TY - JOUR
T1 - Synthesis and characterization of Cr-B-N coatings deposited by reactive arc evaporation
AU - Polychronopoulou, Kyria
AU - Neidhardt, J.
AU - Rebholz, C.
AU - Baker, M. A.
AU - O'Sullivan, M.
AU - Reiter, A. E.
AU - Gunnaes, A. E.
AU - Giannakopoulos, K.
AU - Mitterer, C.
PY - 2008/11
Y1 - 2008/11
N2 - Nanocomposite Cr-B-N coatings were deposited from CrB0.2 compound targets by reactive arc evaporation using an Ar/N2 discharge at 500 °C and -20 V substrate bias. Elastic recoil detection (ERDA), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and selected-area electron diffraction (SAED) were used to study the effect of the N2 partial pressure on composition and microstructure of the coatings. Cross-sectional scanning electron microscopy (SEM) showed that the coating morphology changes from a glassy to a columnar structure with increasing N, partial pressure, which coincides with the transition from an amorphous to a crystalline growth mode. The saturation of N content in the coating confirms the formation of a thermodynamically stable CrN-BN dual-phase structure at higher N2 fractions, exhibiting a maximum in hardness of approximately 29 GPa.
AB - Nanocomposite Cr-B-N coatings were deposited from CrB0.2 compound targets by reactive arc evaporation using an Ar/N2 discharge at 500 °C and -20 V substrate bias. Elastic recoil detection (ERDA), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and selected-area electron diffraction (SAED) were used to study the effect of the N2 partial pressure on composition and microstructure of the coatings. Cross-sectional scanning electron microscopy (SEM) showed that the coating morphology changes from a glassy to a columnar structure with increasing N, partial pressure, which coincides with the transition from an amorphous to a crystalline growth mode. The saturation of N content in the coating confirms the formation of a thermodynamically stable CrN-BN dual-phase structure at higher N2 fractions, exhibiting a maximum in hardness of approximately 29 GPa.
UR - http://www.scopus.com/inward/record.url?scp=56549088656&partnerID=8YFLogxK
U2 - 10.1557/JMR.2008.0370
DO - 10.1557/JMR.2008.0370
M3 - Article
AN - SCOPUS:56549088656
SN - 0884-2914
VL - 23
SP - 3048
EP - 3055
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 11
ER -