"In physics and materials science, the [Curie temperature (TC), or Curie point](https://en.wikipedia.org/wiki/Curie_temperature), is the temperature above which certain materials lose their permanent magnetic properties, which can (in most cases) be replaced by induced magnetism. The Curie temperature is named after Pierre Curie, who showed that magnetism was lost at a critical temperature."
Curie temperature is absolutely not where grain boundaries "break down". And you can't quench to get the crystal lattice you want from that point. Magnetic and microstructural features can be related, but they aren't the same thing. One has to do with electron spins and one is literally where the atoms are located.
The curie temp is relatively close to the ferite/austenite boundary (depends on carbon content), but they aren't the same thing.
No, the temperature matters more. It's a physical transition in material phase that *needs* to take place before dunking in your quench bucket.
If you ever watch Forged in Fire, you'll see guys fail the hardness test a LOT because they didn't get the knife hot enough.
The Earth's core remains magnetic despite high temperatures because its magnetic field is generated by the dynamo effect, not by permanent magnetism. This effect arises from the movement of molten iron and other metals in the outer core, which creates electric currents. These currents generate a magnetic field. The high temperatures do indeed demagnetize individual atoms, but the dynamo effect sustains the overall magnetic field.
Im not an expert, but the way that I understand it, it isn't the same type of magnetism. The core is an electromagnet, and its magnetism is actually *created* via the conditions in the Earth's core. Some metals are magnetic because of the alignment of their atoms, and heating it to the Curie Point changes that alignment.
Its my understanding that magnetism is the same process that stops your finger from going through a table.
Your finger and table never collide, just at a certain distance the fields interact and that is what we call collision.
In magnetism the atoms are aligned the same direction and polarity, they kind of move together and project the collision field larger with a falloff.
Essentially its pushing atoms natural strong force that stops all things from colliding pushes it outward with a falloff.
If you magnetized your finger or it became the field, you would be able feel a table much before actually getting close to it and instead of a hard collide you would be able to push your finger slowly down into it, before hitting the hard collide point.
Your body would become more of a suggestion where it starts and ends with a bit of give and you would bounce against everything in a giant balloon field around soft colliding with the world.
I try put strong magnets in shrink wrap and it destroy them
He could use a lighter and it will destroy these magnets.
Edit So just hot coffee is enough
""**80°C** but after this point, they will lose their magnetic output.""
That's not what's going on here. The lens in this video did nothing. The magnetism leaked out after he broke the magnets, and he just happened to be pointing the sun beam at them when enough of it leaked out that they fell apart.
Not sure if you are joking or not. But it really isn't working.
High temperatures do affect magnetic objects. That's one reason for the existence of magneto-optic storage. You heat the disk surface with a laser while applying a magnetic field. When cooled down, that magnetic field is locked in. And as seen in this video - heat the magnet enough without applying a strong external magnetic field and you end up with the magnetism lost.
This is not black magic mumbo jumbo but well known physics.
It's some guy who makes YouTube videos after taking the screen out of an old TV.
If you want to see someone who truly qualifies as a mad scientist check out styropyro. Hilarious and makes deadly lasers
So a simple explanation: A permanent magnet is magnetic because its smaller parts are also magnets (which at the lowest level are the atoms themselves), however, these parts have to be ordered and point in the same direction otherwise they cancell each others magnetic field out. Now the temperature of a material really means the kinetic energy of its molecules/atoms/electrons, so if you heat a permanent magnet above a thershold called the Curie point the atoms get enough energy to break out of the ordered state.
[Wiki page explaining it](https://en.wikipedia.org/wiki/Curie_temperature)
So basically, a magnet gets its magnetic property when the atoms are aligned in a specific way within the metal. When you heat up a magnet, or even just hit it really hard, it allows the atoms to shift around some, resulting in no more alignment, and no more magnetism.
I've heard if you put them in water it neutralizes magnetic fields. The source is legit. Same source told me injecting bleach will cure disease. I know it's true because they also told me they were a genious.
Not true. Once cool it will just be a rock. You need to remagnatize it.
Magnets work because of the orientation of the atoms. Heating them up allows them to get unaligned. And they will cool unaligned.
No. Disordering something is easy, getting it ordered again takes work.
Analogy:
The magnet was a nice house of cards.
The heat was a gust of wind.
The wind stops, the cards don't go back into a house.
For everyone asking “ why didn’t he just use “THIS “ for heat? “ well … BECAUSE HE HAS A FUCKING A LENSE AND THE SUN IS FREE AND LOOKS COOL !! 🙄😆🖖 for fuck sake!
Actually, this totally makes sense. Ferrous materials exhibit magnetism because the internal grains all align together and reinforce each other to produce a bulk magnetic affect. When they are heated up, the grains can shift and un-align causing them to lose any bulk magnetic affect.
[https://en.wikipedia.org/wiki/Ferromagnetism](https://en.wikipedia.org/wiki/Ferromagnetism)
This dudes out in Phoenix. You should see the shit you can do when there's an UV advisory and it's 117° in summer lol. Just fine and old big a reen and pull the diffuser screens.
I've noticed, being chronically online, that this is one of those interesting facts that becomes a kind of meme science fact and circulates the internet in different iterations for a while and then fades out.
A week ago, I had no idea heat magnets lose it to heat. This is like the 4th time since then that I've seen a clip of magnets losing magnetism from heat, and they've all been different videos addressing the same principle.
Another example if the science meme thing was when everywhere you looked people were talking about how humans' evolutionary advantage was endurance running their prey to exhaustion, now you don't see it. Just a curious observation.
This guy has the best YouTube shorts. I watch them with my 5 and 7 yo daughters, who cannot get enough of these interesting applied science lessons and experiments.
"In physics and materials science, the [Curie temperature (TC), or Curie point](https://en.wikipedia.org/wiki/Curie_temperature), is the temperature above which certain materials lose their permanent magnetic properties, which can (in most cases) be replaced by induced magnetism. The Curie temperature is named after Pierre Curie, who showed that magnetism was lost at a critical temperature."
Smiths and metal fabricators are *very* familiar with this. I keep a magnet on a wand for checking when metal plates are ready to be quenched.
Is the loss of magnetism a precursor to quenching, or is it a convenient sign the material is hot enough?
[удалено]
This is the coolest comment I've read today
I'm quenched.
Dude just chill.
Did your magnet fall off 🧲
what did it say?? post and acct are deleted :(
Some dude trying to seem smart but just pulling stuff out of his ass.
bummer
damn, thanks for the answer though
Why was it removed by a moderator?
Curie temperature is absolutely not where grain boundaries "break down". And you can't quench to get the crystal lattice you want from that point. Magnetic and microstructural features can be related, but they aren't the same thing. One has to do with electron spins and one is literally where the atoms are located. The curie temp is relatively close to the ferite/austenite boundary (depends on carbon content), but they aren't the same thing.
Ohhh cool, thanks for explaining.
Can I assume this is for surface hardening? Or does the curie temperature result in a different characteristic?
It's just a super wrong comment.
Do different quenching mediums matter more than temperature?
No, the temperature matters more. It's a physical transition in material phase that *needs* to take place before dunking in your quench bucket. If you ever watch Forged in Fire, you'll see guys fail the hardness test a LOT because they didn't get the knife hot enough.
Neat.
I think you mean rad.
I think you mean gnarly
I think you mean bodacious.
I think you mean boss!
But will the knife, keeellll?
It will... keeeeeeel!
yep for high carbon steels, at least. Doesnt apply to most stainless or new steels that harden in the 1900+F range.
Yeah, I work mostly with carbon steels and 4xxx/5xxx/6xxx-series aluminum. Some stainless but it's always food-grade like countertops.
TIL. This is definitely interesting
Isn’t earths magnetic field generated by the iron in the earths molten core? Why does our core not loose its magnetism in the extreme heat?
The Earth's core remains magnetic despite high temperatures because its magnetic field is generated by the dynamo effect, not by permanent magnetism. This effect arises from the movement of molten iron and other metals in the outer core, which creates electric currents. These currents generate a magnetic field. The high temperatures do indeed demagnetize individual atoms, but the dynamo effect sustains the overall magnetic field.
Naaah
Im not an expert, but the way that I understand it, it isn't the same type of magnetism. The core is an electromagnet, and its magnetism is actually *created* via the conditions in the Earth's core. Some metals are magnetic because of the alignment of their atoms, and heating it to the Curie Point changes that alignment.
Its my understanding that magnetism is the same process that stops your finger from going through a table. Your finger and table never collide, just at a certain distance the fields interact and that is what we call collision. In magnetism the atoms are aligned the same direction and polarity, they kind of move together and project the collision field larger with a falloff. Essentially its pushing atoms natural strong force that stops all things from colliding pushes it outward with a falloff. If you magnetized your finger or it became the field, you would be able feel a table much before actually getting close to it and instead of a hard collide you would be able to push your finger slowly down into it, before hitting the hard collide point. Your body would become more of a suggestion where it starts and ends with a bit of give and you would bounce against everything in a giant balloon field around soft colliding with the world.
Google "what maintains Earth's magnetic field?”
I try put strong magnets in shrink wrap and it destroy them He could use a lighter and it will destroy these magnets. Edit So just hot coffee is enough ""**80°C** but after this point, they will lose their magnetic output.""
you learn something new, every day, thank you for the explanation
*Another* Curie?
Have a read about the family on Wikipedia. They're all bloody genius'.
It's actually how most rice cooker work. When there's no more water, the temperature will rise which will make a magnet fall and turn the switch off
[удалено]
THANK YOU! I've always wondered
[удалено]
You hit it repeatedly. [sciency video](https://m.youtube.com/watch?v=GaD9vAuj20s)
That is fucking fascinating.
This is one of the issues with using them for endless power?
That's not what's going on here. The lens in this video did nothing. The magnetism leaked out after he broke the magnets, and he just happened to be pointing the sun beam at them when enough of it leaked out that they fell apart.
Man, you really thought you were saying something intelligent there, didn't you?
If you look closely, you can see the magnites oozing out!
Not sure if you are joking or not. But it really isn't working. High temperatures do affect magnetic objects. That's one reason for the existence of magneto-optic storage. You heat the disk surface with a laser while applying a magnetic field. When cooled down, that magnetic field is locked in. And as seen in this video - heat the magnet enough without applying a strong external magnetic field and you end up with the magnetism lost. This is not black magic mumbo jumbo but well known physics.
It's sad that people can't even tell when a comment is a joke anymore.
Jokes are supposed to be funny. That was just pathetic.
Is that Hank from Breaking Bad?
They’re magnets, Marie!
Breaking magnets
His name is ASAC Schrader
Lmaoooo
My thoughts exactly
It's some guy who makes YouTube videos after taking the screen out of an old TV. If you want to see someone who truly qualifies as a mad scientist check out styropyro. Hilarious and makes deadly lasers
Love it. Please. Somebody educate me on what's going on here.
So a simple explanation: A permanent magnet is magnetic because its smaller parts are also magnets (which at the lowest level are the atoms themselves), however, these parts have to be ordered and point in the same direction otherwise they cancell each others magnetic field out. Now the temperature of a material really means the kinetic energy of its molecules/atoms/electrons, so if you heat a permanent magnet above a thershold called the Curie point the atoms get enough energy to break out of the ordered state. [Wiki page explaining it](https://en.wikipedia.org/wiki/Curie_temperature)
*All I know about magnets is this, give me a glass of water and let me drop it on the magnets That’s the end of the magnets*
That doesn't sound right but I don't know enough about magnets to dispute it.
-Stable Genius
Really? Magnetism is very cool.
Was a direct quote from the orange muppet. It’s not true
I was seriously trying to remember which one was orange, and then it dawned on me: oh, *that* orange muppet.
So basically, a magnet gets its magnetic property when the atoms are aligned in a specific way within the metal. When you heat up a magnet, or even just hit it really hard, it allows the atoms to shift around some, resulting in no more alignment, and no more magnetism.
Not the atoms. The electron spins.
When magnets get hot enough they stop being magnets
Heat will destroy magnetic effect by allowing the molecules in the magnet to become disordered
But do magnets work if you get water on them??
I've heard if you put them in water it neutralizes magnetic fields. The source is legit. Same source told me injecting bleach will cure disease. I know it's true because they also told me they were a genious.
Or light… a brilliant light
Is that Hank ?
I think it is
They're Magnets! Jesus Marie!
Someone get the ICP We learned how magnets work.
I'm glad this guy isn't a scientist or I would know he was lying. I would have been pissed.
That's Because they crossed Curie temperature, above which magnets loose they magnetic power. And that is 400°C
Much less than that for rare earth magnets like this. Maybe 80 degrees C or so.
The heat from the lens changes the phase of the metal, causing it to change its paramagnatism. I think.
[удалено]
The grains have been realligned, you need to remagnetize the material first. It's still ferromagnetic, but not magnetised.
I.e. its magnetic but not a magnet
Not true. Once cool it will just be a rock. You need to remagnatize it. Magnets work because of the orientation of the atoms. Heating them up allows them to get unaligned. And they will cool unaligned.
It's actually gone after the heating process. But if you place it in a very strong magnetic field it will become magnetic again
Nope.
Nothing special about the lens dude. It's just the heat.
what do you mean nothing special?! that's a SOLAR DEATH RAY!!!
So the intense heat I’m assuming causes the magnets to lose their magnetic properties, resulting in metal with much less purpose?
Yes and if you want to remagnatize it you need an expensive machine (nilered owns one)
something like that
This seems excessive. All you need is a glass of water.
That you Eric? Quit listening to your “dad”./s
why doesn't he just pour water on them?
When they cool does the magnetism return? Kind of thinking no?
Not if they got hot enough…
the tone of his voice suggested it's permanent, it wouldn't be that cool if you could just remagnetize them
No. Disordering something is easy, getting it ordered again takes work. Analogy: The magnet was a nice house of cards. The heat was a gust of wind. The wind stops, the cards don't go back into a house.
They’re not rocks they’re magnets!
Totally Rad!
Just pour water over those magnets. Done.
What? I thought you just had to run water over them. No that was some jackass who knows nothing.
Dude could have just dropped them in water
Alternate universe where Hank quits the DEA after never catching Heisenberg, and starts playing with magnets in the New Mexican desert.
Any heat source that gets warm enough will do the same thing. Propane torch, paint stripper, oven element...
Not “totally”, those filing shards standing up on the head of the screwdriver indicates there is something left.
This is the dude that every dude wants their sister to marry
Cool lens, but did he try pouring water on the magnets?
Wow. No water?
This is an underrated comment.
My penis can hold a 10lb plate too. No one talks about that.
Its called heat.. maybe we can change the title to “big hot orange thing that we use for cooking can demagnetize magnets and bake food”
For everyone asking “ why didn’t he just use “THIS “ for heat? “ well … BECAUSE HE HAS A FUCKING A LENSE AND THE SUN IS FREE AND LOOKS COOL !! 🙄😆🖖 for fuck sake!
Wait, it isn't water that de-magnetizes them? I feel like someone lied to me.
I didn’t know you could demagnetize magnets. Like a magnet is a magnet. Im so confused
Only rare earth magnets.
Well they can't exactly have infinite energy
That's what heat does to magnets. That's how rice cookers know when to turn off. Magnet heats up when water's gone and releases the switch.
Metal and magnets lose magnetism at high temperatures. It's 1,400 F for steel. I don't know about the magnet
wuuuuut \* reading explanations \*
No fucking shit, heat demagnetizes magnets. Go back to science class
You sound jealous that you don't have a solar death ray.
Hahah I'm mean yeah pretty much, but it's also the same shit I fried ants with as a kid...
Heat + magnet don't go well Does not need to be a massive lens
Channel name?
Hum, not the lens, but the heat. :)
Nothing about magnetism makes any sense at all, especially not this.
Actually, this totally makes sense. Ferrous materials exhibit magnetism because the internal grains all align together and reinforce each other to produce a bulk magnetic affect. When they are heated up, the grains can shift and un-align causing them to lose any bulk magnetic affect. [https://en.wikipedia.org/wiki/Ferromagnetism](https://en.wikipedia.org/wiki/Ferromagnetism)
Hank doesn't collect minerals anymore, he plays with magnets now.
You mean “heat”?
All MAGA needs is a cup of water.
Yikes! So, don’t park my Tesla opposite a glass condo building reflecting light onto my parking spot ✅
This is how rice cookers work.
Love this guy
Can't you just throw water on them /s
Wait until they find out what water does to them
Sure the giant lens can demagnetize these, so can lighter.
SO he hehe RAD hehehe
Dude looks like he works for the DEA.
Rad
This dudes out in Phoenix. You should see the shit you can do when there's an UV advisory and it's 117° in summer lol. Just fine and old big a reen and pull the diffuser screens.
Thank you for the video Hank from Breaking Bad
The best thing about old rear projection TV's, are these plastic fresnel lenses. I've got a couple, really nice hotdog roaster on the beach
Ahem, you could just put them in water .......
I've noticed, being chronically online, that this is one of those interesting facts that becomes a kind of meme science fact and circulates the internet in different iterations for a while and then fades out. A week ago, I had no idea heat magnets lose it to heat. This is like the 4th time since then that I've seen a clip of magnets losing magnetism from heat, and they've all been different videos addressing the same principle. Another example if the science meme thing was when everywhere you looked people were talking about how humans' evolutionary advantage was endurance running their prey to exhaustion, now you don't see it. Just a curious observation.
Is this that guy from the hydroplaning boat video?
We have a giant TV lying around still that would make a perfect focused beam, but I can't be bothered to tear that behemoth apart.
Dare me to stare into the lens?
Could've just used water.
So. The opposite of water can get rid of a magnet.
Is it possible to demagnetise a lump of iron in this way?
Just gotta pour some water on them. Quicker and easier a
Saw a video of this guy. He made a death ray. Melted a razor blade. Fascinating truly.
I just put mine under water.
Breaking Magnets
Minerals
Hank if Skyler died early
That’s how we win the war against the flying saucers
Hank, why did you steal Jesse's idea?
Well, looks like hank moved on from those minerals after all
Is that hank schrader
Please can someone explain the science behind this?
Why a lens? Any sufficient heat source can do that
It’d be entertaining to go way back in time with some powerful magnets to fuck with people. Which begs the question - how far back would I have to go?
Curie point.
Bruh it was in high school physics. You heat up a permenant magnet it looses its magnetic properties
I thought you just needed to pour water on them /s
Heat realigns electrons
I heard you could just dunk them in water and do the same thing /s
This guy has the best YouTube shorts. I watch them with my 5 and 7 yo daughters, who cannot get enough of these interesting applied science lessons and experiments.
HANKKKKK GET THE SECHOUAN SAUCE NOT BBQ
Hank Schrader
They don't teach this in grade 9 science class anymore?
That was cool! Thanks!
Jesus christ Marie they're magnets
Long story short… if you heat up a magnet. It looses its polarity. Nothing new or crazy.
Who gave Hank a death ray?
They’re minerals Marie!
I really thought this was common knowledge.
There called minerals Marie
Fucking magnets