000136189 001__ 136189
000136189 005__ 20240711092309.0
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000136189 0247_ $$2ISBN$$a978-3-89336-582-1
000136189 0247_ $$2ISSN$$a1866-1793
000136189 0247_ $$2Handle$$a2128/3708
000136189 020__ $$a978-3-89336-582-1
000136189 037__ $$aPreJuSER-136189
000136189 041__ $$aGerman
000136189 082__ $$a500
000136189 082__ $$a333.7
000136189 082__ $$a620
000136189 084_0 $$aTHS - Turbines, pumps
000136189 084_0 $$aFMTG - High temperature alloys
000136189 084_1 $$2LS$$aTHS - Turbinen, Pumpen
000136189 084_1 $$aFZJ - Schriftenreihen des Forschungszentrums Jülich
000136189 1001_ $$0P:(DE-Juel1)VDB64249$$aSubanovic, Marko$$b0$$eCorresponding author$$gmale$$ufzj
000136189 245__ $$aEinfluss der Bondcoatzusammensetzung und Herstellungsparameter auf die Lebensdauer von Wärmedämmschichten bei zyklischer Temperaturbelastung
000136189 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2009
000136189 300__ $$a188, VI S.
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000136189 4900_ $$0PERI:(DE-600)2445288-9$$aSchriften des Forschungszentrums Jülich. Reihe Energie und Umwelt / Energy und Environment$$v42
000136189 502__ $$aRWTH Aachen, Diss., 2008$$bDr.$$cRWTH Aachen$$d2008
000136189 500__ $$aRecord converted from JUWEL: 18.07.2013
000136189 520__ $$aIn the present study the influence of the bond coat composition on the lifetime of thermal barrier coatings during thermal cycling was investigated. The knowledge, that the reactive elements (RE), which are essential for the improvement of the oxide scale adhesion, are “lost”, during the bond coat processing, made it necessary to investigate systematically the influence of the different manufacturing stages on the RE distribution. After VPS (vacuum plasma spraying) with a high oxygen partial pressure in the spraying chamber, the reactive elements in the NiCoCrAl-coating were tied up in oxide precipitates, and thus their beneficial effect on the scale adhesion was inhibited. Another important observation is that the RE’s are depleted during the bondcoat vacuum heat-treatment. The degree of Y-depletion depends not only on the Y-reservoir in the coating (Y-content and thickness) but also on the heat-treatment parameters, such as vacuum quality and temperature. A thin, dense alumina oxide scale with a smooth interface between bond coat and TGO doesn’t necessary lead to a lifetime extension of the EB-PVD TBC’s. TBC’s with such oxide morphology typically failed due to crack formation and propagation along the interface between the TGO and the bondcoat. By addition of zirconium it was possible to shift the failure initiation from the interface TGO/bondcoat to the interface TBC/TGO, which can apparently accommodate more thermal strain energy before failure. The shift of the failure location was achieved by a change of the oxide morphology, which mainly relies on adjusting a non-even wavy interface between the TGO and the bond coat and formation of defected oxide layers. In contrast, a defected oxide scale with a high growth rate shortened the life time of APSTBC’s. Porosity and spinel formation weakened the mechanical integrity of the oxide scale, and facilitated the crack formation and propagation of the already existing cracks. The potential to improve lifetimes of APS-TBC’s should arise from an adjustment of optimal interface roughness between TBC and bond coat, a TBC morphology with defect perpendicular to the crack propagation direction, formation of oxide scales with a low defect density and growth rate, “strong” interface between bond coat and oxide. [...]
000136189 536__ $$0G:(DE-Juel1)FUEK402$$2G:(DE-HGF)$$aRationelle Energieumwandlung$$cP12$$x0
000136189 650_7 $$aBoncoat
000136189 650_7 $$aWärmedämmschichten
000136189 650_7 $$ametallische Haftvermittlerschichten
000136189 650_4 $$aturbine blade
000136189 650_4 $$abonding
000136189 650_4 $$aheat
000136189 650_4 $$acorrosion inhibition
000136189 650_4 $$athermal barrier coating
000136189 650_4 $$ainsulation
000136189 8564_ $$uhttps://juser.fz-juelich.de/record/136189/files/Energie%26Umwelt_42.pdf$$yOpenAccess
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000136189 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000136189 9141_ $$y2013
000136189 9131_ $$0G:(DE-Juel1)FUEK402$$bEnergie$$kP12$$lRationelle Energieumwandlung$$vRationelle Energieumwandlung$$x0
000136189 9201_ $$0I:(DE-Juel1)VDB810$$kIEF-2$$lWerkstoffstruktur und Eigenschaften$$x0
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