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Micromachines 2015, 6(9), 1365-1386; doi:10.3390/mi6091365

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

Galatea lab, STI/IMT, Ecole Fédérale Polytechnique de Lausanne (EPFL), Rue de la Maladière, 71b, Neuchâtel CH-2002, Switzerland
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Author to whom correspondence should be addressed.
Academic Editor: Maria Farsari
Received: 9 August 2015 / Revised: 7 September 2015 / Accepted: 10 September 2015 / Published: 21 September 2015
(This article belongs to the Collection Laser Micromachining and Microfabrication)
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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
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Athanasiou, C.-E.; Bellouard, Y. A Monolithic Micro-Tensile Tester for Investigating Silicon Dioxide Polymorph Micromechanics, Fabricated and Operated Using a Femtosecond Laser. Micromachines 2015, 6, 1365-1386.

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