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Past Research Projects

ZnS scintillator for high resolution X-ray imaging at 9 keV
Rapid integrated circuit (IC) inspection using x-ray microscopy requires novel X-ray scintillating materials with high efficiency and high spatial resolution. Current scintillator materials, such as Cesium Iodide (CsI), suffer from a trade-off between efficiency and spatial resolution. Novel materials which can be produced with improved brightness and decreased afterglow are necessary to address the stringent requirements of fast, high resolution X-ray microscopy. (Partners:  CeraNova, WSU Center for Materials Research; Funding: DOD-DMEA
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Related Publications

Apatite and sodalite based glass-bonded waste forms for immobilization of 129I and mixed halide radioactive wastes
We will develop chemically durable glass-bonded ceramic waste forms for immobilization of 129I and mixed halide wastes with focus on: (i) low-temperature synthesis (<200°C) of ceramic minerals and (ii) design of glass compositions with high chemical durability and good sintering ability at temperatures <800°C . Calcium phosphate (CaP) apatite [Ca5(PO4)3X] and sodalite [Na8(AlSiO4)6X2], containing halides (X = Cl, I) will be synthesized at low temperatures using various solution-based synthesis routes to prevent halide volatility, and these minerals will further be consolidated to monolithic waste forms using borosilicate (for sodalite) and phosphate (for CaP-apatite) glass-binders.   (Partners:  Rutgers, PNNL; Funding: DOE-NEUP)
Related Publications

Use of Micro- and Meso-scale Magnetic Characterization Methods to Study Degradation of Reactor Structural Material
We will integrate microstructural metrology, micro-magnetic measurements, and meso-scale phase field modeling to develop advanced tools and techniques that can extract semi-quantitative diagnostic and interpretive information about the state of microstructural damage in a material based on magnetic signature data alone. Improved diagnostic information about materials degradation will greatly enhance reactor safety by reducing uncertainty in assigning safety margins for materials currently in service and for new materials currently in development. This technology has potential for maturation into real-time, in-situ monitoring capability.  (Partners:  PNNL; Funding: DOE-NEUP)

Related Publications

MFM image of Poly Fe