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Metals 2016, 6(11), 265; doi:10.3390/met6110265

Sputtering Power Effects on Growth and Mechanical Properties of Cr2AlC MAX Phase Coatings

1
Chair of Physical Metallurgy and Materials Technology, Brandenburg Technical University, Cottbus 03046, Germany
2
Department of Material Science, Welding and Strength of Material, Wroclaw University of Science and Technology, Wrocław 50370, Poland
3
University of South Florida, Tampa, FL 33620, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Jonathan Cormier
Received: 13 September 2016 / Revised: 21 October 2016 / Accepted: 25 October 2016 / Published: 5 November 2016
(This article belongs to the Special Issue Ni- and Co-Based Superalloys and Their Coatings)
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Abstract

Coating growth and mechanical properties of nanolamellar Cr2AlC coatings at various sputtering power were investigated in the present study. Cr2AlC coating was deposited on the IN 718 superalloy and (100) Si wafers by DC magnetron sputtering at different sputtering powers. The structure and properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nanoindentation. It was found that coatings had columnar structure with nanocrystalline substructure. Deposition rate increased with the sputtering power. XRD results showed the presence of the Cr2AlC MAX phase, intermetallic AlCr2 and Cr7C3 carbide phases, along with the change in preferential coating growth orientation. TEM observations confirmed the occurrence of these phases, and the SAED patterns demonstrated significant texture of the coatings. Hardness values were measured in the range between 11–14 GPa, showing a slight increase with the sputtering power. View Full-Text
Keywords: Cr2AlC coatings; MAX phase; sputtering; XRD; TEM; Mechanical properties; Ni-based superalloy; sputtering power Cr2AlC coatings; MAX phase; sputtering; XRD; TEM; Mechanical properties; Ni-based superalloy; sputtering power
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Naveed, M.; Obrosov, A.; Zak, A.; Dudzinski, W.; Volinsky, A.A.; Weiß, S. Sputtering Power Effects on Growth and Mechanical Properties of Cr2AlC MAX Phase Coatings. Metals 2016, 6, 265.

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