We report the first measurement of the direct stress optic coefficient for yttria-partially stabilized zirconia (YTZP) ceramic, using illumination between 260 and 380 GHz with applied stresses up to 27 MPa. YTZP exhibited a linear change in refractive index as a function of stress across the entire applied stress domain. A direct stress optic coefficient was also measured for polytetrafluoroethylene (PTFE). PTFE showed viscoelastic behavior at stress values above 4.5 MPa. These results open the way for quantitative sub-surface stress measurements in structural ceramics and ceramic coating systems at GHz and THz frequencies.
FingerprintDive into the research topics of 'Direct stress optic coefficients for YTZP ceramic and PTFE at GHz frequencies'. Together they form a unique fingerprint.
Schemmel, P. J. (Creator), Diederich, G. (Creator) & Moore, A. J. (Creator), Heriot-Watt University, 30 Jul 2015