Effect of Electron Beam Irradiation on Bending Strength of Alkali-Free Silica Glass

Abstract

Effects of homogeneous irradiation of electron beam on bending strength were studied for alkali free glass. The irradiation, which was one of short time treatments, enhanced the bending elasticity, as well as increased the bending strength, although the irradiation doesn't largely change the fracture strain. Enhancements of bending elasticity and bending strength can be explained by stabilization of atomic distance induced by nano scopic stress relaxation, which was probably generated by optimum distribution of dangling bonds.

Internal Activation of Thermoplastic Polypropylene GFRTP Composite by Homogeneous Low Energy Electron Beam Irradiation (HLEBI) of the Interlayered Glass Fiber Chopped Strand Mats (GF-CSM) Prior to Assembly

“…5) This generates terminated atoms, which act as reaction sites to enhance bonding and interfacial friction at the fiber/matrix interface with the PP polymer, and as reported in other studies enhances strength of the fiber itself. 6,7) Improvement of the impact value of the PP matrix GFRTP by the new process of applying HLEBI to the GF-CSM to both sides prior to assembly with the PP polymer strengthens the GFRTP internally in all the CSM layers throughout the bulk thickness.…”

“…HLEBI has improved not only the bending fracture strain of GF, but also the strength on Charpy impact test of CFRP. 6,7) Our recent research has shown HLEBI also enhances the impact value of Charpy impact test of thermohardened epoxy matrix-GFRP. 8) Glass fiber reinforced thermoplastic polymers (GFRTPs), already applied for automobile bumper and IC (integrated circuit) substrate, can be easily produced with high productivity for mass production by various forming process.…”