ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The sintering of Sm2Fe17 compound prior to the nitrogenation process is studied as analternative process to produce dense Sm2Fe17N3 hard magnets with higher maximum energyproducts (BH)max than conventional polymer bonded magnets. In order to optimize sintering andnitrogenation processes, powders made from alloys, with different compositions, in the as-cast aswell in the as-homogenized state were used. It could be shown that the amount of α-Fe, formed inthe casting process, was reduced during sintering and that Sm selective loss is restricted to thesurface up to a depth of 100 +m. Moreover the density of the sintered samples was not muchaffected by the initial composition or by the prior homogenization of the alloys. Although thenitrogenation process was successful in producing the Sm2Fe17N3 as proved by the mass gain,magnetic properties measurements and X-Ray diffraction, the hard magnetic properties were muchlower than expected, indicating that other variables, which are discussed in the text, must beconsidered
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.75.pdf
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