These magnets are primarily composed of neodymium, iron, and boron, and they are widely used in various applications, from electric motors to consumer electronics. As industries continue to innovate, understanding the testing methods for magnetic performance and the effects of deep cryogenic treatment on sintered neodymium magnets has become increasingly important.

Magnetic performance testing is crucial for ensuring the quality and reliability of sintered neodymium magnets. Several common methods are employed to evaluate their magnetic properties. One of the widely used techniques is the measurement of flux density using Gaussmeters. This method involves placing the sintered neodymium magnet in a magnetic field and measuring the strength of the magnetic field at various points. The data obtained helps in determining the magnet's performance under different conditions.

Another essential testing method is the hysteresis test, which generates a BH curve that illustrates the relationship between magnetic flux density (B) and magnetic field strength (H). This test is vital for understanding the coercivity and remanence of sintered neodymium magnets, which are critical parameters for their application in high-performance environments. The hysteresis graph provides insights into how the magnet behaves under varying magnetic fields, allowing manufacturers to improve their products for specific uses.