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Ti2AlC coatings deposited by High Velocity Oxy-Fuel spraying

J. Frodelius ; Marie Sonestedt (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; S. Bjorklund ; J. P. Palmquist ; Krystyna Stiller (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; H. Hogberg ; L. Hultman
Surface & Coatings Technology (0257-8972). Vol. 202 (2008), 24, p. 5976-5981.
[Artikel, refereegranskad vetenskaplig]

High Velocity Oxy-Fuel has been utilized to spray coatings from Ti2AlC (MAXTHAL 211 (R)) powders. X-ray diffraction showed that the coatings consist predominantly of Ti2AlC with inclusions of the phases Ti3AlC2, TiC, and Al-Ti alloys. The fraction of Ti2AlC in coatings sprayed with a powder size of 38 mu m was found to increase with decreasing power of the spraying flame as controlled by the total gas flow of H-2 and O-2. A more coarse powder (56 mu m) is less sensitive to the total gas flow and retains higher volume fraction of MAX-phase in the coatings, however, at the expense of increasing porosity. X-ray pole figure measurements showed a preferred crystal orientation in the coatings with the Ti2AlC (0001) planes aligned to the substrate surface. Bending tests show a good adhesion to stainless steel substrates and indentation yields a hardness of 3-5 GPa for the coatings sprayed with a powder size of 38 mu m. (c) 2008 Elsevier B.V. All rights reserved.

Nyckelord: MAX-phase, High Velocity Oxy-Fuel (HVOF), Phase transitions, X-ray, diffraction, Scanning electron microscopy (SEM), THIN-FILMS, STABILITY, OXIDATION, TI3ALC2, TI3SIC2

Denna post skapades 2009-10-26. Senast ändrad 2016-07-21.
CPL Pubid: 100788


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Mikroskopi och mikroanalys (2005-2012)


Teknisk fysik

Chalmers infrastruktur

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Microstructure and properties of coatings produced by spray deposition of Ti2AlC powders