Antusch, S.

Hanemann, T.

Piotter, V.

Rieth, M.

English

KITopen

KIT – University of the State of Baden-Wuerttemberg andNational Research Center of the Helmholtz Association*e-mail: steffen.antusch@kit.edu 2nd EnMat, Karlsruhe, Germany, May 12-16, 2013 P1.07-03 PL FUSIONMASS PRODUCTION OF COMPONENTS FOR FUTURE FUSION POWER PLANTS VIA ONE- AND TWO COMPONENT PIMSteffen Antusch*1, Thomas Hanemann1,2, Volker Piotter1, Michael Rieth11Karlsruhe Institute of Technology, Institute for Applied Materials, 76021 Karlsruhe, Germany2University of Freiburg, Department of Microsystems Engineering, 79110 Freiburg, GermanyMotivation: Powder Injection Molding (PIM) is a time and cost effective near-net-shape forming process with advantages concerningshape complexity, material utilization and high final density. This work will investigate the new fully automatic 2Component-PIM (2C-PIM)tool to replicate parts of the KIT divertor design concept of modular He-cooled finger units such as the tungsten tile and tungsten alloythimble in one step without brazing for the further DEMO power plant. 2C-PIM is a powerful process with high economic efficiency formass production, material development as well as for joining without additionally brazing of even complex shaped parts.The material connection: of the 2C-PIM combinations W + W-2La2O3 (Fig. 4, middle) and W + W-2Y2O3 (Fig. 4, right) aresuccessful. No cracks or gaps in the seam of the joining zonebetween the W tile and the W-alloy thimble are visible. Ascomparison, the resulting microstructure of the one-componenttungsten PIM mockup is shown in Fig. 4, left.The future fusion power reactor DEMO:The heat-treatment process: follows after debinding of thegreen parts. First pre-sintering (1800 °C, two hours, dry hydrogenatmosphere) to reach a state with only closed porosity. After thatthe samples were compacted by HIP-cycle (2000 °C, two hours,200 MPa, argon atmosphere).Fig. 1: Components of the HEMJ divertor.Fig. 3: Production of green parts with the new fully automatic 2C-PIM tool.Injection molding with the new fully automatic 2C-PIM tool:Step I: molding of the W-alloy thimble (W-2La2O3 respectivelyW-2Y2O3) and automatic moving of the tool around 180 °.Step II: molding of the W tile on top of the thimble (see Fig 3).Fig. 4: Analyses of the joining zone quality between tile and thimble.Acknowledgement: The authors are grateful to allcolleagues from KIT for their support and fruitful discussions.Fig. 2: The PIM process for W – developed @ KIT.The key steps in Powder Injection Molding for tungsten:Tasks for future: One main key advantage of PIM is the fastproduction of new create materials and material compositions.The objectives of the future work will be the development andoptimization of the properties of materials produced via PIM. Allactivities are in terms of the correlation of the PIM process chainprocess parameters and the obtained material properties. Allinvestigations are in close cooperation with experts forcharacterization via HHF testing, material development anddesign teams.

Mass production of components for future fusion power plants via one- and two component PIM

https://publikationen.bibliothek.kit.edu/220091855/3816310

Mass production of components for future fusion power plants via one- and two component PIM

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