Samarium Cobalt Magnets
Samarium Cobalt Magnets
Samarium Cobalt magnets (SmCo) belong to the rare earth magnet family and perform well at high temperatures. They feature low reversible temperature coefficients and resistance against demagnetization and corrosion.
Samarium cobalt is extremely brittle, necessitating special methods of machining to avoid heat fracture. Diamond grinding processes should always be conducted under coolant to avoid potentially heat fracturing the material.
Samarium Cobalt Magnet Uses School Home & Office
Samarium Cobalt (SmCo) magnets are rare-earth permanent magnetic materials. These magnets offer superior temperature ratings and resistance to demagnetization compared to Neodymium magnets, making them popular alternatives. Samarium Cobalt magnets are used in applications where precision control of magnetic field concentration is important, such as aircraft, marine or spacecraft applications where precise concentration control of its magnetic field must be ensured.
Samarium cobalt magnets are an increasingly popular choice among industrial designers and manufacturers for creating targeted magnetic fields. Like all rare earth magnets, this material comes in different shapes and sizes to best meet each application.
There are two primary categories of samarium cobalt magnet materials; those falling within series 1-5 range (energy product measured in mega gauss-oersteds (MGOe), with 15-24MGOe), and those within 2-17 type with higher maximum operating temperatures and increased maximum temperature capabilities. Both alloys consist of mixtures combining iron, cobalt, zirconium, hafnium as well as others such as zirconium. Since sintered magnet materials are designed primarily to possess magnetic characteristics rather than mechanical properties; you should expect some small cracks or porosity or voids within these sintered materials.
Samarium Cobalt Magnets in Industry
Standard and custom samarium cobalt magnets designed to withstand corrosion-prone and high temperature environments are available from this supplier. SmCo magnets can be found in generators, motor couplings, actuators, sensors and other industrial applications, but are more costly than NdFeB magnets due to better resistance against corrosion, demagnetization and higher working temperatures of 350 degrees C. Available as blocks, rings or discs they can also be cut to size to meet ITAR/DFARS compliance.
Samarium cobalt magnets are comprised of an alloy of 35% samarium and 60% cobalt, along with small amounts of iron, hafnium, praseodymium and zirconium. Although not as powerful as Neodymium Magnets (maximum energy product approximately 30 MGOe), Samarium Cobalt Magnets do possess three significant advantages over them - more resistance to corrosion, oxidation, demagnetization and heat shock; higher working temperature; higher working temperature and greater resistance; more fragile so requires storage at low humidity and mild temperatures so as not to chipping off pieces during use or storage conditions to avoid chipping brittleness brittleness brittleness is necessary preventing chipping off chips being chipping off during storage periods limiting chipping off.
Neodymium Magnet Shapes
Neodymium magnets come in an assortment of shapes and sizes. Some of the more versatile magnets include arc and mitres magnets as well as ring magnets; all offer specific magnetization direction options and may also come with either an axially or diametrically magnetized option.
Sintered and bonded neodymium magnets each possess different coercivities. Coercivity refers to how hard it is for a magnet to become demagnetized; its level depends upon how its magnetic material was manufactured - with sintering being the preferred process.
Magnets created through sintering use heat above their melting point to press and quench their material for compacting, which reduces oxygen formation risk while simultaneously improving performance at elevated temperatures.
Bonded magnets are held together with epoxy glue for increased strength and corrosion resistance, creating isotropic magnets with no preferred orientation that can be magnetized in any direction. Molded material then coated in plastic, nickel zinc or copper for further protection as per RoHS regulations when shipped via air transport.
Samarium Cobalt Magnets The 2nd Strongest in The World
Samarium cobalt magnets (SmCo) are among the more expensive rare earth magnets, yet provide excellent stability across a range of temperatures. Preferred by marine, aviation and space engineers for design applications that demand maximum strength but low demagnetization resistance, SmCo magnets have quickly become one of the preferred choices.
These alloys are formed by sintering Samarium (Sm) and Cobalt (Co) with various proportions of transition metals like iron (Fe), copper (Cu), hafnium (Hf) and zirconium (Zr). An anisotropic magnet, it has its preferred direction of magnetization but can also magnetize in different configurations.
Samarium cobalt magnets, like many Rare Earth magnets, are hard and brittle and must be handled carefully to prevent personal injury or material damage. Furthermore, pinching hazards should not be allowed between individual pieces as this could create dangerous pinch points that must not impact with each other or solid surfaces directly.
Where to Purchase Neodymium Magnets
Samarium cobalt magnets (SmCo magnets) are highly sought-after rare-earth magnet alloys due to their superior magnetic strength and temperature stability (they don't experience performance loss over the same temperature range as NdFeB magnets). Additional benefits include their outstanding reversible temperature coefficient, no protective coating requirement and low ignition point.
SmCo can be formed into various shapes and sizes by compressing. This technique utilizes a special type of samarium powder mixed with plastic carrier substance before being die-pressed and heated - this allows SmCo to be formed into complex parts with tight tolerances without manual machining being necessary.
Sintered samarium cobalt magnet materials are delicate, fragile and may easily break when handled improperly; you must take great care when handling or installing these magnets. Large or complex assemblies often undergo nickel plating prior to assembly for further durability and reliability.
Where to Purchase SMCO Magnets
Rare earth magnets are available at many companies that specialize in custom magnetic solutions, but not all manufacturers understand the challenges inherent to producing such complex alloys. If your potential supplier doesn't communicate these hurdles during quotation process, you could end up with an inferior product which won't fulfill its function effectively in your application.
SmCo magnets boast higher maximum operating temperatures than Alnico magnets and are less susceptible to corrosion, making them suitable for various shapes, sizes, and strengths. Based on your application needs, coatings or platings may be added for improved cleanliness for vacuum and medical uses or soldering onto printed circuit boards more efficiently.
Most commercial samarium cobalt magnets are anisotropic, meaning that they have one preferred direction of magnetization. This is caused by being sintered during a magnetic compaction process which applies an orientation field and therefore almost impossible to magnetize outside its preferred direction - something to take into consideration when designing systems and applications. Although usually unproblematic for most applications, an anisotropy issue should still be taken into consideration during system design.