why are ceramics harder than metals

People also ask


  • Why does ceramic crack more easily than other materials?

  • Unlike in a metal, the atoms of the ceramic cannot move easily past one another. So instead of the material blunting the surface crack as occurs in metals, in a ceramic the stress from the crack ends up concentrated at the point of the crack.

  • Why are ceramics brittle?

  • So Why are Ceramics Brittle? Why can metals be scratched and develop cracks and yet not catastrophically fail? The reason is that metals can slide along slip planes to break the crack up.

  • Why can metals be scratched and develop cracks yet not fail?

  • Why can metals be scratched and develop cracks and yet not catastrophically fail? The reason is that metals can slide along slip planes to break the crack up.

  • Why does a crack in a metal become a void?

  • The reason is that metals can slide along slip planes to break the crack up. Take a look at the following video showing schematically how a crack in a metal becomes a blunted crack and a void, which can effectively stop the initial crack from growing and catastrophically failing (fracture).

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