Analysis and development of the adhesion of stent coatings

• Autorzy: Bognar E. , Ozsvath P. , Kertesz A. , Pelyhe L. , Devenyi L.
• Języki publikacji: EN

Abstrakty

EN

The influence of the surface roughness on adhesion strength of polyurethane coating on stainless steel alloy (316LVM) is introduced. These coatings are one of the development directions in coronary stent production. One of the widely spread stent base material is the 316LVM, so in the presented study these materials were involved. The samples were prepared by etching and electro-polishing. The current density and polishing time were changed to create samples with different surface roughness. After electro-polishing polyurethane (Chronoflex®) coating was applied. The adhesion of the coating on different surfaces was tested by scratch test (nano indenter technique). The increasing surface roughness gives stronger adhesion. According to our experiments it was concluded that the coronary stents, treated by etching without polishing could cut out the balloons during expansion, therefore the surface roughness should be under this value. It is recommended to use an electro-chemical treatment that is resulting Ra=1.5-2.0 μm roughness.

Słowa kluczowe

EN

coronary stents; polyurethane adhesion; 316LVM; surface roughness

PL

stenty wieńcowe; adhezja poliuretanu; 316LVM; chropowatość powierzchni

• Wydawca: Instytut Automatyzacji Procesów Technologicznych i Zintegrowanych Systemów Wytwarzania Politechniki Śląskiej
• Czasopismo: Selected Engineering Problems
• Rocznik: 2014
• Tom: nr 5
• Strony: 15--20
• Opis fizyczny: Bibliogr. 18 poz

Twórcy

autor

Bognar E.

• Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary

autor

Ozsvath P.

• Department of Vehicle Manufacturing and Repairing, Faculty of Transportation Engineering and Vehicle Engineering, Budapest University of Technology and Economics, Budapest, Hungary

autor

Kertesz A.

• Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary

autor

Pelyhe L.

• Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary

autor

Devenyi L.

• Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary

Bibliografia

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