Mechanical properties of superhard TiB2 coatings prepared by DC magnetron sputtering

Ultra sharp Berkovich indenter used for nanoindentation studies of TiB2 thin films

“…The increase of |V b | promotes the growth towards the (0 0 1) orientation. This tendency was mentioned also by other researchers [2,3,[6][7][8]. It is a well known fact that TiB 2 films with (0 0 1) orientation yield the highest hardness as compared with TiB 2 films with other orientations [6,19], although the interface orientation of the substrate TiB 2 layer may also affect the hardness level [20,21].…”

“…The last 20 years a number of researchers reported on the mechanical properties of TiB 2 [1,[3][4][5][6][7][8] films. Herr et al commented on the change of TiB 2 coating hardness as a function of the negative applied voltage (V b ) to the substrate.…”

“…Finally, Mikula et al developed 1.3 m thick TiB 2 coatings in a variety of substrates using unbalanced d.c. magnetron sputtering. They performed ∼250 nm depth indentations and reported hardness values between 35 and 75 GPa depending on the substrate temperature and V b [8].…”

Multifunctional Ceramic Nanostructured Coatings

“…The bending strength in a massive state of ≈1000 MPa was reached for this quasi-binary system at hardness of 28 GPa and density of 5,88·103 kg/m 3 . The bending strength and hardness of individual components does not exceed 400 MPa and 26…27 MPa [15], accordingly.…”

“…The research done during the last ten years showed that the high functional and primarily mechanical properties can be expected from optimization of a method of ion-plasmous formation of single-phase [1][2][3] and multi-phase coatings [4][5][6][7][8].…”