منابع مشابه
- Based Rare - Earth - Free Permanent - Magnet Alloys
This study presents the structural and magnetic properties of melt-spun , , and alloys. Appreciable permanent-magnet properties with a magnetocrystalline anisotropy of about 9.6–16.5 , a magnetic polarization –10.6 kG, and coercivities –3.0 kOe were obtained by varying the composition of these alloys. Structural analysis reveals that the positions of x-ray diffraction peaks of show good agreeme...
متن کاملArtificially produced rare-earth free cosmic magnet
Chemically ordered hard magnetic L10-FeNi phase of higher grade than cosmic meteorites is produced artificially. Present alloy design shortens the formation time from hundreds of millions of years for natural meteorites to less than 300 hours. Electron diffraction detects four-fold 110 superlattice reflections and a high chemical order parameter (S 0.8) for the developed L10-FeNi phase. The ma...
متن کاملHfCo7-Based Rare-Earth-Free Permanent-Magnet Alloys
This study presents the structural and magnetic properties of melt-spun , , and alloys. Appreciable permanent-magnet properties with a magnetocrystalline anisotropy of about 9.6–16.5 , a magnetic polarization –10.6 kG, and coercivities –3.0 kOe were obtained by varying the composition of these alloys. Structural analysis reveals that the positions of x-ray diffraction peaks of show good agreeme...
متن کاملRare-earth Permanent Magnets: New Magnet Materials and Applications
The introduction of rare-earth permanent magnets based on samarium-cobalt in about 1970, and neodymium-iron-boron magnets in the mid-nineteen eighties, has ushered in a new era in hard magnetic materials. This has resulted in a dramatic improvement in permanent magnet performance, with neodymium-iron-boron (Nd2Fe14B) magnets having a magnetic energy product up to an order of magnitude greater t...
متن کاملRetrieval of a metallic foreign body in the neck with a rare earth magnet.
A 30 year old man was referred by the accident and emergency (A&E) department to the oral and maxillofacial surgery unit with small puncture lacerations on his left cheek and lower neck. The patient, a metal fitter, had been hammering on a piece of metal that shattered on impact. Local examination revealed two small lacerations (approximately 2 cm each) sited in the left cheek and left inferior...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 1897
ISSN: 0148-0227
DOI: 10.1029/tm002i002p00045