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3D morphological evolution of porous titanium by x-ray micro- and nano-tomography

Published online by Cambridge University Press:  14 June 2013

Yu-chen Karen Chen-Wiegart
Affiliation:
Photon Science Directorate, Brookhaven National Laboratory, Upton, New York 11973
Takeshi Wada
Affiliation:
Institute for Materials Research, Tohoku University, Katahira, Sendai, Japan 980-8577
Nikita Butakov
Affiliation:
Photon Science Directorate, Brookhaven National Laboratory, Upton, New York 11973; andDepartment of Electrical Engineering, University at Buffalo, Buffalo, New York 14261
Xianghui Xiao
Affiliation:
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
Francesco De Carlo
Affiliation:
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
Hidemi Kato
Affiliation:
Institute for Materials Research, Tohoku University, Katahira, Sendai, Japan 980-8577
Jun Wang*
Affiliation:
Photon Science Directorate, Brookhaven National Laboratory, Upton, New York 11973
David C. Dunand
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208
Eric Maire
Affiliation:
MATEIS Laboratory, Institut National des Sciences Appliquées, Lyon, France 69621
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The 3D morphological evolution of titanium foams as they undergo a two-step fabrication process is quantitatively characterized through x-ray micro- and nano-tomography. In the first process step, a Cu–Ti–Cr–Zr prealloy is immersed in liquid Mg, where Cu is alloyed with Mg while a skeleton of crystalline Ti–Cr–Zr is created. In the second step, the Mg–Cu phase is etched in acid, leaving a Ti–Cr–Zr foam with submicron struts. 3D images of these solidified Ti–Cr–Zr/Mg–Cu composites and leached Ti–Cr–Zr foams are acquired after 5, 10, and 30 min exposure to liquid Mg. As the Mg exposure time increases, the Ti–Cr–Zr ligaments grow in size. The tortuosity loosely follows the Bruggeman relation. The interfacial surface distribution of these Ti-foams is qualitatively similar to other nano-porous metal prepared by one-step dealloying. The characteristic length of the Mg–Cu phase and pores are also reported.

Type
Invited Papers
Copyright
Copyright © Materials Research Society 2013 

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