Understanding Creep Mechanisms in Graphite with Experiments, Multiscale Simulations, and Modeling

Eapen, Jacob¹  Murty, Korukonda¹  Burchell, Timothy² 

[1]North Carolina State Univ., Raleigh, NC (United States)

[2]Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

关键词: GRAPHITE;    Computerized Simulation;    NEUTRONS;    X-RAY DIFFRACTION;    CREEP;    ELECTRON MICROSCOPY;    Physical Radiation Effects;    CURRENTS;    Crystal Defects;    IRRADIATION;    REACTORS;    Raman Spectroscopy;    X-Ray Spectroscopy;    Electron Microscopy;   

DOI  :  10.2172/1167180
RP-ID  :  DOE/NEUP--09-796
PID  :  OSTI ID: 1167180
Others  :  Other: 09-796
Others  :  TRN: US1500031

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Disordering mechanisms in graphite have a long history with conflicting viewpoints. Using Raman and x-ray photon spectroscopy, electron microscopy, x-ray diffraction experiments and atomistic modeling and simulations, the current project has developed a fundamental understanding of early-to-late state radiation damage mechanisms in nuclear reactor grade graphite (NBG-18 and PCEA). We show that the topological defects in graphite play an important role under neutron and ion irradiation.