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

  • 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.

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Author: Muhammad Naveed, Aleksei ObrosovORCiD, Andrzej Zak, Wlodzimierz Dudzinski, Alex A. Volinsky, Sabine WeißORCiDGND
DOI:https://doi.org/10.3390/met6110265
ISSN:2075-4701
Title of the source (English):Metals
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2016
Tag:Cr2AlC; MAX Phase; TEM
Volume/Year:6
Issue number:11
First Page:265
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Metallkunde und Werkstofftechnik
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