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The Effect of Catho...
The Effect of Cathodic Arc Guiding Magnetic Field on the Growth of (Ti0.36Al0.64)N Coatings
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- Broering Chaar, Ana Beatriz, 1990- (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten,Department of Materials Science and Engineering, D3.3 Saarland University, Saarbrücken, Germany
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- Syed, Muhammad Bilal, 1977- (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten
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- Hsu, Tun-Wei, 1991- (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten
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- Johansson-Jöesaar, Mats, 1965- (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten,Seco Tools AB, SE-737 82 Fagersta, Sweden
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- Andersson, Jon M. (author)
- Seco Tools AB, SE-737 82 Fagersta, Sweden
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- Henrion, Gérard (author)
- Institute Jean Lamour, Campus ARTEM, University of Lorraine, CNRS, F-54011 Nancy, France
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- Johnson, Lars J. S. (author)
- Sandvik Coromant, SE-126 80 Stockholm, Sweden
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- Mücklich, Frank (author)
- Department of Materials Science and Engineering, D3.3 Saarland University, D-66123 Saarbrücken, Germany
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- Odén, Magnus, 1965- (author)
- Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten
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(creator_code:org_t)
- 2019-10-12
- 2019
- English.
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In: Coatings. - : MDPI. - 2079-6412. ; 9:10
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Abstract
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- We use a modified cathodic arc deposition technique, including an electromagnetic coil that introduces a magnetic field in the vicinity of the source, to study its influence on the growth of (Ti0.36Al0.64)N coatings. By increasing the strength of the magnetic field produced by the coil, the cathode arc spots are steered toward the edge of the cathode, and the electrons are guided to an annular anode surrounding the cathode. As a result, the plasma density between the cathode and substrate decreased, which was observed as a lateral spread of the plasma plume, and a reduction of the deposition rate. Optical emission spectroscopy shows reduced intensities of all recorded plasma species when the magnetic field is increased due to a lower number of collisions resulting in excitation. We note a charge-to-mass ratio decrease of 12% when the magnetic field is increased, which is likely caused by a reduced degree of gas phase ionization, mainly through a decrease in N2 ionization. (Ti0.36Al0.64)N coatings grown at different plasma densities show considerable variations in grain size and phase composition. Two growth modes were identified, resulting in coatings with (i) a fine-grained glassy cubic and wurtzite phase mixture when deposited with a weak magnetic field, and (ii) a coarse-grained columnar cubic phase with a strong magnetic field. The latter conditions result in lower energy flux to the coating’s growth front, which suppresses surface diffusion and favors the formation of c-(Ti,Al)N solid solutions over phase segregated c-TiN and w-AlN.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- physical vapor deposition
- magnetic field
- optical emission spectroscopy
- coatings
- grain size
Publication and Content Type
- ref (subject category)
- art (subject category)
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Broering Chaar, ...
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Syed, Muhammad B ...
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Hsu, Tun-Wei, 19 ...
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Johansson-Jöesaa ...
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Andersson, Jon M ...
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Henrion, Gérard
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Johnson, Lars J. ...
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Mücklich, Frank
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Odén, Magnus, 19 ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Coatings
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Linköping University