IMPROVEMENT OF MAGNETIC PROPERTIES OF MELT-SPUN PRODUCED Nd2Fe14B PARTICLES DURING SURFACTANT-ASSISTED BALL MILLING

Abstract

NdFeB permanent magnets are used for variety of applications such as electronics, automotive and clean technology industries. The majority of commercial NdFeB permanent magnets are produced by melt-spinning techniques and sintering. The sintered NdFeB magnets represent about 90% of the total rare earth permanent magnet market. Sintered melt-spin NdFeB magnets exhibit the highest magnetic performance due to their strong crystallographic alignment. These magnets have enabled their applications to operate with the highest energy efficiencies and to be fabricated in the most compact form. In this study, the flaky shaped Nd15Fe77B8 magnetic alloy powders were produced by melt-spinning technique. In this process, the powders were produced by using a single roller melt spinning apparatus with high vacuum atmosphere (10-7 mbar). The flaky shaped Nd15Fe77B6 powders were milled by using the high energy ball milling under vacuum atmosphere with surfactant-assisted material. The experiments were performed to optimize the milling parameters regarding the particle size and magnetic properties of the powders

Keywords

• Nd15Fe77B8 magnetic alloy,Melt spinning,Surfactant-assisted

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