Eichhorn Franziska, Bytomski Julia, Gerauer Markus, Kakimoto Ken-Ichi, Fey Tobias
Department of Material Science and Engineering, Institute of Glass and Ceramics, Friedrich-Alexander-Universität of Erlangen-Nürnberg, Martensstr. 5, D-91058 Erlangen, Germany.
Frontier Research Institute for Materials Science, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
Materials (Basel). 2022 Nov 8;15(22):7893. doi: 10.3390/ma15227893.
Honeycomb-based, modular composites with a relative density of 0.3948 and a slenderness ratio of 6.48 were fabricated on PZT building blocks connected with a PZT-filled phenyl silicone resin. The macro- and micro-structure, phase composition, and the interface between the two materials were analyzed by SEM and image analysis techniques. The mechanical strain response was determined with uniaxial compression tests and the piezoelectric strain response was determined by applying an electric field. These deformations were analyzed by a 2D digital image correlation analysis to calculate the mechanical strain amplification of monolithic and composite PZT lattice structures. Compared to bulk PZT, the piezoelectric strain amplification in the Y-direction || was higher by a factor of 69 for the composite and by a factor of 12 for the monolithic cellular PZT lattice, when it was assumed that the ratio of the deformation of the bulk material to bulk material was 1. The mechanical amplification of the composite lattices increased up to 73 and that of the cellular PZT lattices decreased to 12. Special focus was given to the fracture behavior and the interface of the PZT/PZT-filled phenyl silicone resin interface.
基于蜂窝结构的模块化复合材料，其相对密度为0.3948，长细比为6.48，是在与填充有PZT的苯基硅树脂相连的PZT积木上制造的。通过扫描电子显微镜（SEM）和图像分析技术对宏观和微观结构、相组成以及两种材料之间的界面进行了分析。通过单轴压缩试验确定机械应变响应，并通过施加电场确定压电应变响应。通过二维数字图像相关分析对这些变形进行分析，以计算整体式和复合式PZT晶格结构的机械应变放大率。与块状PZT相比，当假定块状材料的变形比为1时，复合材料在Y方向||上的压电应变放大率高出69倍，整体式蜂窝状PZT晶格高出12倍。复合晶格的机械放大率增加到73，而蜂窝状PZT晶格的机械放大率降低到12。特别关注了PZT/填充PZT的苯基硅树脂界面的断裂行为和界面。
