Tempering behaviour of TiB2 coatings

摘要: AbstractThe compound TiB2 has been proposed as a wear resistant coating for tools because of its high hardness, but practical applications it is also necessary to know thermal and oxidation behaviour. For this reason in the present investigation coatings were magnetron sputtered on two different steel substrates annealed vacuum or air up 800°C. After deposition nanocrystalline with crystallite size ranging from 15 30 nm. The deposited at low bias voltage showed strong [001] fibre texture. With increasing grain decreased texture was lost. These structural modifications influenced layer which about 25 GPa - 200 V bias, even though these lower hardness layers had higher residual compressive stresses. started 600°C. At temperature formation TiOx detectable. Moreover, strength overcome characteristic crack patter...