Small-Angle Neutron Scattering from Porosity in Sintered Alumina |
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| Authors: | K A Hardman-Rhyne N F Berk |
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| Affiliation: | Institute for Materials Science and Engineering, National Bureau of Standards, Gaithersburg, Maryland 20899 |
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| Abstract: | A new approach for studying porosity in ceramic or metallic materials has been developed using multiple neutron scattering in the small-angle regime. This technique enables the measurement of voids from 0.08 to 10 μm in size with 1% to 50% porosity. Whereas a fully dense alumina sample showed no evidence of multiple neutron-scattering effects, a more porous alumina exhibited striking neutron wavelength dependence. The voids in the latter material are 1.48 μm in mean diameter and 10.5% in volume fraction. |
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