Paper Title:
Elastic Properties of Dense Organosilicate Glasses Dependent on the C/Si Ratio
  Abstract

Organosilicate glasses (OSG) are of great technological interest as low-k dielectrics. We use ab initio simulations to analyze the influence of the C/Si ratio in OSG on the density and elastic properties of pore-free material to gain a detailed understanding of the origins of these properties in this class of materials. We find that the addition of carbon to amorphous silica leads to a stiffening of the material by removing the bending degrees of freedom of Si-O-Si bonds. This transition in mechanisms of stiffness, leads to a distinctly nonlinear behavior of the bulk and elastic modulus over the C/Si ratio. Experimental results do not contradict our findings, however dominant pore effects impede conclusive comparison.

  Info
Periodical
Materials Science Forum (Volumes 645-648)
Edited by
Anton J. Bauer, Peter Friedrichs, Michael Krieger, Gerhard Pensl, Roland Rupp and Thomas Seyller
Pages
267-270
DOI
10.4028/www.scientific.net/MSF.645-648.267
Citation
J. M. Knaup, H. Li, J. J. Vlassak, E. Kaxiras, "Elastic Properties of Dense Organosilicate Glasses Dependent on the C/Si Ratio", Materials Science Forum, Vols. 645-648, pp. 267-270, 2010
Online since
April 2010
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Price
$32.00
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