Abstract
CrN coating possesses high strength, hardness and good resistance to friction. In order to further improve the performance of CrN coating, especially the high temperature resistance, a series of Cr1-xAlxN coatings with different Al content were deposited on the surface of 316 stainless steel by closed field unbalanced magnetron sputtering (CFUBMS). The microstructure, mechanical properties of Cr1-xAlxN coatings were investigated by XRD, FESEM/EDS and microhardness tester, respectively. The oxidation behaviors of Cr1-xAlxN coatings at 800°C were also studied. The results showed that with the increase of Al content, the hardness of the coating increases first and then decreases, and the binding force decreases gradually, and its microstructure is gradually refined. The phases in CrAlN coatings are mainly CrN and AlN. As the amount of Al increases, the number of dense oxide films on the surface of the coating increases, increasing the antioxidant capacity of the coating.
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