A Monolithic Micro-Tensile Tester for Investigating Silicon Dioxide Polymorph Micromechanics, Fabricated and Operated Using a Femtosecond LaserReport as inadecuate




A Monolithic Micro-Tensile Tester for Investigating Silicon Dioxide Polymorph Micromechanics, Fabricated and Operated Using a Femtosecond Laser - Download this document for free, or read online. Document in PDF available to download.

Galatea lab, STI-IMT, Ecole Fédérale Polytechnique de Lausanne EPFL, Rue de la Maladière, 71b, Neuchâtel CH-2002, Switzerland





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Academic Editor: Maria Farsari

Abstract Mechanical testing of materials at the microscales is challenging. It requires delicate procedures not only for producing and handling the specimen to be tested, but also for applying an accurate and controlled force. This endeavor is even more challenging when it comes to investigating the behavior of brittle materials such as glass. Here, we present a microtensile tester for investigating silica glass polymorphs. The instrument is entirely made of silica and for which the same femtosecond laser is not only used for fabricating the device, but also for operating it loading the specimen as well as for performing in situ measurements. As a proof-of-concept, we present a stress-strain curve of fused silica for unprecedented high tensile stress of 2.4 GPa, as well as preliminary results of the elastic modulus of femtosecond laser-affected zones of fused silica, providing new insights on their microstructures and mechanical behavior. View Full-Text

Keywords: silica; mechanical characterization; micro-tensile tester; femtosecond laser; micromachining; third-harmonics generation THG; flexures silica; mechanical characterization; micro-tensile tester; femtosecond laser; micromachining; third-harmonics generation THG; flexures





Author: Christos-Edward Athanasiou * and Yves Bellouard

Source: http://mdpi.com/



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