Coating Deposition by Ion-plasma Sputtering of MAX Phase Ti2AlC Target

Authors A.S. Kuprin1 , T.A. Prikhna2, E.N. Reshetnyak1, M.A. Bortnitskaya1, I.V. Kolodiy1, V.A. Belous1, S.N. Dub2 , A.V. Ilchenko1, V.B. Sverdun2

1National Center “Kharkov Institute of Physics and Technology”, 1, Akademicheskaya St., 61108 , Ukraine

2V.N. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, 2, Avtozavods’ka St., 04074 Kiev, Ukraine

Issue Volume 12, Year 2020, Number 5
Dates Received 12 May 2020; revised manuscript received 15 October 2020; published online 25 October 2020
Citation A.S. Kuprin, T.A. Prikhna, E.N. Reshetnyak, et al., J. Nano- Electron. Phys. 12 No 5, 05011 (2020)
PACS Number(s) 52.80.Vp, 52.77.Bn, 62.20.Qp, 81
Keywords MAX phase, Sputtering (24) , Plasma (13) , Coatings (10) , Structure (105) , Hardness (12) .

The process of coating deposition by sputtering a target based on the MAX phase Ti2AlC using a gas plasma source has been studied. It has been shown that the MAX phase of Ti2AlC refers to hard-sputtering materials. With an increase in the sputtering energy of Ar+ ions from 400 to 1200 eV, the sputtering coefficient of the target based on the MAX phase increases from 0.2 to 0.7 atom/ion. The obtained values are 1.5 times lower than the sputtering coefficients of the target from titanium. Phase transformations occur on the target surface and are associated with the decay of the MAX phase and the selective sputtering of lighter elements due to the bombardment by Ar+ ions. It was found that the composition of the deposited coatings is significantly affected by the magnitude of the bias potential on the substrate. With increasing potential in the range from 50 to 200 V, the relative aluminum content in the coatings drops sharply, in favor of titanium from Ti:Al  3.5:1 to Ti:Al  48:1. Regardless of the composition, a solid solution (Ti, Al)C is formed in the coatings with a cubic crystal lattice of the NaCl type, a crystallite size of 10-15 nm and an axial type texture. The MAX phase Ti2AlC was not detected in the coatings. Received coatings have high hardness and Young's modulus, which increase with decreasing aluminum concentration in the ranges of 21-30 GPa and 290-340 GPa.

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