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Deposition and characterization of magnetron sputtered amorphous Cr-C films
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- Andersson, Matilda (author)
- Uppsala universitet,Oorganisk kemi
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- Högström, Jonas (author)
- Uppsala universitet,Oorganisk kemi
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- Urbonaite, Sigita (author)
- Uppsala universitet,Strukturkemi
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- (creator_code:org_t)
- Elsevier BV, 2012
- 2012
- English.
- In: Vacuum. - : Elsevier BV. - 0042-207X .- 1879-2715. ; 86:9, s. 1408-1416
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Thin films in the Cr-C system with carbon content of 25-85 at.% have been deposited using non-reactive DC magnetron sputtering from elemental targets. Analyses with X-ray diffraction and transmission electron microscopy confirm that the films are completely amorphous. Also, annealing experiment show that the films had not crystallized at 500 degrees C. Furthermore, X-ray spectroscopy and Raman spectroscopy show that the films consist of two phases, an amorphous CrCx phase and an amorphous carbon (a-C) phase. The presence of two amorphous phases is also supported by the electrochemical analysis, which shows that oxidation of both chromium and carbon contributes to the total current in the passive region. The relative amounts of these amorphous phases influence the film properties. Typically, lower carbon content with less a-C phase leads to harder films with higher Young's modulus and lower resistivity. The results also show that both films have lower currents in the passive region compared to the uncoated 316L steel substrate. Finally, our results were compared with literature data from both reactively and non-reactively sputtered chromium carbide films. The comparison reveals that non-reactive sputtering tend to favour the formation of amorphous films and also influence e.g. the sp(2)/sp(3) ratio of the a-C phase.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- Amorphous
- Chromium carbide
- Magnetron sputtering
- Electrochemical
- Nanoindentation
- Inorganic chemistry
- Oorganisk kemi
- Kemi med inriktning mot oorganisk kemi
- Chemistry with specialization in Inorganic Chemistry
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- ref (subject category)
- art (subject category)
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