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Real-time observation of hydrogen absorption by LaNi₅ with quasi-dynamic neutron tomography Public Deposited

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  • The uptake of hydrogen by lanthanum pentanickel (LaNi₅) to form lanthanum nickel hydride (LaNi₅H₆) is followed with three-dimensional imaging by neutron tomography. The hydrogen absorption process is slower than the time needed for acquiring a single radiograph, about 10 s, but fast relative to the time to acquire a fully-sampled tomographic data set, about 6000 s. A novel data acquisition scheme is used with angles based upon the Greek Golden ratio, a scheme which allows considerable flexibility in post-acquisition tomography reconstruction. Even with tomographic undersampling, the granular structure for the conversion of LaNi₅ particles to LaNi₅H₆ particles is observed and visually tracked in 3D. Over the course of five sequential hydrogen uptake runs with various initial hydrogen pressures, some grains are repeatedly observed.
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  • Wood, B. M., Ham, K., Hussey, D. S., Jacobson, D. L., Faridani, A., Kaestner, A., ... & Butler, L. G. (2014). Real-time observation of hydrogen absorption by LaNi₅ with quasi-dynamic neutron tomography. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 324, 95-101. doi:10.1016/j.nimb.2013.10.052
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  • 324
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  • The NIST authors acknowledge support from the U.S. Departmentof Commerce, the NIST Radiation Physics Division, the Director’soffice of NIST, the NIST Center for Neutron Research, and theDepartment of Energy through interagency agreement No. DEAI01–01EE50660. L.G.B. and T.A.D. gratefully acknowledge the supportof materials science tomography from the National ScienceFoundation (CHE-0910937) and the NSF EPSCoR CooperativeAgreement No. EPS-1003897 with additional support from theLouisiana Board of Regents. A.F. also acknowledges NSF support(DMS-0709495). P.L. and J.J.V. acknowledge supportfrom the Center on Nanostructuring for Efficient Energy Conversion(CNEEC) at Stanford University, an Energy Frontier ResearchCenter funded by the U.S. Department of Energy, Office of Science,Office of Basic Energy Sciences under Award Number DESC0001060.
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  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-05-20T20:45:13Z No. of bitstreams: 1 FaridaniAdelMathematicsReal-TimeObservation.pdf: 1990528 bytes, checksum: ee9814928304cb10eae6125396eb930e (MD5)
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