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From Atomic Scale Characterization to Nuclear Reactors: How Atom Probe Tomography Can be Used to Identify Fundamental Mechanisms in Nuclear Environments
Nuclear reactors are extreme environments which have many environmental effects which occur simultaneously including irradiation, corrosion, aging, and creep. This can cause unique oxidation of materials, enhanced precipitation, and kinetically driven (rather than thermodynamically driven) segregation. Many of these phenomena can be detected using other methods, but techniques even as high magnification as transmission electron microscopy fail to deliver both high resolution atomistic scale chemical information, 3-D chemical mapping, and suffer from limited chemical resolution. Atom probe tomography can provide new insights into fundamental mechanisms and microstructures in nuclear materials which have significant impacts on nuclear materials performance. In this webinar we will discuss some of the specific topics in nuclear materials development and how atom probe can be used in combination with other techniques to understand materials behavior in extreme environments.


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Dr. Andrew Hoffman
Lead Scientist @GE
Dr. Andrew Hoffman is a Lead Scientist at GE Research located in Niskayuna, NY. Currently Andrew is a key supporter of GE’s accident tolerant nuclear fuels program where GE is developing advanced coatings and FeCrAl alloys for use in nuclear reactors. Additionally, Andrew is leading a program on spent nuclear fuel management, and is involved in industrial development of alloys and coatings for Nuclear and other commercial applications. Prior to joining GE Research, Andrew received his PhD at Missouri University of Science and Technology working under Prof. Haiming Wen where much of his dissertation work involved the use of advanced characterization techniques (including atom probe) to characterize stainless alloys manufactured using advanced techniques before and after irradiation. Andrew also holds an MS in Physics from Idaho State University, and a BS in physics from Brigham Young University.