58S and 68S sol-gel glass-like bioactive coatings for enhancing the implant performance of AZ91D magnesium alloy
By Omar, S. A.; Ballarre, J.; Castro, Y.; Campos, E. Martinez; Schreiner, W.; Dur
Published in Surface and Coatings Technology
Surface and Coatings Technology
2020
Abstract
Magnesium alloys such as AZ91D, has been presented as potential material for temporary implant material since it has a mechanical performance suitable with bone tissue and also degrades in time. The fast degradation at early times of AZ91D alloy could be retarded applying bioactive sol-gel glass coatings. In this work, two compositions of known bioactive silica-glasses (58S and 68S) were synthetized by sol-gel method and deposited by dip coating to the magnesium substrates. The glasses were produced without using any nitrate precursor, avoiding the presence of remaining residual in the coatings that could be not beneficial to the body. The coatings presented an excellent bioactive response after immersion in Hanks' balanced salt solution (HBSS) at 37