Inert Failure Strain Studies of Sodium Silicate Glass Fibers

Abstract

The inert failure strains of glass fibers with the molar compositions xNa2O · (1 − x)SiO2, where 0 less-than-or-equals, slant x less-than-or-equals, slant 0.35, were measured under liquid nitrogen (77 K) using a two-point bending technique. Failure strain increases with increasing Na2O content, from 17.7% for x = 0.00-23.5% for x = 0.35. The inert failure strain depends on the face-plate velocity (Vfp) of the two-point bending test, increasing with increasing Vfp for silica and decreasing with increasing Vfp for the sodium silicate glasses. The magnitude of the latter 'inert delayed failure effect' increases with increasing x. The addition of Na2O to a silicate glass weakens the glass network through the formation of non-bridging oxygens, and the weaker network distorts more at high strains and slower Vfp.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Inert Failure Strain Studies; Sodium Silicate Glass Fiber

International Standard Serial Number (ISSN)

0022-3093; 1873-4812

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Elsevier Inc., All rights reserved.

Publication Date

01 Jan 2004

Link to Full Text

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