(ORDO NEWS) — The AlumiTube channel decided to test whether neodymium magnetic “shower” balls made of red-hot metal can withstand. Can they survive?
What is a neodymium magnet: properties and disadvantages
Neodymium magnets are one of the types of magnets that are characterized by very high power, as well as increased resistance to demagnetization. They appeared not so long ago – at the end of the twentieth century, and quickly became popular due to the high magnetic induction.
Even small neodymium magnets are able to provide a very high adhesive force. For example, such a magnet in the form of a cube with an edge of 10 centimeters will provide an adhesive force of 4.5-5 kg, which is a multiple of traditional magnets.
Where are neodymium magnets used? If a magnet is made of a rare earth alloy, boron and iron, then it has its very place in industry and in everyday life.
For example, due to the fact that neodymium magnets create a more powerful field than ordinary ferrite ones, and, as you already know, are more resistant to demagnetization, they are used for the production of generators, electronics: usually headphones, removable hard drives for PCs – magnetic resonance tomography and other special equipment.
Quite often, people who have not encountered this type of magnets, the question arises why they are needed in everyday life. And, we hasten to assure that in this area for them there are a lot of ways to use neodymium magnets:
– Search and recovery of metal objects: for example, if the key of the house or on the site is lost, or a metal bucket falls into a well, a neodymium magnet will solve such problems.
– Fixing objects when gluing: 2 magnets are attached from different sides and provide uniform and constant pressure, like a big press.
– Fixing metal objects in the kitchen or garage in case you still plan to do rearrangements or are used to doing them often.
– Fixing signs, plates, remote control from the navigator or radio and other similar items inside the car.
– Destruction of data on magnetic media: if you need to ensure that information is deleted from old cassettes or floppy disks, use a neodymium magnet.
– From two neodymium magnets you can make excellent latches for furniture and save yourself from having to screw in screws.
– Neodymium magnets will simplify the collection of light metal debris (for example, chips).
– And bonus: this is a great example for visually explaining the effects of a magnetic field to children.
And yet, neodymium magnets have certain disadvantages that make their operation very limited. Firstly, they are subject to corrosion, to prevent which they are coated with nickel, but this does not always work and not all magnets of this type go through this procedure.
Secondly: they cannot be heated, and the maximum allowable temperature for neodymium magnets depends on the brand: EH – up to 200 degrees, M – up to 100, N – up to 80.
Magnets of this type are very fragile, so you should avoid any mechanical impact: they are similar crystal vase by degree. Also, neodymium magnets can adversely affect the operation of electronics within a radius of a meter and a half.
How temperature affects a neodymium magnet
You already know that the comfortable temperature for a neodymium magnet, on average, should be less than 100 degrees Celsius, and that any impact on it will lead to loss of properties. But what if there is an opportunity to see what will happen to such a magnet if hot metal is poured on it?
Answers to several questions will be immediately given – and not in the theoretical description of the experiment, but in practice: will neodymium magnets affect the hot melt? And if so, how exactly will aluminum behave when it solidifies?
Fortunately for us and for you, the AlumiTube channel decided on this very dangerous experiment. The good news: no one was hurt, and the magnets themselves showed themselves in a very unexpected way. How was the experience of pouring neodymium magnets with red-hot metal, see the video below:
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