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This sounds cool, but am I stupid for thinking that the whole point of ceramics is that they're already malleable? That's why we have ceramic crockery, etc..
by Mizza 4y ago
This sounds cool, but am I stupid for thinking that the whole point of ceramics is that they're already malleable? That's why we have ceramic crockery, etc..
- Demiurge 4y agoI think the problem being solved is that once you take a crock out of the kiln, you can’t reshape it.
- nominusllc 4y agoWell, not with the stipulation it stays in one piece, but that never stopped young-me from reconfiguring all manners of my mom's vases
- Mizza 4y agoI can see why that would be useful in some circumstances, but not the more common ones they describe. Why is it necessary that a ceramic heatsink for a phone be re-formed, rather than just cast in the correct shape to begin with?
- ccvannorman 4y agoI'm not sure, but here's what might be the case: If you have a phone made of today's ceramics and drop in on concrete, and it cannot be deformed, it will shatter. Since this new material can be malleable, when you drop your phone, it doesn't shatter.
- Mizza 4y agoThat would be handy, but that's not the case here since it only deforms under high heat/pressure, not in normal room temperature conditions.
- quells 4y agoIt’s incredibly difficult to form conventional ceramics into “the correct shape to begin with” with even millimeter tolerances because it shrinks twice during production. First when the liquid from the slurry/clay evaporates, and again when the particles sinter together during firing in the kiln. Both of these are non-linear and can cause warping with complex geometries. EDIT: binders also typically burn off during firing, which further complicates changing shape during firing.
- hinkley 4y agoIt’s kind of amazing that you can get a ceramic container where the lid fits snuggly. Some of that comes from modifying the greenware (dried but unfired clay) but I think most of it is exacting tolerances for inputs and processing. Clay from this one quarry. This much water. These building temperatures and humidity. This exact furnace temperature and time.
- ruste 4y agoThe only way I've seen this done is by lapping the touching surfaces after firing.
- amluto 4y agoOne can fire a pot with the lid on it in the kiln. They tend to deform together. Of course, this requires that the mating surfaces not fuse together and may also produce a non-rotationally-symmetric interface.
- hinkley 4y agoI feel like I've watched videos where people make Japanese and/or Korean ceramic cook pots and I can't for the life of me remember how they kept them from warping, just that they do. The only trick I do remember is don't glaze the contact point between the two pieces. That not only adds thickness variability, but if glaze touches the bottom of the kiln you fuse to the bricks, so you have to elevate anything glazed, and elevating increases warping.
- hinkley 4y agoAn oven doesn’t reach 300°C, blacksmiths work metal above 800°C, when it becomes ductile. Most of us don’t seem to have problems with that notion, except when discussing 9/11 that is. If your computer is hitting oven temperatures you have a very big problem.