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Ultralow thermal conductivity and mechanical resilience of architected nanolattices.

Jagt, R.A. (2017) Ultralow thermal conductivity and mechanical resilience of architected nanolattices. Master's Thesis / Essay, Applied Physics.

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Abstract

The use of architecture in nanoarchitected material enables the independent manipulation of coupled physical attributes and the development of materials with unprecedented capabilities. Ceramics have some of the highest strength- and stiffness-to-weight ratios of any material and have intrinsically low thermal conductivity, but are suboptimal for use as structural materials because of their brittleness and sensitivity to flaws. Here it is demonstrated that the creation of structural metamaterials composed of nanoscale ceramics can create materials which are simultaneously ultralight, strong, thermally insulating and mechanically resilient, meaning that it can recover its original shape after compressions in excess of 50% strain. The measured combination of specific modulus (stiffness divided by density) and thermal conductivities have not been found in any other material. Further decoupling of mechanical and thermal properties for specific materials could be achieved by using classical size effects present in thin films.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Applied Physics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 08:30
Last Modified: 15 Feb 2018 08:30
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/15587

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