SmCo VS NdFeB Permanent Magnets 20170222

SmCo VS NdFeB Permanent Magnets 20170222
SmCo Magnets and NdFeB Magnets for Brushless DC Motor in Vacuum

Look for SmCo & NdFeB Magnets  in Brushless DC Motor: 
I am busy designing a brushless DC motor to be used in a vacuum environment.
Do you know if the bonding material (if any) in your Samarium Cobalt and Neodymium permanent magnets will outgas in vacuum?
I do not have the final size yet, but it will be in the region of *** mm.
My maximum working temperature is below 100°C.
From what I heard the neodymium magnets do not hold up well in vacuum due to its bonding material that "dissolves" in vacuum.
I think the  SmCo magnets  are normally used for vacuum, but wanted to confirm it with you.
Is there a specific magnet type that you would recommend I use?

NdFeB Permanent Magnet Manufacturer China Rare Earth Magnet Limited:
Is you required a shape of rectangle?
Normally, the magnets used in motors are in arc shape.
Many customers use neodymium magnets in motors.
Bonded NdFeB magnets are produced by single-time molding of the mixture of quick-quenched NdFeB powder and bonding agent.
At present, the manufacture process of bonded NdFeB includes "compression molding" and "injection molding".
Compressed bonded NdFeB is made of magnet powder and thermosetting resin (epoxy resin).
Injected bonded NdFeB is made of magnet powder and thermoplastic resin (PA, PPS .etc).
As a whole, it should not dissolve in vacuum (below 100°C)

Requirements to the Magnets Used in Space: 
The magnets will be in an arc shape as you mentioned.
What I probably forgot to mention is that we want to use it in space.
Therefore it should be non-reactive with radiation and atomic oxygen and it must have a life of 7 years.
According to articles, the NdFeB magnets do not last very long in this environment and SmCo should rather be used.

SmCo Permanent Magnets Manufacturer  China Rare Earth Magnet Limited:
Actually, SmCo magnets best fit for the application of aerospace.
Please send us an enquiry of the magnets when you have specific information of the magnets.

Tags: permanent magnet, SmCo magnets, NdFeB magnets, magnet manufacturer, China magnet