Detail publikace

Changes in Fracture Micromechanism with Increasing Reinforcement Volume Fraction in Glass Matrix Composite

Originální název

Changes in Fracture Micromechanism with Increasing Reinforcement Volume Fraction in Glass Matrix Composite

Anglický název

Changes in Fracture Micromechanism with Increasing Reinforcement Volume Fraction in Glass Matrix Composite

Jazyk

en

Originální abstrakt

Fracture behaviour and mechanical properties are the key features when a material for given application is supposed to be selected. Advanced glass ceramics composites are perspective structural materials for many applications due to their low production expenses and satisfactory properties even at elevated temperatures. Borosilicate glass matrix composite reinforced by alumina platelets was investigated to describe toughening mechanisms and their changes in a wide range of temperatures (from room temperature up to glassy transition temperature Tg). The dissipation of energy by bridging and/or deflection of propagating crack by alumina platelets uniformly dispersed in the glass matrix were the main toughening mechanisms observed. The alumina platelets have a higher ability to deflect propagating crack in comparison with spherical or rectangular particles having the same volume. Three and four point bend test for Youngs modulus and flexural strength determination was used. Fracture toughness determination was conducted using chevron notch technique. More than 100% increase of fracture toughness was observed when 30% of alumina platelets were added in to borosilicate matrix.

Anglický abstrakt

Fracture behaviour and mechanical properties are the key features when a material for given application is supposed to be selected. Advanced glass ceramics composites are perspective structural materials for many applications due to their low production expenses and satisfactory properties even at elevated temperatures. Borosilicate glass matrix composite reinforced by alumina platelets was investigated to describe toughening mechanisms and their changes in a wide range of temperatures (from room temperature up to glassy transition temperature Tg). The dissipation of energy by bridging and/or deflection of propagating crack by alumina platelets uniformly dispersed in the glass matrix were the main toughening mechanisms observed. The alumina platelets have a higher ability to deflect propagating crack in comparison with spherical or rectangular particles having the same volume. Three and four point bend test for Youngs modulus and flexural strength determination was used. Fracture toughness determination was conducted using chevron notch technique. More than 100% increase of fracture toughness was observed when 30% of alumina platelets were added in to borosilicate matrix.

BibTex


@article{BUT44816,
  author="Lukáš {Řehořek} and Zdeněk {Chlup} and Ivo {Dlouhý} and Aldo {Boccaccini}",
  title="Changes in Fracture Micromechanism with Increasing Reinforcement Volume Fraction in Glass Matrix Composite",
  annote="Fracture behaviour and mechanical properties are the key features when a material for
given application is supposed to be selected. Advanced glass ceramics composites are perspective
structural materials for many applications due to their low production expenses and satisfactory
properties even at elevated temperatures. Borosilicate glass matrix composite reinforced by alumina
platelets was investigated to describe toughening mechanisms and their changes in a wide range of
temperatures (from room temperature up to glassy transition temperature Tg). The dissipation of
energy by bridging and/or deflection of propagating crack by alumina platelets uniformly dispersed
in the glass matrix were the main toughening mechanisms observed. The alumina platelets have a
higher ability to deflect propagating crack in comparison with spherical or rectangular particles
having the same volume. Three and four point bend test for Youngs modulus and flexural strength
determination was used. Fracture toughness determination was conducted using chevron notch
technique. More than 100% increase of fracture toughness was observed when 30% of alumina
platelets were added in to borosilicate matrix.",
  chapter="44816",
  journal="Materials Science Forum",
  number="2008",
  volume="567-568",
  year="2007",
  month="december",
  pages="369--372",
  type="journal article - other"
}