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The paper focuses on the dual high-power impulse magnetron sputtering of TiAlN coatings using short pulses of high power delivered to the target. The surface morphology, elemental composition, phase composition, hardness, wear resistance, and adhesive strength of TiAlN coatings with different Al contents were investigated on WC-Co substrates. The heat resistance of the TiAlN coating was determined with synchrotron X-ray diffraction. The hardness of the TiAlN coating with a low Al content ranged from 17 to 30 GPa, and its wear rate varied between 1.8∙10 -6 and 4.9∙10 -6 mm 3 ·N -1 ·m -1 depending on the substrate bias voltage. The HF1-HF2 adhesion strength of the TiAlN coatings was evaluated with the Daimler-Benz Rockwell C test. The hardness and wear rate of the Ti 0.61 Al 0.39 N coating were 26.5 GPa and 5.2∙10 -6 mm 3 ·N -1 ·m -1 , respectively. The annealing process at 700 °C considerably worsened the mechanical properties of the Ti 0.94 Al 0.06 N coating, in contrast to the Ti 0.61 Al 0.39 N coating, which manifested a high oxidation resistance at annealing temperatures of 940-950 °C.

The paper deals with the (Cr 1-x Al x )N coating containing 17 to 54 % Al which is deposited on AISI 430 stainless steel stationary substrates by short-pulse high-power dual magnetron sputtering of Al and Cr targets. The Al/Cr ratio in the coating depends on the substrate position relative to magnetrons. It is shown that the higher Al content in the (Cr 1-x Al x )N coating improves its hardness from 17 to 28 GPa. Regardless of the Al content, the (Cr 1-x Al x )N coating manifests a low wear rate, namely (4.1-7.8) × 10 -9 and (3.9-5.3) × 10 -7 mm 3 N -1 m -1 in using metallic (100Cr6) and ceramic (Al 2 O 3 ) counter bodies, respectively. In addition, this coating possesses the friction coefficient 0.4-0.7 and adhesive strength quality HF1 and HF2 indicating good interfacial adhesion according to the Daimler-Benz Rockwell-C adhesion test.