I had lost hope with my electric cooking plates. The white circles where completely hidden under a layer of diamond-grade burn residue that no amount of scrubbing with chemicals could even begin to remove. I found this 3€ scrapping tool and it’s amazing !!! Sorry, but I don’t have the before picture, believe me after 6 years of usage, it was bad.
I’m, I need to correct misinfo here. Induction stove tops are commonly a specific amorphous phase of pokycrystaline glass ceramic compound, which may include aluminum oxide, but is not only Al-Ox. As you sound like you are aware, mild changes to compounds can dramatically alter properties like hardness and plasticity.
With that being said I can’t actually find any verifiable information about the exact compound or additives or hardness. And my point isn’t necessarily that you’re super wrong, it’s just that the hardness may be higher than aluminum oxide alone.
I looked a bit more into it and the first spec I found had a knoop hardness of 600 which should be mohs 6-7 so hardened steel should be able to scratch it.
Is mnoop hardness a special hardness scale for gemstones or something? Never heard of that before. I’m not an actual mechanical engineer though, just a dropout lmao
I read that its used to measure the hardness of brittle materials, but I could be wrong.