000038424 001__ 38424
000038424 005__ 20240711092259.0
000038424 0248_ $$a4148
000038424 0247_ $$2ISSN$$a0944-2952
000038424 0247_ $$2Handle$$a2128/312
000038424 037__ $$aPreJuSER-38424
000038424 041__ $$aGerman
000038424 0881_ $$aJuel-4148
000038424 088__ $$2JUEL$$aJuel-4148
000038424 1001_ $$0P:(DE-Juel1)VDB5612$$aPintsuk, Gerald$$b0$$eCorresponding author$$uFZJ
000038424 245__ $$aEntwicklung eines neuen Design-Konzeptes für Divertorkomponenten-Integration eines funktionell gradierten W/Cu-Überganges
000038424 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2004
000038424 300__ $$agetr. Pag.
000038424 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis
000038424 3367_ $$0PUB:(DE-HGF)3$$2PUB:(DE-HGF)$$aBook
000038424 3367_ $$02$$2EndNote$$aThesis
000038424 3367_ $$2DRIVER$$adoctoralThesis
000038424 3367_ $$2BibTeX$$aPHDTHESIS
000038424 3367_ $$2DataCite$$aOutput Types/Dissertation
000038424 3367_ $$2ORCID$$aDISSERTATION
000038424 4900_ $$0PERI:(DE-600)2414853-2$$816385$$aBerichte des Forschungszentrums Jülich$$v4148$$x0944-2952
000038424 502__ $$aAachen, Techn. Hochsch., Diss., 2004$$bDr. (FH)$$cTechn. Hochsch. Aachen$$d2004
000038424 500__ $$aRecord converted from JUWEL: 18.07.2013
000038424 500__ $$aRecord converted from VDB: 12.11.2012
000038424 520__ $$aOne of the most difficult topics in the design and development of future fusion devices, e.g. ITER (Latin for “the way”) is the field of plasma facing components for the divertor. In steady-state mode these will be exposed to heat fluxes up to 20 MW/m$^{2}$. The favored design-option is a component made out of tungsten and copper-alloys. Since these materials differ in their thermal expansion coefficient and their elastic modulus a temperature gradient within the component, caused by thermal loads, results in stresses at the interface. An alternative design-option for divertor-components deals with the insertion of a functionally graded material (FGM) between tungsten and copper. This establishes a continuous change of material properties and therefore minimize the stresses and optimize the thermal behavior of the component. Low pressure plasma-spraying and direct laser-sintering are introduced as possible production-methods of graded W/Cu-composites. Based on preliminary investigations both are used for fabricating W/Cu-composite materials with different mixing ratios. Thermo-mechanical and thermo-physical material properties will be determined on these composites and extrapolated to all mixing ratios. For laser-sintering these are limited to Cu-contents of ~20 to 100 Vol%. Therefore the plasma-spraying process is favored. In finite-element-analyses the graded material and its material properties will be implemented into a 2-D simulation-model of a divertor component. The composition and the design of the graded W/Cu-composite will be optimized. Best results are obtained by high contents of tungsten within the graded layer, which are still improved by a macro-brush design with dimensions of 4.5 x 4.5 mm$^{2}$. This results in a transfer of critical stresses from the mechanical bonded interface between the plasma facing and the graded material to the diffusion bonded interface between the graded material and copper. The joining of tungsten, a plasma-sprayed graded W/Cu-interlayer, OFHC-Cu (Oxygen Free High Conductivity) and CuCrZr will be done by Hot Isostatic Pressing. Parameters are a temperature of 550°C an a pressure of 195 MPa. Electrochemical deposited copper and nickel are added. Copper is used as surface layer of the graded W/Cu-composite and nickel for the strengthening of the diffusion bonding. Ultra-sonic-testing revealed narrow areas with inhomogeneous bonding at the interface, mainly nearby the outer surface of the module. The module containing the macro-brush has been tested at the electron-beam test facility JUDITH. It survived power loads at steady state operation of 23.8 MW/m$^{2}$ and 150 cycles at 20 MW/m$^{2}$ during thermal fatigue experiments. These results verify, that the insertion of a graded W/Cu-interlayer increases the resistance against thermal loads. Especially in the combination with the castellated structure.
000038424 536__ $$0G:(DE-Juel1)FUEK250$$2G:(DE-HGF)$$aKernfusion und Plasmaforschung$$cE05$$x0
000038424 540__ $$aNeither this book nor any part of it may be reproduced or transmitted in any form or by any  means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage and retrieval  system, without permission in writing from the publisher.
000038424 655_7 $$aHochschulschrift$$xDissertation (FH)
000038424 8564_ $$uhttps://juser.fz-juelich.de/record/38424/files/Juel_4148_Pintsuk.pdf$$yOpenAccess
000038424 909CO $$ooai:juser.fz-juelich.de:38424$$pdnbdelivery$$pVDB$$pdriver$$popen_access$$popenaire
000038424 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000038424 9141_ $$y2004
000038424 9131_ $$0G:(DE-Juel1)FUEK250$$bEnergie$$kE05$$lKernfusion und Plasmaforschung$$vKernfusion und Plasmaforschung$$x0
000038424 9201_ $$0I:(DE-Juel1)VDB2$$d31.12.2006$$gIWV$$kIWV-2$$lWerkstoffstruktur und Eigenschaften$$x0
000038424 970__ $$aVDB:(DE-Juel1)49189
000038424 9801_ $$aFullTexts
000038424 980__ $$aVDB
000038424 980__ $$aConvertedRecord
000038424 980__ $$aphd
000038424 980__ $$aI:(DE-Juel1)IEK-2-20101013
000038424 980__ $$aUNRESTRICTED
000038424 980__ $$aJUWEL
000038424 980__ $$aFullTexts
000038424 981__ $$aI:(DE-Juel1)IMD-1-20101013
000038424 981__ $$aI:(DE-Juel1)IEK-2-20101013