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Neodymium NdFeB rare earth magnets are sintered by powder metallurgy with chemical composition of Nd, Fe, B and other minor elements.
Neodymium Iron Boron (NdFeB) magnets are composed of Nd, Fe, B, Dy, Co and other minor elements. NdFeB neodymium magnets are the rare earth magnet with the highest magnetic performance and coercive force in the world.
Production Process of Rare Earth Neodymium Magnets
1. Vacuum Melting
Compositions of neodymium, iron , iron-boron, dysprosium and minor additions including cobalt , copper , gallium, aluminum and others are mixed and induce-melted to form Nd2Fe14B phase and other necessary structures required for high performance permanent magnets. The melting temperature reaches over 1300o C. Usually repeated melting is needed to be produce an even phase and structure distribution .
2. Crushing
The ingots from vacuum melting process are crushed into coarse powder directly , or strip cast followed by HDDR processing into coarse powder .
3. Jet Milling
The coarse powder further milled into required particles sized about 3 microns in diameter by a jet miller . Those particles become single-domain and anisotropic which are critical for producing a high coercivity magnet. Jet milling is the most effective way to mill the particles so far.
4. Pressing
Compact the fined powder to re-produces block magnets. Usually a magnetic field is applied during pressing to align those anisotropic particles in order to produces maximum magnetic output in particular direction. There are two pressing methods, transverse and axial , depend on different application. Isostatic pressing is normally used to further densify magnets to 75-80% .
5. Vacuum Sintering
The compacted magnets are sintered ate temperature above 1000 o C and for many hours to be solidifiedand compacted further more up to 99% by shrinking its body. A required microstructure between particles for high performance permanent magnets is also formed in this stage. Some following heat-treatments are needed to stabilize the magnets .
6. Machining
Shrinkage and distortion during sintering is too difficult to control adequately and magnets normally need at least a " clean up" grind on the surface. Small parts are cut or sliced precisely forma big block to meet the demanding tolerances and different shapes .
7. Surface Treatment
Various surface treatments can be applied on the final products . They include zinc, nickel ,Ni-Cu-Ni multi-layer, e-coating , epoxy and others. They provide different surface finishing, appearance and corrosion resistance, applicable in different application environments.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoNeodymium magnets are made from an alloy of neodymium, iron, and boron.
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What type of magnet do you need to test for real gold?
You can use neodymium magnet (also known as NdFeB, NIB, or Neo magnet) which is the most widely-used type of rare -earth magnet, is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure.
What is neodymium?
Some applications of neodymium are:- the most important use of neodymium is in strong magnets as Nd2Fe14B- neodymium lasers are also common- neodymium is used as coloring additive for glass
does magnet sink or float?
Although it does not appear to be magnetic, water, like all matter, may display magnetic characteristics when exposed to a large enough magnetic field. A extremely powerful magnet repels water by a little amount. You may do this yourself if you have a neodymium magnet.
What are some other names for a neodymium magnet?
Some other names include NdFeB, Neo, or Nib. This is also known as a rare-earth magnet and they have the potential to store large amounts of magnetic energy. Several different websites sell these - one is Applied Magnets.
What magnet does a magnetic strip use?
To remain a magnet it has to be made out of steel as steel makes a permanent magnet.
What type of magnet do you need to test for real gold?
You can use neodymium magnet (also known as NdFeB, NIB, or Neo magnet) which is the most widely-used type of rare -earth magnet, is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure.
What is the permanent magnet?
neodymium-iron-boron
How much does a neodymium magnet weigh?
2 pounds
What magnets act like several combined bar magnets?
A "Neodymium magnet or Super Magnet".
What is in magnets?
There are three elements in a magnet: iron, boron, and neodymium.
What kind of magnet acts like several combined bar magnets?
A "Neodymium magnet." It is more commonly known as a "Super magnet."
Where do you buy a neodymium magnet?
Try ThinkGeek.com" http://www.thinkgeek.com/brain/whereisit.cgi?t=neodymium&x=0&y=0
What a magnet does?
A magnet attracts other metal objects to it. This is done by combining the following materials: iron, boron, and neodymium. These materials make a magnet, and a magnet can also be made by rapping a copper wire around iron and running electricity through it, making an electromagnet.
What is the strongest magnet in the world?
The Neodymium Magnet is the strongest permanent magnet in the world. If you have two over a few centimeters they could cause a serious injury.
What metal is used to make a super magnet?
Neodymium, alloyed with iron and boron.
What is the strongest magnet and where do you get it?
Neodymium magnets can be quite strong. Many supply shops can get you some.
What do a magnets do?
A magnet attracts other metal objects to it. This is done by combining the following materials: iron, boron, and neodymium. These materials make a magnet, and a magnet can also be made by rapping a copper wire around iron and running electricity through it, making an electromagnet.
