Ice-Templated W-Cu Composites with High Anisotropy
Controlling anisotropy in self-assembled structures enables engineering of materials with highly directional response. Here, we harness the anisotropic growth of ice walls in a thermal gradient to assemble an anisotropic refractory metal structure, which is then infiltrated with Cu to make a composi...
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| creator | Röthlisberger, André Häberli, Sandra Galinski, Henning Dunand, David C Spolenak, Ralph |
| description | Controlling anisotropy in self-assembled structures enables engineering of materials with highly directional response. Here, we harness the anisotropic growth of ice walls in a thermal gradient to assemble an anisotropic refractory metal structure, which is then infiltrated with Cu to make a composite. Using experiments and simulations, we demonstrate on the specific example of tungsten-copper composites the effect of anisotropy on the electrical and mechanical properties. The results are compared to isotropic tungsten-copper composites fabricated by standard powder metallurgical methods. Our results have the potential to fuel the development of more efficient materials, used in electrical power grids and solar-thermal energy conversion systems. The method presented here can be used with a variety of refractory metals and ceramics, which fosters the opportunity to design and functionalize a vast class of new anisotropic load-bearing hybrid metal composites with highly directional properties. |
| doi_str_mv | 10.48550/arxiv.1708.06801 |
| format | Article |
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| subjects | Anisotropy Composite materials Copper Electric power grids Energy conversion Mechanical properties Physics - Materials Science Powder metallurgy Refractory materials Refractory metals Self-assembly Systems (metallurgical) Thermal energy Tungsten |
| title | Ice-Templated W-Cu Composites with High Anisotropy |
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