor 廖晓玲徐文峰李波
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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