Fabrication and characterization of tungsten and graphite based PFC for divertor target elements of ITER like tokamak application |
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| Authors: | S.S. Khirwadkar K.P. Singh M.S. Khan J.J.U. Buch Alpesh Patel Sudhir Tripathi P.M. Jaman L. Rangaraj C. Divakar |
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| Affiliation: | 1. Institute For Plasma Research, Bhat, Gandhinagar, Gujarat, India;2. Materials Science Division, National Aerospace Laboratories, CSIR, Bangalore, Karnataka, India |
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| Abstract: | The development of the fabrication technology of macro-brush configuration of tungsten (W) and carbon (graphite and CFC) plasma facing components (PFCs) for ITER like tokamak application is presented. The fabrication of qualified joint of PFC is a requirement for fusion tokamak. Vacuum brazing method has been employed for joining of W/CuCrZr and C/CuCrZr. Oxygen free high conductivity (OFHC) copper casting on W tiles was performed followed by machining, polishing and ultrasonic cleaning of the samples prior to vacuum brazing. The W/CuCrZr and graphite/CuCrZr based test mockups were vacuum brazed using silver free alloys. The mechanical shear and tensile strengths were evaluated for the W/CuCrZr and graphite/CuCrZr brazed joint samples. The micro-structural examination of the joints showed smooth interface. The details of fabrication and characterization procedure for macro-brush tungsten and carbon based PFC test mockups are presented. |
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