<RESEARCH REPORT>Fracture Mechanism of Fine Grain Graphite under High Heat Fluxes

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概要

• 論文の詳細を見る

• During the operation in fusion devices graphite in-vessel components can be subjected to severe heat loads. Component fracture which may occur under these heat loads can seriously check the further operation of the entire device. In this study the fracture process under high heat loads is examined on the fine grain graphite Poco AXF-5Q. Laboratory samples which were subjected to pulsed heat loads by a hydrogen beam are compared to a limiter of the same material which suffered fracture damage during operation in the JIPP T-IIU tokamak. The process of fracture under high heat fluxes can be described with a two stage model of crack initiation and subsequent crack propagation. Cracks are initiated by shear under compressive stresses in a highly heated surface layer. The further crack propagation follows the cyclic heat loads and is mainly driven by tensile stresses until fracture occurs. The results of these observations are the basis for efforts to assure reliable component operation under high heat fluxes.

• 核融合科学研究所の論文

著者

• Kuroda T.

  Institute of Plasma Physics, Nagoya University

• Miyahara A.

  Institute Of Plasma Physics Nagoya University

• Miyahara A.

  Institute For Nuclear Study University Of Tokyo

• Bolt H.

  Institute of Plasma Physics, Nagoya University

• Bolt H.

  Institute Of Plasma Physics Nagoya University

関連論文

• Improved Confinement in High Density Ohmic Discharge in JIPP T-IIU
• POWER ABSORPTION AND CONFINEMENT STUDIES OF ICRF-HEATED PLASMA IN JIPP T-IIU TOKAMAK
• Numerical Calculations for the Electrode Design of a Relativistic Electron Beam Diode
• On the Generation of Runaway Electrons and Their Impact to Plasma Facing Components
• On the Operation of Electron Synchrotron at the Institute for Nuclear Study, Tokyo
• Coaxial Marx Generator for Producing Intense Relativistic Electron Beams
• Fracture Mechanism of Fine Grain Graphite under High Heat Fluxes
• RFC-XX : as a Target Plasma of Two Component Neutron Producing Device
• Comparative Study of Energy Accounting for Heavy Ion Fusion with Various Driver Accelerators
• ANALYSIS ON IMPURITY CONTROL EFFECT OF SCRAPE-OFF LAYERS GENERATED BY A PUMP LIMITER AND AN ERGODIC MAGNETIC LIMITER
• Neutron Irradiation Aspect of Graphite and C-C Composite Materials

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