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Abstract
In this work, four AlCrBON coatings with various oxygen contents were fabricated. As the oxygen content increased, a phase transition from fcc-(Cr, Al)N to fcc-(Cr, Al)(O, N) occurred, the Al-O and Cr-O bonds increased while Al-N and Cr-N bonds reduced. The AlCrBON coating with a 13.4-atom% oxygen content (C2 coating) exhibited a high nano-hardness (39.6 GPa) and scratch adhesion (with Lc2 of more than 70 N), low high-frequency impact force (0.7 N), less delamination, and more cutting times (10 min under 80 m/min and 240 s under 100 m/min) against titanium alloy under both cutting speeds. Addition of O relieved the wear both on the flank face and rake face of the coated inserts against titanium alloy throughout the cutting process.
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