Abstract
Film-substrate’s interfacial bonding strength is closely related to film quality. An excellent interfacial bonding strength is the premise for the well use of film. The laser detecting technique of discrete scratches based on laser shockwave effect is a new method, which can measure interfacial bonding strength. With this technique, film-substrate system is of transient load of different laser energy, the relation between the dynamic response characteristics of such film-substrate system and film-substrate’s interfacial bonding strength is a core problem to be solved urgently. On this basis, this paper conducted research on the dynamic response characteristics of film-substrate system during laser loading process using detecting technique of PVDF patch sensor. Results show that under the irradiation of different laser energy, it can detect dynamic responses of theory models of different film-substrate system using PVDF patch sensor, wherein shockwave dynamic response and dynamic strain response are included. Laser energy and interfacial bonding strength are of a regular influence to the dynamic response of film-substrate system theory model.
Highlights
The laser detecting technique of discrete scratches is developed on the basis of laser spallation and laser scratchHow to cite this paper: Cheng, B.Y., Feng, A.X., Mao, J.C., Cao, Y.P., Wu, H., Zhuang, X.H., Li, Z.Q. and Yu, H. (2016) Experimental Research of Dynamic Response of Laser-Induced Film-Substrate System
Delving into dynamic response characteristics of filmsubstrate system under irradiation of pulsed laser could monitor the propagation rule of shockwave and filmsubstrate interface effect at the same time, which was conductive to revealing the failure mechanism of film-substrate system
American scientists Gupta et al [5] measured the interface tension strength between two reinforced ceramic composites in 1992 and at the same time, ABAQUS software was adopted for simulation of elastic wave propagation and for process of transient heat transfer. He Pengfei et al [6] from Shanghai Jiaotong University probed into microscopic damages of composite microstructures under the irradiation of pulsed laser in 1994, explored the correlation between failure mechanism of interfacial bonding strength and interface cracking strength, proposed the laser detecting technique of discrete scratches based on above scientific achievements and made some progress
Summary
How to cite this paper: Cheng, B.Y., Feng, A.X., Mao, J.C., Cao, Y.P., Wu, H., Zhuang, X.H., Li, Z.Q. and Yu, H. (2016) Experimental Research of Dynamic Response of Laser-Induced Film-Substrate System. American scientists Gupta et al [5] measured the interface tension strength between two reinforced ceramic composites in 1992 and at the same time, ABAQUS software was adopted for simulation of elastic wave propagation and for process of transient heat transfer He Pengfei et al [6] from Shanghai Jiaotong University probed into microscopic damages of composite microstructures under the irradiation of pulsed laser in 1994, explored the correlation between failure mechanism of interfacial bonding strength and interface cracking strength, proposed the laser detecting technique of discrete scratches based on above scientific achievements and made some progress. This paper detected the laser shockwave by bonding PVDF on the back of matrix based on the established theoretical film-substrate system and delved into both the laser energy and the influence on dynamic respond of film-substrate system by interfacial bonding strength At this time, the detection results are free from the effect of laser thermal and thermal stress without any complex consideration, which has provided a reference to reveal the failure mechanism of film-substrate system
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