Ultrasonic welding of magnetic hybrid material systems –316L stainless steel to Ni/Cu/Ni-coated Nd2Fe14B magnets

Abstract The performance of electric sensors is continuously improving due to the demands modern vehicles and electronic devices. Magnetic are used in a wide field applications. However, handling mounting typical high-performance rare earth permanent magnets challenging their brittleness. A constant magnetic flux key property setup many State-of-the-art adhesive bonding devices can cause problems low durability viscous behaviour polymers, as magnet may change its position hence, distribution changes. Ultrasonic welding powerful technique join hybrid material systems quickly reliably, providing high joint strength, even for brittle materials such glasses, ceramics magnets. latter being investigated this work first time. ultrasonic process was adapted 316L stainless steel, representing potential components devices, Ni/Cu/Ni-coated Nd 2 Fe 14 B. In addition directly joined steel/magnet-hybrids, ductile aluminium nickel interlayers were order enhance strength. Process parameters developed evaluated considering resulting shear strength joints. highest 35 MPa achieved 316L/Nd B 316L/Al/Nd B, which more than twice adhesively bonded joints up 20 MPa, according literature. functional systems, by density joints, those with interlayer, did not show any losses comparison single initial state. Joints an interlayer showed 3% 7% density. summary, results indicate that suitable improve production