Electric current dependent fracture in GaN piezoelectric semiconductor ceramics
MetadataShow full item record
In this paper, the fracture behavior of GaN piezoelectric semiconductor ceramics was investigated under combined mechanical and electric loading by using three-point bending tests and numerical analysis. The experimental results demonstrate that, in contrast to traditional insulating piezoelectric ceramics, electric current is a key factor in affecting the fracture characteristics of GaN ceramics. The stress, electric displacement, and electric current intensity factors were numerically calculated and then a set of empirical formulae was obtained. By fitting the experimental data, a fracture criterion under combined mechanical and electrical loading was obtained in the form of an ellipsoid function of intensity factors. Such a fracture criterion can be extended to predict the failure behavior of other piezoelectric semiconductors or devices with a crack, which are useful in their reliability design and applications.
Showing items related by title, author, creator and subject.
Influence of electric field and current on the strength of depoled GaN piezoelectric semiconductive ceramicsQin, G.; Ma, S.; Lu, Chunsheng; Wang, G.; Zhao, M. (2017)By using three-point bending tests, the effects of an applied DC electric field and current on the strength of depoled GaN piezoelectric semiconductive ceramics are investigated. Under combined mechanical-voltage-electrical ...
Influence of polarization on the electromechanical properties of GaN piezoelectric semiconductive ceramicsZhao, M.; Ma, S.; Lu, Chunsheng; Fan, C.; Qin, G. (2018)By using three-point bending tests and numerical simulation, influence of polarization on the electromechanical properties of GaN piezoelectric semiconductive ceramics (PSCs) were investigated in this paper. The results ...
Lumentut, Mikail F. (2011)This research investigates vibration energy harvesting by modelling several piezoelectric-based structures. The usage of piezoelectric transduction under input vibration environments can be profitable for obtaining ...