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AbstractAbstract
[en] A combination of hydrogen decrepitation and planetary ball milling has been used to produce sintered Pr16Fe76B8 magnets. The effects of key process parameters and texture have been studied. The alignment degree (< cos Θ>) has been investigated by X-ray pole figure analysis using the (0 0 4) reflection. Magnets prepared from the alloy decrepitated for 3.6 ks and milled for 1.8 ks exhibited a low degree of crystal alignment (0.71±0.02) due to polycrystalline particles. Increasing the milling time to 4.5ks has led to an improvement in < cos Θ> to 0.84±0.02. This has been ascribed to the smaller particle size with a narrower size distribution as well as a more favorable particle shape for orientation. Superior alignment degree (< cos Θ>=0.88±0.02) has been achieved for the sintered magnet from the alloy decrepitated for 120 s and milled for 5.4 ks. This particular processing condition has led to a magnet with (BH)max=250±5 kJ m-3, value found in magnets produced using roller ball milling, with the advantage of a reduced milling time (about 90%)
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8. Latin American workshop on magnetism, magnetic materials and their applications; Rio de Janeiro (Brazil); 12-16 Aug 2007; S0304-8853(08)00080-2; Available from http://dx.doi.org/10.1016/j.jmmm.2008.02.011; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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