SiO₂‐CaO Vitreous Films Deposited onto Ti6Al4V Substrates

Abstract

A sol-gel dipping method has been utilised to deposit SiO 2 -CaO films onto Ti6Al4V alloy substrates. These layers were prepared by the dip-coating technique from a series of precursor solutions with different concentrations of glassy xSiO 2 -(1 − x)CaO (x = 0.8 mol) diluted with absolute ethanol. The characterisation of the films by a variety of techniques reveals differences in the textural properties and in the films'

Bioactive CaO−SiO2−PDMS Coatings on Ti6Al4V Substrates

“…Coatings were deposited by dipping polished disk substrates of Ti6Al4V (13 mm in diameter, 1 mm thick) into the sol at a constant withdrawal rate of 2500 μm/s, which was selected from our previous studies . The produced coatings were kept at room temperature for 24 h for gelation and aged at 60 °C for 48 h. Finally, drying was done at 150 °C for 24 h (Figure ).…”

Substituted hydroxyapatite coatings of bone implants

“…Procedures such as dip-coating have proven to be very useful for the control of the thickness, morphology and homogeneity of the coatings. 71,72 Dip-coating consists in the immersion of the substrate into a solution containing the coating precursors. In the case of HAp or substituted HAp coatings, the precursors are soluble salts of the cations (such as Ca(NO 3 ) 2 Á4H 2 O) and alkoxides of the anions, for instance triethyl phosphite P(OCH 2 CH 3 ) 3 (TIP) and tetraethyl orthosilicate Si(OCH 2 CH 3 ) 4 (TEOS) solutions in the case of silicon substituted hydroxyapatites (Si-HAp).…”

“…239 The surface functionalization of these metal structures with a highly bioactive bioceramic has emerged as a very interesting alternative. 240,241 The preparation of Si-HAp coatings by low temperature methods and their in vivo evaluation have been carried out by several research groups. 242,243 For this aim Ti or Ti alloy macroporous scaffolds have been often chosen as substrates.…”

Bioceramic Coatings for Medical Implants

“…Other deposition techniques, similar to those described before for calcium phosphate coatings, have been studied and used for the deposition of BG coatings, including plasma spraying [96,97], RF magnetron sputtering [98,99] PLD [100,101], laser cladding [102], sol-gel [103,104], or EPD [105,106]. As already mentioned in the CaP coatings, the different techniques have also shown advantages and disadvantages for BGs deposition (see for instance references [93,106]) and it is not easy to evaluate them in a comparative way.…”