Abstract
Super-hard and corrosion-resistant (AlCrMoSiTi)Nx high-entropy nitride coatings were prepared using a novel multi-arc cathodic vacuum magnetic filtration deposition at different N2 gas flow rates (RN) of 0, 20, 50 and 70 sccm. The influence of RN on the element composition, phase structure, mechanical, tribological and corrosion properties of the coatings were systematically studied. Higher RN promoted higher N contents in the coatings that resulted in a transformation from an amorphous to face-centered-cubic (FCC) phase. At a high N content of 49 at. % (RN = 70%), the coating exhibits a simple FCC structure, and offers a superior combination of super-hardness, excellent wear and corrosion resistance. The exceptional hardness of the (AlCrMoSiTi)N coating (41.6 GPa) that surpasses most high-entropy ceramics is underlain by the formation of strong metal-nitride phase, the solid-solution strengthening and the fine grain strengthening. Therefore, (AlCrMoSiTi)Nx nitride coating presents a potential application in protective coating owing to its extraordinary mechanical properties and corrosion resistance.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
