Preparation technology for bionic ceramic/metal laminating composite support coating

A metal lamination and composite stent technology, applied in the direction of metal material coating process, coating, stent, etc., can solve the problems of coating brittleness and insufficient binding force, and achieve the improvement of anticoagulation and good biocompatibility. Effect

Inactive Publication Date: 2012-08-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the main drawbacks of inorganic coatings for metal stents are the brittleness of the coatings and insufficient adhesion

Method used

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  • Preparation technology for bionic ceramic/metal laminating composite support coating
  • Preparation technology for bionic ceramic/metal laminating composite support coating
  • Preparation technology for bionic ceramic/metal laminating composite support coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation process of biomimetic ceramic / metal laminated composite stent coating, the steps are:

[0026] a. First, the Ta layer was deposited by double-cathode plasma sputtering. The process parameters were as follows: target voltage 600V, workpiece voltage 280V, distance between target and workpiece 15mm, working pressure 35Pa, deposition temperature 800℃; sputtering time 15min, obtained 200nm thick Ta layer.

[0027] b. Then perform ion oxidation, and the process parameters are as follows: workpiece voltage 600V, oxidation temperature 500°C, working pressure 35Pa, oxygen partial pressure 0.5Pa, ion oxidation for 8min;

[0028] c. Deposit the Au layer by double-cathode plasma sputtering, the process parameters are as follows: target voltage 600V, workpiece voltage 220V, distance between target and workpiece 15mm, working pressure 35Pa, deposition temperature 400°C; sputtering time 8min, obtained 20nm thick Au layer. Repeat steps a-c at least 30 times to obtain ...

Embodiment 2

[0035] The preparation process of biomimetic ceramic / metal laminated composite stent coating, the steps are:

[0036] a. First, the Ta layer was deposited by double-cathode plasma sputtering. The process parameters were as follows: target voltage 650V, workpiece voltage 300V, distance between target and workpiece 20mm, working pressure 35Pa, deposition temperature 650℃; sputtering time 20min, obtained 200nm thick Ta layer;

[0037]b. Then perform ion oxidation, the process parameters are as follows: workpiece voltage 850V, oxidation temperature 600°C, working pressure 35Pa, oxygen partial pressure 1 Pa, ion oxidation 10min;

[0038] c. Deposit the Mg layer by double-cathode plasma sputtering. The process parameters are as follows: target voltage 650V, workpiece voltage 250V, distance between target and workpiece 20mm, working pressure 35Pa, deposition temperature 450°C; sputtering time 10min, obtain 20nm For a thick Mg layer, repeat steps a-c at least 30 times to obtain a lam...

Embodiment 3

[0044] The preparation process of the biomimetic ceramic / metal laminated composite stent coating is characterized in that the steps are:

[0045] a. First, the Ta layer is deposited by double-cathode plasma sputtering. The process parameters are as follows: target voltage 500V, workpiece voltage 250V, distance between target and workpiece 10mm, working pressure 35Pa, deposition temperature 450°C; sputtering time 10min, obtain 100nm Thick Ta layer;

[0046] b. Then perform ion oxidation, the process parameters are as follows: workpiece voltage 650V, oxidation temperature 450°C, working pressure 35Pa, oxygen partial pressure 0.1Pa, ion oxidation for 5min;

[0047] c. Deposit Au layer by double-cathode plasma sputtering, the process parameters are as follows: target voltage 400V, workpiece voltage 200V, distance between target and workpiece 10mm, working pressure 35Pa, deposition temperature 250°C; sputtering time 5min, obtain 10nm thickness Au layer, repeat steps a-c more than ...

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Abstract

Preparation technology for a bionic ceramic / metal laminating composite support coating includes steps of a, performing double-cathode plasma sputtering deposition for a Ta layer to obtain a Ta layer with the thickness of 100-200nm at first; b, performing ion oxidation for 5-10min; and c, performing double-cathode plasma sputtering decomposition for an Au or Mg layer to obtain an Au or Mg layer with the thickness of 10-20nm, and repeating the steps a, b and c to obtain a laminating coating. Sputtered targets include targets made of one of Au and Mg and pure-Ta targets; and materials of workpieces include 316L stainless steel. The Ta2O5 layer in the coating has good corrosion resistance and blood compatibility, the metal Au or Mg layer has low elastic modulus and good biocompatibility, toughness of the coating can be increased, and furthermore, bonding strength of the coating and a base material can be improved.

Description

[0001] [0002] technical field [0003] The invention provides a method for preparing bionic Ta 2 o 5 A new method for coating Au(Mg) laminated composite scaffolds. It is suitable for preparing coatings with high corrosion resistance, good blood compatibility, high binding force and strong toughness on the surface of metal stents. It involves double cathode plasma sputtering deposition and ion oxidation composite process as well as the structural design and selection of coating materials field. [0004] Background technique [0005] With the acceleration of population aging and the improvement of human living standards, which have brought some negative impacts on people's health, the incidence of cardiovascular diseases such as coronary heart disease, atherosclerosis, and heart valve disease has been increasing and has become a threat One of the major diseases of human life. Statistics show that: at the beginning of the 21st century, about 17 million people died of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C14/14C23C14/34C23C8/36A61F2/82A61L27/00
Inventor 徐江
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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