Bioceramic dip-coating on Ti–6Al–4V and 316L SS implant materials

Abstract

The focus of the present study is based on more economical and rapid bioceramic coating on the most common implant substrates such as Ti-6Al-4V and 316L SS used often in orthopedics. For ceramic dip coating of implant substrates, Hydroxyapatite (HA) powder, Ca10(PO4)6(OH)2, P2O5, Na2CO3 and KH2PO4 are used to provide the gel. Ceramic films on sandblasted substrates have been deposited by using a newly manufactured dip-coating apparatus. Sample characterization is evaluated by SEM and XRD analysis. A smooth and homogeneous coating films have been obtained and average of 20 MPa bonding strength has been achieved for both Ti-6Al-4V and 316L SS alloys after sintering at 750 degrees C under flowing argon. The level of importance of the process parameters on coating was determined by using analysis of variance (ANOVA). The current process appears to be cheap, easy, and flexible to shape variations and high production rates for orthopedic applications.

The Effect of Coating Thickness on Corrosion Resistance of Hydroxyapatite Coated Ti6Al4V and 316L SS Implants

“…The effect of important parameters such as particle size, characterization, and crystallization of the coating powder were reported previously ( Ref 1,23,24,34,35). The as-sputtered coatings are usually non-stoichiometric and amorphous, which can cause some serious problems such as poor adhesion and excessive coating dissolution rates ( Ref 18,22,23).…”

Histological Assessment of Nano Hydroxyapatite, Chitosan and Collagen Composite Coating on Commercially Pure Dental Implants in Comparison with Nanohyroxyapatite Coating

“…Many investigations are being used in an effort to gain desired outcomes at the bone-implant interface (13) . Many studies have focused on surface properties and chemical composition as a way to control bone healing around dental implants (14) .The advantage of dip coating was ability of producing multiple thin coatings about 1000 nm thick with a high degree of uniformityif suitable additives are chosen as P2O5(P2O5 added to the suspension as a thickening material)and reduction in sintering temperature is also possible (15) .…”

Laser Shock Peening: Modeling, Simulations, and Applications

“…HA mineral is a naturally occurring form of calcium apatite with the formula Ca 10 (PO 4 ) 6 (OH) 2 and has close resemblance to the chemical and mineral components of teeth and bone. As a result of this similarity it stimulates bone cells to attack the implant surface and make proper bonding (Aksakal & Hanyaloglu, 2008), which allows for fractured segments to realign in correct anatomical position which is critical to recovery. Laser shock peening (LSP) is a promising surface treatment technique to improve the surface integrity by imparting compressive residual stresses that are beneficial for controlling corrosion of Mg-Ca implants.…”