Experimental Mechanics

, Volume 37, Issue 1, pp 21–25 | Cite as

Thermal expansion measurement of composites with optical heterodyne interferometry

  • F. De Bona
  • A. Somá
Article

Abstract

A dilatometer based on an optical heterodyne laser interferometer for high-precision measurements of thermal expansion coefficient (α) has been developed. The instrument is mainly intended for measuring low-expansion composites at room temperature. Compared with already existing instruments, the proposed system is characterized by a higher thermal expansion resolution (30 nm/m). In the case of low-expansion composites, intervals of uncertainty of α lower than 0.1 μm/mK have been obtained.

Keywords

Mechanical Engineer Thermal Expansion Fluid Dynamics Expansion Coefficient Thermal Expansion Coefficient 

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Copyright information

© Society for Experimental Mechanics, Inc. 1997

Authors and Affiliations

  • F. De Bona
    • 1
  • A. Somá
    • 2
  1. 1.Dipartimento di Ingegneria Elettrica Gestionale e MeccanicaUniversitá di UdineUdineItaly
  2. 2.Dipartimento di MeccanicaPolitecnico di TorinoTorinoItaly

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