Synthesis, structure and mechanical properties of ice-templated tungsten foams
@article{Rthlisberger2016SynthesisSA,
title={Synthesis, structure and mechanical properties of ice-templated tungsten foams},
author={Andr{\'e} R{\"o}thlisberger and Sandra H{\"a}berli and Ralph Spolenak and David C. Dunand},
journal={Journal of Materials Research},
year={2016},
volume={31},
pages={753-764}
}Tungsten foams with directional, controlled porosity were created by directional freeze-casting of aqueous WO 3 powder slurries, subsequent freeze-drying by ice sublimation, followed by reduction and sintering under flowing hydrogen gas to form metallic tungsten. Addition of 0.51 wt% NiO to the WO 3 slurry improved the densification of tungsten cell walls significantly at sintering temperatures above 1250 °C, yielding densely sintered W–0.5 wt% Ni walls with a small fraction of closed porosity…
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References
SHOWING 1-10 OF 51 REFERENCES
Fabrication of highly porous nickel with oriented micrometer-sized cylindrical pores by gelation freezing method
- Materials Science
- 2015
Preparation and Characterization of Directionally Freeze-cast Copper Foams
- Materials Science
- 2012
Because of their excellent thermal and electric conductivities, copper foams are ideally suited for applications such as heat exchangers, catalyst supports and EMI-shields. Here, we demonstrate the…
Effect of Polyethylene Glycol on the Microstructure of Freeze‐Cast Alumina
- Materials Science
- 2008
Freeze casting has been used to process a range of ceramics with oriented pore structures, and soluble polymers are often used to improve the strength of the material before sintering. This study…
Processing of Titanium Foams
- Materials Science
- 2004
Because of their excellent mechanical properties, low density and biocompatibility, titanium foams are attractive for structural and biomedical applications. This paper reviews current techniques for…
Effect of Macropore Anisotropy on the Mechanical Response of Hierarchically Porous Ceramics
- Materials Science
- 2016
Porous ceramics are commonly used in electrochemical, catalytic, biological, and filtration processes, but in many cases, improvements to their designed performance comes at the expense of their…