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A new, fine-grain nuclear graphite, grade G347A from Tokai Carbon Co., Ltd., has been irradiated in the High Flux Isotope Reactor at Oak Ridge National Laboratory to study the materials property changes that occur when exposed to neutron irradiation at temperatures of interest for Generation-IV nuclear reactor applications. Specimen temperatures ranged from 290°C to 800 °C with a maximum neutron fluence...
The objective of this work was to systematically study the effects of applied tensile stress, dose rate, temperature, and accumulated dose on the in situ proton irradiation-induced creep behavior of graphite. Experiments were performed on ultra-fine grain POCO Graphite Inc. ZXF-5Q. The irradiation creep rate exhibited a linear dependence on applied tensile stress, dose rate, and temperature and no...
This paper presents the development of an analysis technique and software program to quantify the anisotropy of pyrolytic carbon or ultra-fine grain graphite using selected area electron diffraction (SAED) patterns from a transmission electron microscope. Results serve as input to a computer program that calculates the Bacon anisotropy factor (BAF) and orientation parameter (R). This was achieved...
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