Effect of feedstock and plasma gun on the microstructure and bioactivity of plasma sprayed bioactive glass coatings

Plasma-sprayed 45S5 bioactive glass coatings were manufactured using two types of powder feedstocks (commercial and lab-made glass) plasma torches (single triple cathode) to analyse their influence on the microstructure bioactivity coatings. Besides, volatilisation oxides such as Na2O P2O5 during deposition was studied. All microstructurally characterised by scanning electron microscopy, X-ray diffraction dispersive energy analysis. Moreover, sprayed studied immersing in Simulated Body Fluid until 14 days. The obtained cathode torch showed similar thickness, less total porosity greater microstructural homogeneity than coating deposited with single torch. analysis revealed lower amounts sodium phosphorus at surrounding lamellae, due its formation these elements varied depending type feedstock jet enthalpy. Concerning coatings, all them have developed a hydroxycarbonate apatite layer surface.