Properties of Detonation Nanostructured Titanium-Based Coatings

Titanium-based coatings were deposited on aluminum samples using cumulative-detonation equipment. The gas mixture consumption (propane-oxygen-air) was up to 5 m3 per 1 kg of powder. The titanium-based coatings were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM) with diffraction, x-ray phase analysis, hardness measurements, and plasticity adhesion/cohesion resistance scratch tests. It was shown that the detonation titanium-based coatings are characterized by the presence of nanodispersed ceramic compounds and exhibit high values of plasticity, hardness, and adhesion strength. The titanium-based coatings had an amorphous structure, high hardness of up to 16 GPa, and a tensile bonding strength ranging from 52.5 to 53.0 MPa. A failure mode occurring in the tested samples was cohesive within the inter and intralamellar structure of coating.