ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Pulsed laser deposition was used to obtain functionally graded bioactive glass coatings ontitanium substrates. An UV KrF* (λ=248 nm, τ〉7 ns) excimer laser was used for the multi-pulseirradiation of the targets. The depositions were performed in oxygen while keeping substratetemperature at 400°C. We used sintered glass targets in the system SiO2-Na2O-K2O-CaO-MgOP2O5that differed in SiO2 content, which was either 57 wt.% (6P57) or 61 wt.% (6P61). A glass6P61 was used as the first layer in direct contact with the metallic substrate, while the outerbioactive layer was made of glass 6P57. Both the bioactive coatings and the bulk glasses wereanalyzed by Fourier transform infrared spectrometry (FTIR), grazing incidence X-ray diffraction(GIXRD), and scanning electron microscopy (SEM). The FTIR spectra of the glass powders andglass coatings showed the main vibration modes of the Si-O-Si groups. GIXRD analysis confirmedthat the glass coatings had an amorphous structure. The SEM micrographs of the glass coatingsshowed the films to consist of droplets with diameters ranging from 0.2 to 5 μm. SEM was used todetermine the rate of apatite formation on the coating when exposed to simulated body fluid (SBF)solution for 7 days. We demonstrated that pulsed laser deposition leads to good glass-metaladhesion on the substrate and well attached bioactive particles on the surface. We consider thereforethis method appropriate for forming implants that can develop an apatite layer after immersion inSBF
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.277.pdf
