Acoustic emission generated during scratch test of various thin films

0439726 - FZÚ 2015 RIV DE eng J - Článek v odborném periodiku
Boháč, Petr - Tomáštík, J. - Čtvrtlík, R. - Dráb, M. - Koula, V. - Cvrk, K. - Jastrabík, Lubomír
Acoustic emission generated during scratch test of various thin films.
E-Journal of Nondestructive Testing & Ultrasonics. Roč. 19, č. 12 (2014), s. 16635. ISSN 1435-4934
Grant CEP: GA TA ČR TA03010743
Institucionální podpora: RVO:68378271
Klíčová slova: acoustic emission * scratch test * thin films * AE data analysis * mechanical toughness
Kód oboru RIV: BI - Akustika a kmity

The method is demonstrated on various thin film–substrate systems.Start of the AE recording is synchronized with the start of the actual load and penetration of the stylus tip (during the scratch test), which enables very accurate matching of acoustic events with the progress of method of the scratch test. It can be mainly used for investigation of brittle films.It can reveal cohesion rupture either on the surface or inside of the material or adhesion ruptures of the film to the substrate. The method is also useful for investigation of transparent films in cases where the microscopic scanning is failing. Results of testing experiments are presented and compared.
Trvalý link: http://hdl.handle.net/11104/0242944