GHz频率下YTZP陶瓷和聚四氟乙烯的直接应力光学系数。

Direct stress optic coefficients for YTZP ceramic and PTFE at GHz frequencies.

作者信息

Schemmel Peter, Diederich Gilles, Moore Andrew J

出版信息

Opt Express. 2016 Apr 18;24(8):8110-9. doi: 10.1364/OE.24.008110.

DOI:10.1364/OE.24.008110

Abstract

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.

摘要

我们报告了首次对氧化钇部分稳定氧化锆（YTZP）陶瓷的直接应力光学系数进行的测量，测量使用了260至380 GHz的光照，施加应力高达27 MPa。在整个施加应力范围内，YTZP的折射率随应力呈线性变化。还测量了聚四氟乙烯（PTFE）的直接应力光学系数。PTFE在应力值高于4.5 MPa时表现出粘弹性行为。这些结果为在吉赫兹和太赫兹频率下对结构陶瓷和陶瓷涂层系统进行定量亚表面应力测量开辟了道路。