Ion beam induced atomic mixing at the Ti-C interface and its implications for mechanical properties

Thin films of carbon were deposited onto titanium substrates using laser induced physical vapour deposition (LPVD) from a high purity pyrolitic graphite target. The films were irradiated with 100 keV Ar+ ions to promote beam mixing at the Ti-C interface. Low angle X-ray diffraction studies revealed the formation of titanium carbide. The effects of titanium carbide formation on the mechanical properties of the sample were studied. The microhardness of the sample was measured using Knoop's indentation technique. The wear characteristics were measured by a pin-on-disc wear testing machine. The surface morphology of the sample was studied using scanning electron microscopy. (orig.)