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"Ceramics are extremely hard and tolerant of great heat (the latter not being particularly relevant)" But very rarely are they not brittle upon impact. This i
by DannyBee 10y ago
"Ceramics are extremely hard and tolerant of great heat (the latter not being particularly relevant)"
But very rarely are they not brittle upon impact.
This is why you don't see ceramic saw blades - carbide, even though brittle, is much less brittle than ceramics.
(this is also why they don't use diamond saw blades except for abrasive cutting - the diamonds we make are too brittle to be used to cut wood).
- mrob 10y ago>carbide, even though brittle, is much less brittle than ceramics To clarify, "carbide" here is short for "cemented carbide", i.e. ceramic carbide particles sintered together in a metal binder. It's tougher than the pure ceramic although still somewhat brittle. https://en.wikipedia.org/wiki/Cemented_carbide https://en.wikipedia.org/wiki/Cemented_carbide
- DannyBee 10y agoYes. They rely on the metal binder to provide some help here. But ceramic still wouldn't work. (at least what we are talking about here. In theory, cemented carbide can be a ceramic, depending on the exact terminology used).