TY - GEN A1 - Skopp, André A1 - Woydt, Mathias T1 - Expertise on ceramic type coatings: Compilation of the macroscopic, microscopic and micro analytical results of samples coated with present solution of 8Y2O3oZrO2 rub tested against SiC tipped IN 718 blade - Work package 4 N2 - Gas turbine efficiency is significantly influenced by the pressure losses caused by the inevitable gap between the rotating turbine blades and the stator parts. Because contact between rotor and stator cannot be completely avoided with a small gap, systems are designed to allow for some rubbing. Honeycombs or abradable MCrAlY stator coatings are normally used to minimize the wear of the rotor blades when rubbing occurs. But, more efficient solutions must be developed on modern engines, because both suffer temperature limitation and standard MCrAlY have usually poor abradability. For higher temperature and closer control of the gap, a thick thermal-barrier coating must be applied on the stator, but presently with no rub-tolerance. To increase the abradability of the stator coating, its composition and structure can be modified, but such changes must be strictly limited with respect to the loss of erosion resistance. The solution can then lie in the hardening of the rotating blade tip to permit the use of harder ceramic or metallic coatings on the stator with greater resistance to erosion. These systems typically consist, on the blade tip, of hard particles embedded in a softer metallic matrix. In the present programme, it is therefore intended: - to assess the present European solutions, standard or in development, for outer air seals and blade tips. - to develop coated grits or new grits for the hardening of the blade tips, as well as to improve the matrix and the stator coating for long life systems. - to optimize the most promising of these systems, that will be tested on development rigs and on engine. The consortium includes several engine manufacturers, which are the potential users of the innovating solutions to be developed, companies having a large experience in the field of abradables and tip coatings and non industrial partners involved in tribology and materials science. T2 - Project 2. Advanced Abradables and Tip Coatings for Gas Turbines (BRITE-EURAM BRPR960187) CY - Berlin, Germany DA - 1998-01-01 PY - 1998 SN - 92-828-3230-9 SN - 1018-5593 IS - 17766 SP - 1(?) EP - 244(?) PB - Off. for Off. Publ. of the Europ. Communities CY - Luxembourg AN - OPUS4-2426 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kloß, Heinz A1 - Skopp, André A1 - Woydt, Mathias ED - Bartz, Wilfried J. T1 - Wear prediction in ultra-high speed and high temperature applications PY - 2000 SN - 3-924813-44-2 VL - 3 SP - 1639 EP - 1646 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-2427 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André A1 - Dörfel, Ilona A1 - Witke, Klaus T1 - Wear Engineering Oxides / Antiwear Oxides KW - Oxid KW - Hochtemperatur KW - Keramik KW - Reibung PY - 1999 SN - 1040-2004 SN - 1547-397X IS - 42,1 SP - 21 EP - 31 PB - Taylor & Francis CY - Philadelphia, Pa. AN - OPUS4-711 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Witke, Klaus A1 - Österle, Werner A1 - Skopp, André A1 - Woydt, Mathias T1 - Raman microprobe spectroscopy and transmission electron microscopy of thermal sprayed ZrO2 coatings before and after rub testing of outer air seals N2 - 8 wt% Y2O3-ZrO2 spray powder and thermally sprayed as thermal barrier coatings on outer air seals were characterized by Raman microprobe spectroscopy (RMS) and transmission electron microscopy to investigate the lateral distribution, composition, structure and grain size of ZrO2 phases and to separate ZrO2 and Y2O3. RMS of transfer layers on ZrO2-coated shrouds after rub tests against SiC laser-tipped metallic blades showed the formation of metallic oxides MeIMeII2O4 of spinel type. Wear tracks were partly covered by graphite and spinel-type oxides. In some cases, the latter were better detectable after laser enhanced cleaning by burning off the covering carbon layer. PY - 2001 U6 - https://doi.org/10.1002/jrs.791 SN - 0377-0486 SN - 1097-4555 VL - 32 IS - 12 SP - 1008 EP - 1014 PB - Wiley CY - Chichester AN - OPUS4-1230 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Woydt, Mathias A1 - Skopp, André A1 - Habig, Karl-Heinz T1 - Einfluß von Temperatur und Gleitgeschwindigkeit auf Festkörpergleitreibung und -verschleiß von Si3N4 bis 1000°C PY - 1989 SN - 0173-9913 SN - 0196-6219 VL - 66 IS - 10 SP - 426 EP - 432 PB - Göller CY - Baden-Baden AN - OPUS4-2402 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - Tribological behavior of silicon nitride materials under unlubricated sliding between 22°C and 1000°C KW - Silicon nitride KW - Wear maps KW - High temperature KW - Tribology KW - T-maps KW - Ceramics composites PY - 1995 SN - 0043-1648 VL - 181-183 SP - 571 EP - 580 PB - Elsevier CY - Amsterdam AN - OPUS4-2417 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias T1 - Ceramic and ceramic composite materials with improved friction and wear properties PY - 1995 SN - 1040-2004 SN - 1547-397X VL - 38 IS - 2 SP - 233 EP - 242 PB - Taylor & Francis CY - Philadelphia, Pa. AN - OPUS4-2418 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Witke, Klaus A1 - Skopp, André A1 - Woydt, Mathias ED - Michel, B. T1 - Raman spectroscopic investigations in tribologically stressed contacts of (Ti,Mo)(C,N) ceramics T2 - 2nd International Conference and Exhibition Micro Materials CY - Berlin, Germany DA - 1997-04-16 PY - 1997 SN - 3-932434-05-6 VL - 1 SP - 1094 EP - 1096 PB - ddp Goldenbogen CY - Dresden AN - OPUS4-2421 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Woydt, Mathias A1 - Skopp, André ED - Zambelli, G. ED - Vincent, L. T1 - Céramiques et Composites à Matrice Céramique PY - 1998 SN - 2-88074-338-9 N1 - Sprachen: Englisch/Französisch - Languages: English/French SP - 187 EP - 196 PB - Presses polytechniques et universitaires romandes CY - Lausanne AN - OPUS4-2422 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Woydt, Mathias A1 - Habig, Karl-Heinz T1 - Unlubricated sliding friction and wear of various Si3N4 pairs between 22°C and 1000°C PY - 1990 SN - 0301-679X VL - 23 IS - 3 SP - 189 EP - 199 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-2403 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -