Engineered thin films with ultra-low thermal expansion coefficient for deformable space structures

Namiko Yamamoto, Eleftherios Gdoutos, Chiara Daraio

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

Abstract

We developed micro-structured thin films with ultra-low coefficient of thermal expansion. These low-weight, flexible, thermally stable films are expected to be a useful tool in aerospace applications, for example, as a reflective layers of deformable space telescope mirrors. The low-CTE films are composed of a Ti frame supporting hexagonal Al plates arranged in a two-dimensional periodic lattice. The effective CTE of these materials can be controlled by selecting the appropriate constitutent material properties of the frame and plates, and the geometry of the lattice. Aluminum and titanium were selected as constituent materials to create thin films with a CTE close to zero. The 2D bi-metallic lattice was microfabricated, and characterized for its thermal and optical functionalities. The effective CTE was confirmed to be ultra-low (-0.6×10-6/°C), and the imaging capability of this metallic layer was evaluated in the range of temperature from room temperature to 150 °C.

Original languageEnglish (US)
Title of host publication54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
DOIs
StatePublished - 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, United States
Duration: Apr 8 2013Apr 11 2013

Publication series

Name54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Other

Other54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityBoston, MA
Period4/8/134/11/13

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

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