Pembuatan dan Karakterisasi Magnet Bonded NdFeB dengan Teknik Green Compact Tony Kristiantoro, Nanang Sudrajat, Widhya Budiawan

Abstract

Research manufacture bonded NdFeB permanent magnets by using the techniques of green compact has been done. Bonded magnet is made by using powder MQEP NdFeB magnets, the magnetic powder was chosen because it is very appropriate for use in engineering green compact where it already has a composition MQEP NdFeB powder and epoxy resin as the binder, this powder has the advantages of corrosion-resistant so it is not easy oxidized. MQEP powder is then weighed using a balance digital much as 10 grams of each sample, then compacted by green compact techniques. Samples of compacted and then burned (burn compact) for bonded magnets are strong and compact (not brittle and easily broken). Green compact using a variation of compacting 25, 35 and 45 kg/cm² , while the temperature was varied between 150, 175 and 200⁰ C. Samples were then calculated density compaction results of his physical, tightly measured the magnetic flux by using Gauss Meter Yokogawa and magnetic properties were characterized using Magnet Physik Permagraph Germany. The study produced the best NdFeB bonded magnets in the treatment of green compact with a pressure of 25 kg/cm² and burn compact temperature 200⁰ C is the physical density of 4.74 gr/cm³ obtained measurement results meeting for 2100 Gauss magnetic flux. The results of characterization using magnetic permagraph physik obtained values remanent induction (Br) of 5.8 kG, the coercivity (Hc) of 6.618 KOe and maximum energy product (Bhmax) at 4,56 MGOe.