Calcium hydroxyapatite has been sputtered on glass and Ti-6Al-4V substrates using a 1.5-kV argon ion beam. The films have been examined by x-ray diffraction analysis, energy dispersive spectroscopy, scanning electron microscopy, and adhesion testing. Results of this experimentation are presented.
The pulsed Gas Process (PGP) has been used to produce Al/AlxOy The pulsed Gas Process (PGP) has been used to produce Al/AlxOy layered coatings on a cylindrical surface. Previous work1 has shown that the yield strength and surface morphology of aluminum films deposited at normal incidence is quite sensitive to the spacing of the oxygen gas pulse. The mechanical testing data follow a Hall–Petch equation for the yield strength. This gives an ideal range of conditions for test on curved surfaces. Free standing aluminum foils on the order of 20–35 μm thick have been deposited using PGP variations on a rotating cylindrical substrate with varying angles of deposit. The results show porosity in the unpulsed material, and fully dense material in highly pulsed material deposited at ±60° or less settings. The fully dense material shows ductility and the yield strength is reduced by a factor of 0.84 over the predicted flat plate strength.
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