Fabrication and characterization of bi-metallic, structured films with ultra-low thermal expansion

Namiko Yamamoto, Eleftherios Gdoutos, Chiara Daraio

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

Abstract

We fabricate and characterize bi-metallic structured thin films (∼1 um thick) with ultra-low effective coefficient of thermal expansion (CTE). The films consist of a periodic array of aluminum (Al) hexagonal plates attached to a titanium (Ti) frame. In this designed discontinuous geometry, the self-standing films present ultra-low effective CTE through local release of the thermal strains by relative rotation of the lattice elements. We fabricated this structured film by a combination of conventional micro-fabrication process steps, and we measured its CTE as ultra-low (-0.6 × 10-6/ °C) using 3D digital image correlation. This new thin film can lead to the creation of low-cost, adaptive structures that operate in extreme thermal environments, such as reflective layers for space telescopes.

Original languageEnglish (US)
Title of host publicationExperimental Mechanics of Composite, Hybrid, and Multifunctional Materials - Proceedings of the 2013 Annual Conference on Experimental and Applied Mechanics
Pages85-88
Number of pages4
DOIs
StatePublished - Jan 1 2014
Event2013 Annual Conference on Experimental and Applied Mechanics - Lombard, IL, United States
Duration: Jun 3 2013Jun 5 2013

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume6
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2013 Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityLombard, IL
Period6/3/136/5/13

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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    Yamamoto, N., Gdoutos, E., & Daraio, C. (2014). Fabrication and characterization of bi-metallic, structured films with ultra-low thermal expansion. In Experimental Mechanics of Composite, Hybrid, and Multifunctional Materials - Proceedings of the 2013 Annual Conference on Experimental and Applied Mechanics (pp. 85-88). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 6). https://doi.org/10.1007/978-3-319-00873-8_11