A platinum-chromium steel for cardiovascular stents
| Autor: | Jon S. Stinson, Barry O'brien, Steve R. Larsen, William M. Carroll, Michael J. Eppihimer |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Surface Properties Alloy Biophysics chemistry.chemical_element Bioengineering engineering.material Cardiovascular System Corrosion Biomaterials Matrix (chemical analysis) Chromium X-ray photoelectron spectroscopy Tensile Strength Ultimate tensile strength Materials Testing Alloys Humans Cell Proliferation Photoelectron Spectroscopy Metallurgy technology industry and agriculture Temperature Endothelial Cells equipment and supplies Oxygen Solid solution strengthening chemistry Mechanics of Materials Steel Ceramics and Composites engineering Stents Platinum |
| Zdroj: | Biomaterials. 31(14) |
| ISSN: | 1878-5905 |
| Popis: | The desire to reduce the strut thickness of cardiovascular stents has driven the development of a new high strength radiopaque alloy, based on additions of platinum to a chromium-rich iron based matrix. This paper reports on initial development of the alloy and the rationale for selection of the composition. Data is presented for tensile and microstructural characterization, surface oxide analysis, corrosion resistance and endothelial cell response of the alloy. The results demonstrate the solid solution strengthening effect of the platinum, with an average yield strength of 480 MPa achieved. The material surface consists of primarily chromium oxide which contributes to the high corrosion resistance observed. The cell assay result suggests that surfaces of this Pt-enhanced alloy endothelialize in a manner comparable to stainless steel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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