News Materials Science Fracture Protection: Nanotubes toughen up ceramics Share this:FacebookTwitterPocketRedditPrintEmail By Jessica Gorman December 26, 2002 at 7:45 am This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe