How can ceramic be both a non stick material and really good friction material? (kbin.earth)
from strawberry@kbin.earth to nostupidquestions@lemmy.world on 11 Sep 20:58
https://kbin.earth/m/nostupidquestions@lemmy.world/t/322334

Ceramic coating a car makes water bead right off, but the best brake pads and clutches are also ceramic (aside from carbon ceramic and carbon carbon)

Answered: basically ceramic is a wide range of materials with vastly different properties

#nostupidquestions

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xmunk@sh.itjust.works on 11 Sep 21:05 next collapse

Because ceramic is an extremely vague term - as a parallel you can look at carbon which can be crumbly and a good fuel, one of the hardest materials on earth or a variety of other forms.

strawberry@kbin.earth on 11 Sep 21:35 collapse

guess so, i thought ceramic would just be one thing but yeah that makes sense

EveryMuffinIsNowEncrypted@lemmy.blahaj.zone on 11 Sep 21:06 next collapse

Well, the bottoms of cleets are friction-inducing surfaces, but unless you pour a LOT of soda onto them, they ain’t gonna be sticky.

It’s as simple as that.

nandeEbisu@lemmy.world on 11 Sep 21:27 next collapse

Quoting Wikipedia in reference to the variance in ceramics for the degree of crystallinity and number of electrons in their iconic and covalent bonds:

With such a large range of possible options for the composition/structure of a ceramic (nearly all of the elements, nearly all types of bonding, and all levels of crystallinity), the breadth of the subject is vast, and identifiable attributes (hardness, toughness, electrical conductivity) are difficult to specify for the group as a whole

dual_sport_dork@lemmy.world on 11 Sep 21:35 next collapse

Ceramics are a broad class of materials with a wide spectrum of properties. There is no one singular material called “ceramic.” Ceramic materials can be made smooth and slippery or textured and grippy, and everywhere in between.

xmunk@sh.itjust.works on 11 Sep 21:38 collapse

Included in that range are both terracotta and bone China which are radically different materials.

lunarul@lemmy.world on 12 Sep 02:23 next collapse

To put it simple: fine china is ceramic, but so are bricks.

finitebanjo@lemmy.world on 12 Sep 10:40 collapse

Ceramic comes from the word Keramic which means relating to Pottery.

If you mix sediments with moisture and fire it in an oven, it is ceramic. Difference of materials means different properties. Some materials crystalize, some burn, or some polish smooth easily.