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
- Author
- 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
- 10.1016/j.matlet.2014.10.097
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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