Damage-Tolerant Glass

  • Author: ChemistryViews
  • Published: 10 January 2011
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Nature Materials/Nature Publishing Group
thumbnail image: Damage-Tolerant Glass

The terms 'strength' and 'toughness' are often used interchangeably in everyday life, but in terms of materials, they relate to specific properties. Glass, for example, is strong — scratch-resistant and difficult to permanently bend out of shape — but brittle. Metals, on the other hand, are tough or difficult to shatter — but are generally malleable. Development of a material with both strength and toughness has remained a challenge.

Marios Demetriou, Caltech, USA, and colleagues have developed an alloy of palladium and silver that has a fracture toughness comparable to those of the toughest materials known. The alloy demonstrated the unusual capacity for shielding an opening crack through extensive shear-band sliding processes: The high number of bands in the new alloy formed networks which clustered around the crack tips, blocking them from growing.

Due to the high cost of palladium, the material will be suitable for dental and medical implants. A cheaper version based on copper, iron or aluminium, is being developed for large-scale engineering applications.

Article Views: 6059

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH