| Autor: |
Roman AM; Faculty of Materials Science and Engineering, 'Gheorghe Asachi' Technical University of Iasi, 41 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Cimpoeșu R; Faculty of Materials Science and Engineering, 'Gheorghe Asachi' Technical University of Iasi, 41 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Pricop B; Faculty of Materials Science and Engineering, 'Gheorghe Asachi' Technical University of Iasi, 41 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Cazacu MM; Physics Department, 'Gheorghe Asachi' Technical University of Iasi, 59A Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Zegan G; Faculty of Dental Medicine, 'Grigore T. Popa' University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania., Istrate B; Faculty of Mechanical Engineering, 'Gheorghe Asachi' Technical University of Iasi, 43 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Cocean A; Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University, 11 Carol I Blvd, 700506 Iasi, Romania.; Laboratory of Applied Meteorology and Climatology, A Building, Physics, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania., Chelariu R; Faculty of Materials Science and Engineering, 'Gheorghe Asachi' Technical University of Iasi, 41 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Moscu M; Faculty of Dental Medicine, 'Grigore T. Popa' University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania., Bădărău G; Faculty of Materials Science and Engineering, 'Gheorghe Asachi' Technical University of Iasi, 41 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Cimpoeșu N; Faculty of Materials Science and Engineering, 'Gheorghe Asachi' Technical University of Iasi, 41 Dimitrie Mangeron Blvd, 700050 Iasi, Romania., Ivănescu MC; Faculty of Dental Medicine, 'Grigore T. Popa' University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania. |
| Abstrakt: |
A new functional Fe-30Mn-5Si-xCu (x = 1.5 and 2 wt%) biomaterial was obtained from the levitation induction melting process and evaluated as a biodegradable material. The degradation characteristics were assessed in vitro using immersion tests in simulated body fluid (SBF) at 37 ± 1 °C, evaluating mass loss, pH variation that occurred in the solution, open circuit potential (OCP), linear and cyclic potentiometry (LP and CP), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and nano-FTIR. To obtain plates as samples, the cast materials were thermo-mechanically processed by hot rolling. Dynamic mechanical analysis (DMA) was employed to evaluate the thermal properties of the smart material. Atomic force microscopy (AFM) was used to show the nanometric and microstructural changes during the hot rolling process and DMA solicitations. The type of corrosion identified was generalized corrosion, and over the first 3-5 days, an increase in mass was observed, caused by the compounds formed at the metal-solution interface. The formed compounds were identified mainly as oxides that passed into the immersion liquid. The degradation rate (DR) was obtained as a function of mass loss, sample surface area and immersion duration. The dynamic mechanical behavior and dimensions of the sample were evaluated after 14 days of immersion. The nanocompounds found on the surface after atmospheric corrosion and immersion in SBF were investigated with the Neaspec system using the nano-FTIR technique. |
