Titanium foams with aligned, elongated pores produced by freeze casting

Y. Chino*, David C Dunand

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Directional freeze-casting - a process used in order to produce foams with elongated, aligned pores applied so far exclusively for ceramics - is demonstrated for a titanium foam. An aqueous slurry of <45 μm titanium powders is directionally solidified, resulting in a preform with elongated, aligned, dendrites of 0.2 wt% agar solution, separated by interdendritic regions with high powdercontent. The preform is freeze-dried to remove the ice dendrites and sintered. The resulting titanium foams show 60 vol% aligned pores (̃0.1 mm width and several millimeters long) replicating theice dendrites and separated by walls constructed by partially-sintered titanium powders. On the other hand, when large size powder (<125 μm) was applied, their larger size inhibits the formationof pure ice dendrites, in agreement with a theoretical model.

Original languageEnglish (US)
Title of host publicationMetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams
Pages263-266
Number of pages4
StatePublished - Nov 27 2008
Event5th International Conference on Porous Metals and Metallic Foams, MetFoam 2007 - Montreal, QC, Canada
Duration: Sep 5 2008Sep 7 2008

Other

Other5th International Conference on Porous Metals and Metallic Foams, MetFoam 2007
Country/TerritoryCanada
CityMontreal, QC
Period9/5/089/7/08

ASJC Scopus subject areas

  • Metals and Alloys

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