Kury, Peter; Horn-von Hoegen, Michael:
Impact of thermal dependence of elastic constants on surface stress measurements
2004
In: Review of Scientific Instruments, Jg. 75 (2004), Heft 5, 1357 (2p)
Artikel/Aufsatz in Zeitschrift / Fach: Physik
Fakultät für Physik » Experimentalphysik
Titel:
Impact of thermal dependence of elastic constants on surface stress measurements
Autor(in):
Kury, Peter; Horn-von Hoegen, Michael im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen
Erscheinungsjahr
2004
Erschienen in:
Review of Scientific Instruments, Jg. 75 (2004), Heft 5, 1357 (2p)
ISSN
ISSN
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Abstract:

The accuracy of surface stress data obtained by means of bending sample methods depends on the precise knowledge of the biaxial Youngs modulus E/1−ν which enters as a prefactor in the stress calculation formula of Stoney and describes the stiffness of the sample’s material against biaxial deformation. Room temperature values are commonly used for E/1−ν. However, E/1−ν is significantly temperature dependent. A second order polynomial fit of this dependence is presented for the benefit of future measurements as well as a correction curve for old data