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Three-Dimensional Nuclear Magnetic Resonance and X-Ray Microtomographic Imaging of Composite Materials

Published online by Cambridge University Press:  22 February 2011

S.L. Dieckman ,
P. Rizo ,
N. Gopalsami  and
R. E. Botto
S.L. Dieckman
Affiliation:
Materials and Components Technology Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439
P. Rizo
Affiliation:
L.E.T.I./Départment Systèmes, C.E.A./ C.E.N.G. 85X Avenue des Martyrs 38041 Grenoble Cedex, France.
N. Gopalsami
Affiliation:
Materials and Components Technology Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439
R. E. Botto
Affiliation:
Chemistry Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439.
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Abstract

This paper presents a new, three-dimensional (3-D) nuclear magnetic resonance (NMR) imaging technique for spatially mapping proton distributions in green-state ceramic composites. The technique is based on a 3-D back-projection protocol for data acquisition, and a reconstruction technique based on 3-D Radon transform inversion. In principle, the 3-D methodology provides higher spatial resolution of solid materials than is possible with conventional slice-selection protocols. The applicability of 3-D NMR imaging has been demonstrated by mapping the organic additive distribution (2.5 wt.%) in cold-pressed Si34 whisker-reinforced Si34 ceramic composites. Three-dimensional X-ray computed tomography (CT) also has been employed for mapping voids and inclusions within the composite specimen. Combining information from both imaging modalities provides an extremely powerful nondestructive evaluation tool for materials characterization.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 217: Symposium U – Advanced Tomographic Imaging Methods for the Analysis of Materials , 1990 , 169
Copyright
Copyright © Materials Research Society 1991

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References

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