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|Title:||Nano-scale quasi-melting of alkali-borosilicate glasses under electron irradiation||Authors:||M�bus G.
|Issue Date:||2010||Publisher:||ScienceDirect||Citation:||M�bus G., Ojovan M., Cook S., Tsai J., Yang G. (2010). Nano-scale quasi-melting of alkali-borosilicate glasses under electron irradiation. Journal of Nuclear Materials 396 : 264-271. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jnucmat.2009.11.020||Abstract:||Quasi-melting of micro- and nano-samples during transmission electron microscope irradiation of glassy materials is analysed. Overheating and true melting by the electron beam is shown not to be an explanation due to the ultra-sharp boundary between transformed and intact material. We propose that the observed fluidisation (quasi-melting) of glasses can be caused by effective bond breaking processes induced by the energetic electrons in the electron beam. The bond breaking processes modify the effective viscosity of glasses to a low activation energy regime. The higher the electron flux density the lower is the viscosity. Quasi-melting of glasses at high enough electron flux densities can result in shape modification of nano-sized particles including formation of perfect beads due to surface tension. Accompanying effects, such as bubble formation and foil bending are revisited in the light of the new interpretation. � 2009 Elsevier B.V. All rights reserved.||Source Title:||Journal of Nuclear Materials||URI:||http://scholarbank.nus.edu.sg/handle/10635/149273||ISSN:||223115||DOI:||10.1016/j.jnucmat.2009.11.020|
|Appears in Collections:||Staff Publications|
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