Preparation process of sintered NdFeB magnets (1) - Raw material Today we start with the link of raw material preparation and alloy preparation. Sintered magnets usually use pure metals or intermediate alloys as raw materials, use the electromagnetic induction heating principle of eddy current generated by alternating magnetic fields in the raw materials, and conduct [...]
Preparation process of sintered NdFeB magnets (2) - Milling powder In the previous issue, we learned about alloy smelting and casting. After casting, the alloy needs to be made into powder through a pulverizing process before entering the subsequent processing process. Obtaining suitable powder shape, average particle size and particle size distribution is the basic [...]
Preparation process of sintered NdFeB magnets (3) - orientation forming Magnetic field orientation forming is to use the interaction between magnetic powder and external magnetic field to arrange the easy magnetization direction of powder particles so that it is consistent with the final magnetization direction of the magnet. This is the most commonly used method [...]
Preparation process of sintered NdFeB magnets (4) - Sintering, heat treatment and machining Sintering and heat treatment The blanks pressed by magnetic field orientation are sintered in a high vacuum or pure inert atmosphere to reach a high density close to 95% of the theoretical density. The magnet holes are in a closed structure, which [...]
NdFeB chemical composition analysis (ICP analysis) The chemical composition analysis of NdFeB materials generally includes: 1-Chemical composition analysis of raw materials, including the chemical composition of rare earth metal raw materials, as well as industrial pure Fe, B-Fe alloys and other metals, such as Ga, Al, Nb, Zr, etc.; 2- The chemical composition of the [...]
Application of High Performance Sintered NdFeB Magnets in Wind Power Generators Abstract: The permanent magnet wind turbine adopts high-performance sintered NdFeB permanent magnets, and the high enough coercive force can prevent the magnets from demagnetization at high temperature. The life of the magnet depends on the substrate material and surface anti-corrosion treatment. The anti-corrosion of [...]
Intriguing Properties and Applications of Functional Magnetic Materials Abstract Functional magnetic materials, also called the smart materials of the future, are a group of materials having important and interesting physical properties, which can be affected when an external magnetic field is applied. They are intriguing models that have a strong impact on improving different technologies. [...]
Paramagnetic vs Diamagnetic vs Ferromagnetic – Magnetism Diamagnetic, paramagnetic, and ferromagnetic are the three main types of magnetic materials. The terms describe diamagnetism, paramagnetism, and ferromagnetism. The different types of magnetism refer to the way a material reacts to an external magnetic field. Here is a look at these three types of magnetism, examples of [...]
What Objects Are Attracted To Magnets? Magnets are very useful in our lives. For example, we can use magnets to attract iron nails, iron keys, and iron scraps, etc. So in addition to these objects that are obviously composed of iron, what other objects can be attracted to magnets? First of all, let us first [...]
Magnetic vs Non-Magnetic Metals Magnetic materials are attracted to a magnet and may even become magnetized. Nearly all magnetic materials are metals. Familiar examples of magnetic metals include iron, nickel, cobalt, and steel. But, magnetism is a complex phenomenon. Not all iron or steel is magnetic. There are even some nonmetals that display magnetism! Here [...]
List of Magnetic Metals What Metals Are Magnetic? Magnetic metals include some pure metallic elements and their alloys. Here is a list of some of the most magnetic metals: Iron Nickel Cobalt Gadolinium Dysprosium TerbiumSome types of steel (e.g., ferritic stainless steel) Neodymium, iron, boron alloy (Nd magnet) Even though both iron and nickel are [...]
Non-Magnetic Metals 1. Aluminum Aluminum isn’t magnetic under normal circumstances, but it does interact with magnets – we call this paramagnetism. This metal isn’t attracted to magnets, so a magnet won’t stick to aluminum. However, when a magnet moves close to aluminum, it causes an electrical field, which interacts with the aluminum. This phenomenon is [...]