Direct stress optic coefficients for YTZP ceramic and PTFE at GHz frequencies.
Direct stress optic coefficients for YTZP ceramic and PTFE at GHz frequencies.
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DOI：
10.1364/oe.24.008110
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发表时间：
2016-04
期刊：
影响因子：
3.8
通讯作者：
Peter J. Schemmel;Gilles Diederich;A. Moore
中科院分区：
文献类型：
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作者：
Peter J. Schemmel;Gilles Diederich;A. Moore
我们报道了首次测量钇-部分稳定氧化锆（YTZP）陶瓷的直接应力光学系数，使用260至380 GHz的照明，外加应力高达27 MPa。YTZP的折射率随应力场的变化呈线性变化。还测量了聚四氟乙烯（PTFE）的直接应力光学系数。在应力值大于4.5 MPa时，PTFE表现出粘弹性。这些结果为结构陶瓷和陶瓷涂层系统在GHz和THz频率下的定量次表面应力测量开辟了道路。
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.