Preparation of Nd-Fe-B Sintered Magnets by the Fe-powder Addition Method.
نویسندگان
چکیده
منابع مشابه
Impulse Magnetization of Nd-Fe-B Sintered Magnets for Sensors
Magnetization of large Nd-Fe-B sintered permanent magnets is still challenging. This type of permanent magnet is electrically conductive, so impulse magnetization causes a flow of eddy currents which prevent magnetization of the whole volume of the magnet. The paper deals with the impulse magnetization of sintered Nd-Fe-B permanent magnets and shows a method for the determination of suitable pa...
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Iron boron neodymium alloys are multiphase materials, typically processed slightly rich in Nd and B relative to the primary ferromagnetic phase in the system, Nd2Fe14B. Typically, most magnets contain 20-30 vol. % of nonmagnetic phases which are important for good magnetic properties. Powder metallurgy, melt pinning and mechanical alloying have been used to produce magnets although only the fir...
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The interface between the Nd2Fe14B particles and the grain boundary surrounding them in Nd-Fe-B sintered magnets was modified by diffusion Dy metal selectively through the grain boundary involving the reduction of Dy2O3 or DyF3 with CaH2 and the coercivity of them was effectively enhanced from 0.98 MA/m to 1.42 MA/m with keeping the high value of remanence. The resultant coercivity was higher t...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Powder and Powder Metallurgy
سال: 1994
ISSN: 0532-8799,1880-9014
DOI: 10.2497/jjspm.41.732