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The Achilles’ heel of ceramics is?
Surface Cracks
Ceramics can be made cheaply because what are the most abondent elements in the earth’s crust?
oxygen, silicon and aluminum
Using cross polarizers allows us to show what at the tip of a crack?
Stress concentration
How can we strengthen ceramics?
Eliminate the cracks, or stop them from growing
Match the mechanism with the process:
1. Close surface cracks
2. Eliminate surface cracks
3. Limit surface cracks motion
1. Implant large atoms in surface
2. Flame polish a glass to remelt the surface to heal cracks
3. Make crystals smaller
T/F - The high strength of Corning Ware® is due to the larger crystals.
True
False
False
T/F - In Vision Ware® the crystals are even smaller than those in Corning Ware®.
True
False
True
T/F - Divitrification eliminates transparency in materials
True
False
True
T/F - Divitrification makes the material smaller
True
False
True
Author
topher.mair
ID
21430
Card Set
Material Science
Description
Material Science Final
Updated
2010-05-31T20:08:53Z
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