Residual stress analysis on the Ti-bioglass coatings produced by high velocity flame spraying

High velocity flame spraying and coating process technology was adopted to spray pure titanium powder with addition of glaze glass(G)on Ti6Al4V substrate.The coatings were crystallized at temperature 700℃.The residual macro-stress in the coatings was tested by grazing incidence X-ray diffraction(GIXRD).And the result shows that the coating present residual compressive stress(RCS).The stress is proportional to the content of the glaze glass.The larger particle size, which increased the kinetic energy of the flying particle, produces larger stress.The reason for presenting RCS is that high spray speed and large kinetic energy generated jet impingement which leads to the existence of the RCS.This is helpful to increase the bonding strength of the coatings.