This paper describes the technique of anisotropic multiple small-angle neutron scattering (MSANS). Anisotropic MSANS, when combined with anisotropic Porod scattering, electron microscopy, and measurements of elastic modulus and density, has made possible the determination of the porosities, surface areas, mean opening dimensions, mean diameters, and approximate orientation distributions, of the intra-splat cracks and interlamellar pores, as well as the porosity, surface area, and mean diameter, of the globular pores. The changes in these parameters, as a function of annealing, are studied. Paper includes a German-language abstract.

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