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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Spectroscopic Methods and Analysis for Nuclear Energy Related Materials
Presentation Title In situ helium implantation and Rutherford backscattering analysis of helium retention in amorphous SiOC
Author(s) Benjamin Ernesto Mejia Diaz, Zhihan Hu, Lin Shao
On-Site Speaker (Planned) Benjamin Ernesto Mejia Diaz
Abstract Scope Amorphous ceramics such as SiOC have been attractive for nuclear applications due to their high melting point, temperature strength, stability, and corrosion resistance. Previous studies show that SiOC is extremely tolerant to irradiation Furthermore, there is no void swelling or cavity formation in helium-implanted SiOC, suggesting that helium is either uniformly diluted or diffuses out of the system. The present study utilized a simultaneous in-situ helium implantation and ion beam analysis technique, by using a dual beam setup at the Accelerator Laboratory of Texas A&M University. The 400 kV accelerator is used to inject helium into SiOC at room temperature, 300°C, and 500°C. After certain helium fluences, 2 MeV proton beam produced from a 1.7 MV accelerator is used to collect Rutherford backscattering spectra of helium in SiOC, as an in-situ characterization method. The study shows that SiOC exhibits ultra-high helium diffusivity, leading to negligible helium retention in the matrix.
Proceedings Inclusion? Planned:
Keywords Nuclear Materials, Ceramics, Other

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Correlative Investigation of Hydride Phase Formation and Transformation in Zircaloy-4 Using In Operando XRD and Feature Relocation EBSD-SEM
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Examination of U19Pu10Zr fluff structure by X-ray tomography and time-of-flight secondary ion mass spectrometry
In-situ Synchrotron Diffraction Investigations of a Scalable, Non-equilibrium Processing Route of ODS Steels for Nuclear Power
In situ helium implantation and Rutherford backscattering analysis of helium retention in amorphous SiOC
Investigating nuclear materials via laser based and positron annihilation spectroscopy techniques to understand their performance
Investigation of Local Defects in Ln-doped UO2: Impact of Fabrication Condition and Lanthanide type
Nano-scale Orientation Mapping Using Electron Backscatter Diffraction
Nanostructural Characterization of Electron Beam Welded Reactor Pressure Vessel Steel via XANES and Nano-CT
Nuclear Materials Research at the Synchrotron
Observing radiation enhanced diffusion in model Fe-Cr alloys and their oxides using atom probe tomography
Quantification of total irradiation damage in nuclear graphite using Raman spectroscopy
Revealing the Crystal Chemistry and Dissolution Kinetics of Doped Uranium Dioxide Nuclear Fuel
Studying the use of x-ray line profile analysis in irradiated materials via atomistic simulations
Synchrotron Characterization of Uranium Boride Alloyed with Chromium Oxidation Behavior
The Surprising Beneficial Effect of Low-Dose Proton Radiation on Suppressing the Corrosion Reactivity of Thermally Oxidized Iron
The use of spatially resolved EELS spectroscopy to elucidate irradiation induced phase transformation in Fe2O3 and Cr2O3 irradiated with ions and its impact on irradiation induced-loop formation
ToF-SIMS Characterization of Irradiated U-Zr FCCI Region Using Spectra Clustering
Vapor analysis by combination spectroscopy in a novel optical cell
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