Current challenges in NdFeB permanent magnets manufacturing by Powder Injection Molding (PIM): A review

• Powder Injection Molding is a net-shape process allowing to avoid machining steps. • PIM is of great interest to produce NdFeB permanent magnets with complex shapes. • Organic contaminations of NdFeB magnets significantly lower the magnetic properties . • Recent works aimed to reduce the carbon and oxygen content of PIM-produced magnets. • The present review highlights the key parameters to limit organic contaminations.