Knowledge Base
Insights, expert advice, and industry-leading information to fuel your understanding
Our permanent magnets and magnet assemblies are designed to meet the unique needs of your application. Therefore, as a valued customer, you are assured of quality products, timely service and competitive pricing. Here is a self-serve repository of information pertaining to our magnetic products.
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Magnetic Behaviour of Materials
When exposed to a magnetic field, materials can respond in a variety of ways. This is largely determined by the material’s electronic structure. We distinguish between the following types of magnetic behaviour:
- Diamagnetism
- Ferromagnetism
- Anti-ferromagnetism
- Ferrimagnetism
- Paramagnetism
- Pauli paramagnetism
- Super paramagnetism
- Spin glass magnetism
Magnetite
In ancient times, people discovered that magnetite crystals attract or repel each other, depending on their orientation. This physical phenomenon is called magnetism. The words magnetite and magnesium are both derived from Magnesia, the name of an area in the Thessalyë region of ancient Greece where magnetic stone can be found in abundance.
It is the iron in the rock that is responsible for the magnetic properties of magnetite. Many iron alloys possess magnetic properties. Besides in iron, we find magnetic properties in nickel, cobalt, and gadolinium as well.
Material Certifications
Material certificate, also known as mill test report (MTR) or mill test certificate (MTC), is a quality assurance document used in the metals industry that certifies material’s technical parameters such as chemistry, mechanical or other physical properties, manufacturing routes, heat treatment details, testing results or compliance to a set of international or local standards.
Measurement of Quantity of Magnetism
Since the magnetic field is invisible, obtaining a complete, quantitative representation of it requires measurement of both its strength and its direction.
It is possible to measure the exact field strength and direction of a magnet by using a Gaussmeter/Teslameter.
Gaussmeters work because of the Hall Effect, a phenomenon discovered by Edwin Hall in 1879. Hall found that a magnetic field will impact the flow of an electric circuit. We now know that we can measure this impact to determine the strength of a magnetic force.
Mechanical Assembly
Press fits, interference fits, fasteners, threads and clips are some of the lowest risk methods of assembling components available, with also having the ability to test and validate. Goudsmit UK will often look at mechanical assembly as a first-choice solution.
Metal Injection Moulding (MIM)
Metal injection moulding is a natural progression from magnets to polymer injection moulding. Goudsmit UK specialise in the design and manufacture powder injection moulding products, including metal injection moulding (MIM) and ceramic injection moulding (CIM) technologies of complex, high volume, net-shaped components.
MIM involves manipulating metal powders to behave like a plastic by mixing them with polymer binders to form a feedstock. This feedstock is used to injection mould net shaped, precision components. Parts are then thermally processed to remove the binder system and then sintered to a high-density metal component.