this post was submitted on 03 Oct 2024
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Hey they're not lying, it definitely looks sharp

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[–] Aeri@lemmy.world 4 points 22 hours ago (1 children)

They said it was sharp, not uh, the opposite of brittle

[–] Technus@lemmy.zip 2 points 4 hours ago

the opposite of brittle

I think that would be "tough", which has a mathematical definition in materials science: https://en.wikipedia.org/wiki/Toughness?wprov=sfla1

[–] Hupf 10 points 1 day ago
[–] OhVenus_Baby@lemmy.ml 5 points 1 day ago (1 children)

You actually can sharpen ceramic blades but its a pain and their super brittle. But for cutting light tasks their far far superior. I've used many of them.

[–] SkaveRat@discuss.tchncs.de 4 points 20 hours ago
[–] Mr_Blott@feddit.uk 82 points 2 days ago (1 children)

I bought a set of "metal drill bits" really cheap. First time I tried to drill metal they just melted

But I couldn't argue with the fact that they were indeed, metal drill bits. Just not drill bits for metal

[–] SkaveRat@discuss.tchncs.de 1 points 20 hours ago

I know someone who bought a cheap drill bit, and on first use, the twist got straightened out

It's as if they didn't harden it

[–] FartsWithAnAccent@fedia.io 45 points 2 days ago (1 children)

"May your blade chip and shatter."

[–] xpinchx@lemmy.world 33 points 2 days ago (1 children)

"May thy knife chip and shatter" 👴

[–] FartsWithAnAccent@fedia.io 6 points 2 days ago (1 children)
[–] ChilledPeppers@lemmy.world 5 points 2 days ago

"Woman screaming, epic ambiance music"

[–] HEXN3T@lemmy.blahaj.zone 28 points 2 days ago

It's true. It's sharp. However, that doesn't mean it isn't brittle.

[–] ZILtoid1991@lemmy.world 34 points 2 days ago (1 children)

Yeah, ceramic knives are like that. They get duller with time however.

[–] ramble81@lemm.ee 31 points 2 days ago (3 children)

I don’t think there’s a blade that doesn’t get duller with time, is there?

[–] ZILtoid1991@lemmy.world 36 points 2 days ago (2 children)

Ceramic is less prone to get dull, but it still not a 100% solution, and once you go dull you never go back. Sometimes it even chips.

[–] TexasDrunk@lemmy.world 13 points 2 days ago (1 children)

I had some years ago. They ended up chipped as hell. That's when I bought some halfway decent (not good, just not Target grade) steel ones that aren't stainless. I hone the ones I use most a couple of times a week and the rest of them on an as needed basis. I sharpen them as needed.

If your schedule and executive fiction allow for it then I highly recommend it. Ceramic is sharp as fuck, but not enough sharper to deal with buying a new one every time it chips.

[–] princessnorah@lemmy.blahaj.zone 3 points 1 day ago (1 children)

Ceramic knives are kinda stupid yeah. But a ceramic "steel" to hone your metal knives works amazingly. And those don't chip, because they're round. They can shatter though.

[–] TexasDrunk@lemmy.world 2 points 1 day ago

Yeah, I bet a ceramic honing rod is pretty great. I've seen them as a part of some of the better knife sharpening sets.

[–] HonkTonkWoman@lemm.ee 1 points 1 day ago

So could you smash car windows with these bits? Are they like the snake bite things made out of smashed up spark plugs?

Just curious if it’s the same type/grade of ceramic, or if this stuff would just continue to shatter/bounce off.

And no, I’m not planning on smashing up at knives at Target in order to rob the cars in the parking lot.

Go do that at Home Depot after you smash up a few display toilets.

[–] criticon@lemmy.ca 19 points 2 days ago (1 children)

Yes, but these can't be resharpened

[–] weeeeum@lemmy.world 0 points 2 days ago* (last edited 2 days ago)

Technically diamond? But cutting bits are only large as like 2mm, and are very expensive. Diamond also can't support a very steep cutting edge, so you will be limited by possible edge geometry. Used for machining highly reflective, perfect, mirror finishes on parts.

TLDR you're right

[–] wander1236@sh.itjust.works 22 points 2 days ago

So sharp it cut itself