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A kind of nickel-titanium alloy stent surface treatment method

A nickel-titanium alloy and surface treatment technology, applied in the field of surface engineering technology and biomaterials, can solve problems such as safety doubts, prone to corrosion, and achieve the effect of enhancing adhesion

Active Publication Date: 2022-05-20
杭州联芳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because metal biomaterials are prone to corrosion in physiological environments, especially toxic and carcinogenic nickel ions can be released from Nitinol alloys, which makes people doubt the safety of Nitinol alloys as long-term implant materials.

Method used

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  • A kind of nickel-titanium alloy stent surface treatment method
  • A kind of nickel-titanium alloy stent surface treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for treating the surface of a nickel-titanium alloy stent is characterized in that it comprises the steps of:

[0019] (1) The nickel-titanium alloy bracket is first polished with water-grinding paper to remove the initial roughness of the surface, then cleaned in acetone and deionized water, and dried to obtain a bright surface;

[0020] (2) Use anodic oxidation technology to remove nickel in nickel-titanium alloy;

[0021] (3) Using the magnetron sputtering method, using the auxiliary effect of the electro-acoustic transducer, magnetron sputtering titanium nitride film layer on the surface of the nickel-titanium alloy support.

Embodiment 2

[0023] The working state of the composite magnetron sputtering deposition table: the mother deposition table 4 is fixed below the interior of the vacuum chamber 1, and the position is directly below the magnetron sputtering device 2, and the sub-deposition table 5 is connected to the top of the mother deposition table 4 through a motor device , and the table top of the sub-deposition table 5 can rotate horizontally, the metal wire is fixed on the bracket and placed on the surface of the sub-deposition table 5, and the sub-deposition table 5 rotates in the horizontal direction under the control of the motor, so that the sputtered metal is evenly deposited on the surface of the wire .

[0024] The electro-acoustic transducing device 3 is fixed on the parent deposition platform 4 and is level with the surface of the sub-deposition platform 5 . The electro-acoustic transducing device 3 is fixed on the mother deposition table 4 through the connecting piece 33, the acoustic waveguid...

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Abstract

The invention belongs to the field of surface engineering technology and biomaterials, in particular to a method for treating the surface of a nickel-titanium alloy bracket. A surface treatment method for a nickel-titanium alloy stent, which is characterized in that it includes the following steps: (1) first polish the nickel-titanium alloy stent with water abrasive paper to remove the initial roughness of the surface, then wash it in acetone and deionized water, and dry it to obtain brightness surface; (2) using anodic oxidation technology to remove nickel in nickel-titanium alloy; (3) using magnetron sputtering method, using the auxiliary effect of electroacoustic transducer, on the surface of nickel-titanium alloy bracket, magnetron sputtering nitrogen TiO film layer. The beneficial effects of the present invention: through intermittent sound wave control, the adhesive force on the surface layer of the metal wire can be effectively enhanced.

Description

technical field [0001] The invention belongs to the field of surface engineering technology and biomaterials, in particular to a method for treating the surface of a nickel-titanium alloy bracket. Background technique [0002] The shape memory effect, superelasticity and high damping of nickel-titanium alloy shape memory alloy make it have advantages that traditional internal fixation materials cannot match. It has been used as vascular stent, esophageal stent, bone plate, intramedullary nail, tooth root, blood filter and artificial heart pump, etc. However, because metal biomaterials are prone to corrosion in physiological environments, especially toxic and carcinogenic nickel ions can be released from Nitinol alloys, people have doubts about the safety of Nitinol alloys as long-term implant materials. . Studies have shown that nickel-titanium alloy corrosion products have a toxic effect on cells. The higher the concentration of corrosion products, the greater the effect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/06C23C14/58C25D11/02C23F17/00
CPCC23C14/0641C23C14/35C23C14/58C23F17/00C25D11/02
Inventor 丁红
Owner 杭州联芳科技有限公司
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