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Synthesis and characterization of Cr-B-N coatings deposited by reactive arc evaporation

Polychronopoulou, K, Neidhardt, J, Rebholz, C, Baker, MA, O'Sullivan, M, Reiter, AE, Gunnaes, AE, Giannakopoulos, K and Mitterer, C (2008) Synthesis and characterization of Cr-B-N coatings deposited by reactive arc evaporation JOURNAL OF MATERIALS RESEARCH, 23 (11). 3048 - 3055. ISSN 0884-2914

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Abstract

Nanocomposite Cr-B-N coatings were deposited from CrB0.2 Compound reactive arc evaporation using an Ar/N-2 discharge at 500 degrees 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 N-2 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-2 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 N-2 fractions, exhibiting a maximum In hardness of approximately 29 GPa.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Technology, Materials Science, Multidisciplinary, Materials Science, MECHANICAL-PROPERTIES, THIN-FILMS, NANOCOMPOSITE COATINGS, TRIBOLOGICAL BEHAVIOR, ZR-B, PERFORMANCE, NITROGEN, NANOSTRUCTURE, HARDNESS
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Divisions: Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:06
Last Modified: 23 Sep 2013 18:26
URI: http://epubs.surrey.ac.uk/id/eprint/119

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