Brillouin light scattering has been used to investigate the elasticity
properties of polycrystalline smooth fine-grained diamond films having various
diamond qualities. They have been deposited on titanium alloy Ti-6Al-4V by a
two-step microwave plasma-assisted chemical vapour deposition process
at 600°C. Taking advantage from the detection of a number of different
acoustic modes, a complete elasticity characterization of the films
has been achieved.