What Nano can do for Nuclear with in situ Electrochemomechanical Testing

J. Li
Massachusetts Institute of Technology, US

Keywords: nanocnuclear materials

Summary:

In this talk I will focus on applying in situ transmission electron microscopy (TEM) and lab-on-a-chip to mechanistic investigations of nuclear energy materials. Recent advances in nano-manipulation, environmental TEM and MEMS have allowed us to investigate coupled mechanical and electrochemical phenomena with unprecedented spatial and temporal resolutions [Science 330 (2010) 1515; Nano Letters 11 (2011) 4535; ACS Nano 6 (2012) 9425]. For example, we can now quantitatively characterize liquid-solid [Nature Nano. 8 (2013) 277] and gas-solid interfaces at nanometer resolution for in situ corrosion and fatigue processes. Zirconium fuel-cladding oxidation, hydrogen embrittlement, and fatigue crack propagation [PNAS 110 (2013) 19725] at nanoscale will be highlighted in this talk. These in situ experiments greatly complement our modeling efforts, and together they provide details and insight into how materials degrade in service due to combined electrochemical-mechanical actions.