Journal article
Three-dimensional characterization of the permeability of W-Cu composites using a new "triBeam" technique
MP Echlin, A Mottura, M Wang, PJ Mignone, DP Riley, GV Franks, TM Pollock
Acta Materialia | Published : 2014
Abstract
Large three-dimensional microstructural datasets have been gathered for two W-Cu composites of 10 and 15 wt.% Cu using the TriBeam system via in situ femtosecond laser sectioning in a scanning electron microscope. Laser ablation was performed on W-Cu samples along a 90 edge, milling parallel with the imaging surface. Secondary electron images for 1000 two-dimensional slices were segmented into binary images representing Cu and W components using EM/MPM (expectation-maximization/maximization of the posterior marginals) image-processing algorithms. A statistically random volume sampling approach has been employed to evaluate the microstructural and property volume element sizes necessary for t..
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Awarded by National Science Foundation
Funding Acknowledgements
We acknowledge the support of the MRSEC Program of the National Science Foundation through DMR-1121053. We also would like to thank Professor Marc De Graef (CMU) for his assistance with image segmentation of the datasets (EM/MPM software), David Rowenhorst for IDL-based 3-D reconstruction software, Will Lenthe for discussion on statistical analysis, and the Office of Naval Research ONR-DURIP Grant N000141010783 for support of the development of the TriBeam system. We would also like to thank the Defence Materials Technology Centre for the Ph.D. scholarships for P.M. and M.W. as well as additional funding. We also greatly appreciate the useful discussions with Trevor R. Finlayson, and Jamie Whiteford (BAE Systems) for providing the W-Cu samples.