منابع مشابه
Sintering of Nd-Fe-B Magnets from Dy Coated Powder
High-coercive (Nd,Dy)-Fe-B magnets were fabricated via dysprosium coating on Nd-Fe-B powder. The sputtering coating process of Nd–Fe–B powder yielded samples with densities greater than 98%. (Nd,Dy)2Fe14B phases may have effectively penetrated into the boundaries between neighboring Nd2Fe14B grains during the sputtering coating process, thereby forming a (Nd,Dy)2Fe14B phase at the grain boundar...
متن کاملAn XMCD-PEEM study on magnetized Dy-doped Nd-Fe-B permanent magnets
on magnetized Dy-doped Nd-Fe-B permanent magnets R. Yamaguchi K. Terashima K. Fukumoto Y. Takada M. Kotsugi Y. Miyata K. Mima S. Komori S. Itoda Y. Nakatsu M. Yano N. Miyamoto T. Nakamura T. Kinoshita Y. Watanabe A. Manabe S. Suga S. Imada We have succeeded in developing a method for photoemission electron microscopy (PEEM) on fully magnetized ferromagnetic bulk samples and have applied this te...
متن کاملRadiation-Induced Demagnetization of Nd-Fe-B Permanent Magnets
Introduction The Advanced Photon Source (APS), as well as other third-generation synchrotron light sources, uses permanent magnets in the insertion devices to produce x-rays for scientific research [1,2]. When placed in a high-energy storage ring, these permanent magnets are subjected to irradiation from synchrotron radiation, high-energy bremsstrahlung, and bremsstrahlung-produced neutrons. Pr...
متن کاملHigh performance Nd-Fe-B permanent magnets without critical elements
Scanning electron microscopy, and magnetization measurements reveal that as cast (Nd1 xCex)2Fe14B alloys contain significant amounts of a-Fe that can be dramatically reduced by annealing the alloys at 1000 C for 3 days. The room temperature intrinsic coercivity, Hci, of (Nd0.8Ce0.2)2.2Fe14B melt spun ribbons was found to be 11 kOe, which is ~32e~10% higher in comparison to that of Nd2Fe14B (Hci...
متن کاملAnalysis Technique for Improving Coercivity of Nd-Fe-B Magnets and Development of Dy-free Magnet
Hiroyuki Yamamoto, Dr. Eng. Isao Kitagawa, Dr. Sc. Teruo Kohashi, Dr. Sc. Akira Sugawara, Dr. Eng. Takeshi Nishiuchi, Dr. Eng. OVERVIEW: Hitachi is working to improve the performance of the NdFe-B magnets that help make people’s way of life more energy efficient and reduce the load it places on the environment. To study the factors that govern coercivity, an important parameter of magnet perfor...
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ژورنال
عنوان ژورنال: JOM
سال: 2015
ISSN: 1047-4838,1543-1851
DOI: 10.1007/s11837-015-1439-z