Comment Re:Ion strengthened? (Score 1) 207
The processes described produces high compression strength. What about tensile strength? Portland cement concrete can be made to have tremendous compression strength but it's strength in tension is poor.
That's why a huge proportion of iphones I see have cracked screens - no one has figured out a cheap way to make really tough, thin glass with a high tensile strength. The weak corners and edges on iphones and the careless owners don't help. I wonder if we'll ever see a polymer-based material that has good enough scratch resistance and optical properties to be used for phone/tablet screens. That would be killer, though I'll take Gorilla Glass over portland cement for a screen any day.