Sammendrag
In order to be able to describe and understand the mechanical properties of paper it is essential to know its three-dimensional structure on a micrometer scale; yet reliable, non-destructive and non-disturbing imaging methods are scarce. In the present work it is demonstrated that x-rays from a third generation-synchrotron beam line, which is characterised by a high brilliance, a high degree of uni-directionality and of a considerable degree of transvers spatial coherence, constitute an ideal tool for micro-tomographic imaging, based on using phase contrast. The three-dimensional imaging obtained is demonstrated here by a series of cross-sectional slices of a paper strip at intervals of five micrometers, showing details of voids and individual cellulose fibres.
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