Influence of the nano hydroxyapatite powder on thermally sprayed HA coatings onto stainless steel

Effect of Doubled Sandblasting Process and Basic Simulated Body Fluid Treatment on Fabrication of Bioactive Stainless Steels

“…As a result, such HA films are not stable in living body for a long period [11]. Instead of the above method, SUS316L-HA composite prepared by hot-pressing technique [12], CO 2 laser beam welding method [13], hopeite coating [14] and HA coating by thermally spray method [15] and so forth have been already reported as bioactivity treatment for SUS316L. However, bioactivity treatment to impart high HA-forming ability induced on the whole surface of the materials within 7 days in physiological SBF to SUS316L specimen has not been established yet.…”

Biomimetic nanostructured hydroxyapatite coatings on metallic implant materials

“…According to Lima et al, HA coating made by HVOF spraying of nanostructured powder exhibited high crystallinity levels (~84%) and low degradation. 49,50 In a similar study conducted by Kulpetchdara et al 20 , synthesised nanostructured HA powder was successfully deposited on 316 stainless steel substrates by HVOF spray technique. They found out that the particle size of powder has influenced the microstructure and the mechanical properties of coatings.…”

“…20,[44][45][46][47][48] In brief, the commercially pure or synthesised powders are melted at high temperature and impelled towards the material surface to form a coating. 45 The parameters such as spraying conditions, feed stock and powder size also effect the coating properties.…”

“…Scanning electron micrographs representing morphology of hydroxyapatite powder, HVOF spray coating of powder on 316L stainless steel and deposited bioactive coating after 14 days of immersion in SBF derived from a, c, e commercial and b, d, f synthesised feed stocks20 …”

Biomedical materials and techniques to improve the tribological, mechanical and biomedical properties of orthopedic implants – A review article

“…The nanostructured HA exhibits higher hardness (VHN 2.15 GPa compared to VHN 1.06 GPa for commercial HA), higher degree of crystallinity, and excellent osseoconductive which can replace the conventional HA in prosthetic applications [103]. The results showed that certain decomposition of HA took place, as well as micro-cracks on the surface, and porosities, Figure 46 shows the induced micro-cracks and porosities in HA coating on SS and Ti.…”