Method for modifying ZrC coating on surface of intravascular stent
A vascular stent and coating technology, which is applied in the field of ion nitriding modification of ZrC coating on the surface of vascular stents, can solve the problems that the corrosion resistance needs to be improved, the corrosion resistance of bare metal stents cannot be satisfied, and the corrosion resistance can be improved. Effect
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Embodiment 1
[0019] A modification method of ZrC coating on the surface of vascular stent, comprising the following steps:
[0020] The medical 316L stainless steel is used as the support substrate, and the substrate is pretreated. The pretreatment includes pickling, grinding, cleaning and drying. # and 1200# sandpaper, cleaning with deionized water and ultrasonic assisted cleaning, drying in a protective atmosphere.
[0021] Put the dried substrate into a magnetron sputtering coating machine, pass in argon gas, and carry out plasma bombardment on the substrate.
[0022] Using Zr-7.8wt% graphite composite target as the sputtering source and argon as the working gas, ZrC coating was deposited on the surface of the support substrate, wherein the background vacuum degree was 5×10 -5 Pa, the argon gas flow rate is 50 sccm, the substrate temperature is 180°C, the sputtering pressure is 3.0Pa, and the sputtering power is 80W.
[0023] Put the vascular stent covered with ZrC coating into the io...
Embodiment 2
[0026] A modification method of ZrC coating on the surface of vascular stent, comprising the following steps:
[0027] The medical 316L stainless steel is used as the support substrate, and the substrate is pretreated. The pretreatment includes pickling, grinding, cleaning and drying. # and 1200# sandpaper, cleaning with deionized water and ultrasonic assisted cleaning, drying in a protective atmosphere.
[0028] Put the dried substrate into a magnetron sputtering coating machine, pass in argon gas, and carry out plasma bombardment on the substrate.
[0029] Using Zr-7.8wt% graphite composite target as the sputtering source and argon as the working gas, ZrC coating was deposited on the surface of the support substrate, wherein the background vacuum degree was 5×10 -5 Pa, the argon gas flow rate is 50 sccm, the substrate temperature is 180°C, the sputtering pressure is 3.0Pa, and the sputtering power is 80W.
[0030] Put the ZrC-coated vascular stent into the ion nitriding fu...
Embodiment 3
[0033] A modification method of ZrC coating on the surface of vascular stent, comprising the following steps:
[0034] The medical 316L stainless steel is used as the support substrate, and the substrate is pretreated. The pretreatment includes pickling, grinding, cleaning and drying. # and 1200# sandpaper, cleaning with deionized water and ultrasonic assisted cleaning, drying in a protective atmosphere.
[0035] Put the dried substrate into a magnetron sputtering coating machine, pass in argon gas, and carry out plasma bombardment on the substrate.
[0036] Using Zr-7.8wt% graphite composite target as the sputtering source and argon as the working gas, ZrC coating was deposited on the surface of the support substrate, wherein the background vacuum degree was 5×10 -5 Pa, the argon gas flow rate is 50 sccm, the substrate temperature is 180°C, the sputtering pressure is 3.0Pa, and the sputtering power is 80W.
[0037] Put the vascular stent coated with ZrC into the ion nitridi...
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