TY - GEN A1 - Zhang, Ping A1 - Flores Renteria, Arturo A1 - Wild, E. A1 - Reimers, W. A1 - Leyens, Christoph T1 - Oxidation-resistant Ti-90Al coatings with lotus effect surfacemorphology deposited on a gamma-TiAl alloy T2 - Scripta Materialia N2 - Ti-90Al (in at.%) coatings were deposited on Ti-45Al-8Nb alloy at two different temperatures, 300 and 540 °C. The coatingsputtered at 300 °C consisted of Al and TiAl3 with columnar grain structure. The morphology, chemical composition and microstructureof the coating sputtered at540 °Cwere strongly dependent on the substrate microstructure. The two coating variantsformed oxidation-resistant Al2O3 scales during oxidation. The special morphological features of the coatings make them interestingfor geometrically structuring the surfaces to provoke the lotus effect. KW - Ti-Al coating KW - Sputtering KW - gamma-TiAl alloy KW - Oxidation-resistant coating KW - Lotus effect Y1 - 2009 SN - 1359-6462 VL - 61 IS - 12 SP - 1156 EP - 1159 ER - TY - GEN A1 - Garkas, Wagdi A1 - Leyens, Christoph A1 - Flores Renteria, Arturo T1 - Synthesis and characterization of Ti2AlC and Ti2AlN MAX phase coatings manufactured in an industrial-size coater KW - MAX Phase KW - thin films KW - phase transformation KW - Ternary carbides Y1 - 2010 ER - TY - GEN A1 - Wang, Qimin A1 - Flores Renteria, Arturo A1 - Schroeter, Olaf A1 - Mykhaylonka, Ruslan A1 - Leyens, Christoph A1 - Garkas, Wagdi A1 - Baben, Moritz to T1 - Fabrication and oxidation behavior of Cr2AlC coating on Ti6242 alloy Y1 - 2010 ER - TY - GEN A1 - Wang, Qimin A1 - Garkas, Wagdi A1 - Flores Renteria, Arturo A1 - Leyens, Christoph T1 - Oxidation Behaviour of Ti2AlN Films Composed Mainly of Nanolaminated MAX Phase T2 - Journal of nanoscience and nanotechnology KW - Ti2AlN KW - Nanolaminated MAX phase KW - Thin Films KW - Oxidation Y1 - 2010 SN - 1533-4899 VL - 11 IS - 10 SP - 8959 EP - 8966 ER - TY - GEN A1 - Wang, Q. M. A1 - Garkas, Wagdi A1 - Flores Renteria, Arturo A1 - Leyens, Christoph A1 - Lee, H. W. A1 - Kim, K. H. T1 - Oxidation behaviour of Ti–Al–C films composed mainly of a Ti2AlC phase T2 - Corrosion Science Y1 - 2011 SN - 0010-938X VL - 53 IS - 9 SP - 2948 EP - 2955 ER - TY - GEN A1 - Naveed, Muhammad A1 - Flores Renteria, Arturo A1 - Nebel, Daniel A1 - Weiß, Sabine T1 - Study of high velocity solid particle erosion behaviour of Ti2AlC MAX phase coatings T2 - Wear N2 - This research work provides information about the influence of Ti2AlC MAX phase coatings on the erosion resistance of Ti624 2alloy.Flat specimens were coated witha20 µm Ti2AlC film using an industrial siz emagnetron sputtering coater and annealed at 800 °C for 1h in vacuum for the formation of the MAX phase.The erosion resistance of the specimens was tested using high velocity particles at room temperature.The results indicate that the erosion resistance of Ti6242 has been significantly enhanced by the employment of MAX-phase coatings. This demonstrates the capability of using MAX phase coatings as erosion protective medium for engine components exposed to similar damage conditions. Additionally,the results show that uncoated Ti6242 samples with duplex microstructure have a better durability against erosion attack compared to uncoated samples with globular microstructure. KW - Erosion, MAX Phase Y1 - 2015 U6 - https://doi.org/10.1016/j.wear.2015.09.014 SN - 0043-1648 VL - 2015 IS - 342-343 SP - 391 EP - 397 ER - TY - GEN A1 - Naveed, Muhammad A1 - Flores Renteria, Arturo A1 - Weiß, Sabine T1 - Role of alloying elements during thermocyclic oxidation of β/γ-TiAl alloys at high temperatures T2 - Journal of Alloys and Compounds N2 - Gamma titanium aluminides are promising alloys known for their good mechanical properties and low densities, but their low oxidation resistance at high temperatures limits their application. This work discusses the thermocyclic oxidation behavior of newly developed β/γ-TiAl alloys at temperatures between 600 °C and 900 °C. An influence of β-stabilizing alloying elements like Nb and V on the oxidation of these alloys has been investigated here. The selected alloys are tested in an in-house developed thermocyclic furnace. The oxidation study is supported by gravimetric measurements along with Scanning Electron Microscopy (SEM) and Electron Diffraction Spectroscopy (EDS) mapping of the oxide layers. Additionally, phase formation after oxidation has been determined using X-Ray Diffraction (XRD). Results show that the Nb containing alloys are more oxidation resistant as compared to V containing alloys. The formation of a mixture of Al2O3 and TiO2 layers was found for all the alloys. The oxide kinetics controlled oxide growth and formation of various phases at different testing temperatures. KW - Aluminum oxide KW - γ-TiAl KW - thermocyclic oxidation KW - β-stabilizing elements Y1 - 2016 U6 - https://doi.org/10.1016/j.jallcom.2016.08.259 SN - 0925-8388 VL - 691 SP - 489 EP - 497 ER -