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[en] Alloys of strontium and barium with neodymium were investigated with the aim of finding new materials based on these metals and showing increased strength characteristics. Cast and annealed Sr-Nd and Ba-Nd alloys were studied by means of X-ray structure, metallographic, and differential-thermal analysis. It was shown that the Ba-Nd and Sr-Nd systems were characterized by the presence of wide immiscibility regions in the liquid state and a limited mutual solubility of the components in the solid state
[en] Magnetic viscosity parameters kT/q(=Sv) of sintered and melt spun NdFeB vary with internal field. During initial magnetization of thermally demagnetized specimens signifiant viscosity occurs with melt spun NdFeB but is negligible with sintered NdFeB. Differences in mechanisms of magnetization account for this behaviour
[en] A diagram of phase equillibria in the range of 0-50 at% Sn is plotted and the structure of neodymium-tin alloys is studied by the methods of thermal analysis, radiography, metallography. Eutectic crystallization takes place at 870+-10 deg C. The β-Nd base solid solution decomposes eutectoidally at 820+-10 deg C. The Nd5Sn3 metallide melts congruently at 1640+-10 deg C. The Nd5Sn4 metallide (Sm5Ge4 structural type) is found which is formed in the peritectical reaction at 1500+-10 deg C
[en] The anisotropy of the Nd_2Fe_1_4B powder is originated during the creation of a fine Fe2B lamellar structure in the disproportionation step. The aspect ratio (A/R) of Fe2B structure increased from 3.37 ± 1.5 to 6.69 ± 3.2 during phase decomposition for 0 ∼ 60 min at 820 ℃ (P_H_2 = 10 kPa). The Fe_2B having high A/R ratio recombined Nd_2Fe_1_4B, which is close to the single domain, and the magnetic properties are also improved with increasing A/R ratio.
[en] In recent years a new technique of magnet soldering has been developed by Alexander B Temnykh for undulator fabrication. In this method, the Ni coated NdFeB magnets are soldered to a copper base at an appropriate temperature. The method has the unique advantage of getting array with the complicated magnet keepers to fix the magnets to the jaws. In this paper we study and analyze this method at IDD Laboratory, DAVV, Indore. The 12.5 x 12.5 x 50 mm NdFeB magnets are soldered to a copper base12.5 x 12.5 x 90 mm. The test results of one period PPM structure have been presented. (author)