How does microstructuring of boron carbide coatings affect their trobological properties?
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Microstructuring of boron carbide coatings has been found to have a significant impact on their tribological properties. The introduction of SiC into the (MoNbTaTiV)C5-SiC multiphase ceramic coating resulted in improved densification and wear resistance, with specific wear rates ranging from 10^-7 to 10^-6 mm3/N·m . Similarly, the addition of Hf or Nb additives in the nanostructured smart coatings (NSC) based on the multilayered alternating carbonitride/nitride bilayer system enhanced the surface microhardness and reduced the specific wear rate to lower than 2 × 10^-6 mm3/Nm . Furthermore, the AlMgB14-based ceramic coatings exhibited a low coefficient of friction (COF) of 0.12 and wear resistance of 7.5 × 10^-5 mm3/N·m, reducing the COF of WC-based hard alloys by more than two times . These findings suggest that microstructuring techniques can improve the tribological properties of boron carbide coatings, enhancing their wear resistance and reducing friction.
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