Freeze drying for porous Mo with different sublimable vehicle compositions in the camphor-naphthalene system

Title
Freeze drying for porous Mo with different sublimable vehicle compositions in the camphor-naphthalene system
Authors
김영도
Keywords
Pore structure; Porous Mo; Camphor-naphthalenesystem; Freezedrying
Issue Date
2015-01
Publisher
ELSEVIER SCIENCE BV
Citation
MATERIALS LETTERS, v. 139, Page. 268-270
Abstract
The present study demonstrates how the composition of sublimable vehicle in the binary system affects the pore structure of porous body fabricated by freeze drying process. The 5 vol% MoO3 dispersed slurries with various camphor-naphthalene compositions (eutectic of 35 wt% naphthalene, off-eutectic of 30 and 45 wt% naphthalene) was frozen into a mold at 25 degrees C. Pores were generated by sublimation of the vehicles at room temperature. The green bodies were sintered at 1100 degrees C under a hydrogen atmosphere. The sintered bodies with pure Mo phase showed different pore structures such as dendrite, rodlike and plate shape dependent on the composition of the camphor-naphthalene alloys. Considering that the observed pore structures were a replica of the original structure of crystallized vehicles, morphology developments during solidification of camphor-naphthalene alloys were examined, and the relationship between the morphology of vehicle crystal and pore structure was discussed. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11754/21285http://www.sciencedirect.com/science/article/pii/S0167577X14018977
ISSN
0167-577X
DOI
http://dx.doi.org/10.1016/j.matlet.2014.10.097
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE & ENGINEERING(신소재공학부) > Articles
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