Bauchy, Mathieu

Hansen, Søren Ravn

Januchta, Kacper

Smedskjær, Morten Mattrup

Østergaard, Martin Bonderup

English

    Aalborg UniversitetSearch for High Poisson’s Ratio Oxide GlassesSmedskjær, Morten Mattrup; Hansen, Søren Ravn; Januchta, Kacper; Østergaard, MartinBonderup; Bauchy, MathieuPublication date:2019Link to publication from Aalborg UniversityCitation for published version (APA):Smedskjær, M. M., Hansen, S. R., Januchta, K., Østergaard, M. B., & Bauchy, M. (2019). Search for HighPoisson’s Ratio Oxide Glasses. 60. Abstract from 25th International Congress on Glass, Boston, United States.General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.            ? Users may download and print one copy of any publication from the public portal for the purpose of private study or research.            ? You may not further distribute the material or use it for any profit-making activity or commercial gain            ? You may freely distribute the URL identifying the publication in the public portal ?Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access tothe work immediately and investigate your claim.Downloaded from vbn.aau.dk on: November 24, 2020Search for High Poisson’s Ratio Oxide Glasses Morten M. Smedskjaer1, Søren R. Hansen1, Kacper Januchta1, Martin B. Østergaard1, Mathieu Bauchy2 1Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark 2Department of Civil and Environmental Engineering, University of California, Los Angeles, USA  Oxide glasses are brittle materials, i.e., they cannot deform plastically on the macroscale without fracture, which seriously limits the scope of their applications. Intrinsic ductility in metallic glasses has been found to increase with Poisson’s ratio, which measures the resistance of a material to volume change balanced against the resistance to shape change. An abrupt brittle-to-ductile (BTD) transition has been found to occur around a Poisson’s ratio of 0.32, with simulation results suggesting that the BTD transition is universal and should also occur in silica-based oxide glasses. Moreover, high Poisson’s ratio has been related with a high tendency to deform through shear flow during sharp contact loading. Yet, very few oxide glasses with such high Poisson's ratio have been reported and the mechanical properties of oxide glasses with Poisson's ratio ≥ 0.30 are poorly understood. In this talk, we report on our search for oxide glasses with Poisson’s ratio > 0.32 using both compositional optimization and pressure treatment. We test the proposed relationships of Poisson’s ratio with atomic packing density, indentation deformation mechanism, liquid fragility, and fracture energy. 

Search for High Poisson’s Ratio Oxide Glasses

https://vbn.aau.dk/ws/files/305870900/2019ICG_Poisson_s_ratio.pdf

Search for High Poisson’s Ratio Oxide Glasses

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