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An AFM investigation of the mesostructure of Fe-based

The mesostructure at the cross section of the Fe-based nanocrystalline (Fe73.5Cu1Nb3Si13.5B9) ribbon was observed with atomic force microscopy (AFM). An apparent mesostructural difference was found between the sticking roller face area (SRFA) and the free face area (FFA) of the ribbon crystallized after annealing. In SRFA there is a preponderance of rough grain gathering in longitudinal Characterization of grain structure in nanocrystalline Nanocrystalline structures exhibit properties that are different from conventional coarse-grained structures. The unique properties result from both the reduced grain size and the large fraction of grain boundaries. Grain size and the grain size distribution (GSD) are important para-meters for characterizing the structure of the nanoscale

Development of Nanostructure Formation of

In the nanocrystalline state, Cu helps the nucleation of -Fe(Si) grains while Nb controls their growth, Si and B has been used as glass forming materials. Thus on the residual amorphous, the nanometric Fe(Si) grains develops. From broadening of fundamental peaks, the optimum grain size has been determined in the range of 7 - 23 nm. Role of composition and grain size in controlling the Role of composition and grain size in controlling the structure sensitive magnetic properties of Sm 3+ substituted nanocrystalline Co-Zn ferrites Anil B. Mugutkar, Shyam K. Gore, Umakant B. Tumberphale, Vijaykumar V. Jadhav , Rajaram S. Mane, Sunil M. Patange, Sagar E. Shirsath, Santosh S. Jadhav * Structural, thermal, and magnetic properties of Fe79MoxB20 Abstract Fe79MoxB20xCu1 amorphous and nanocrystalline alloys (x = 2, 4, 6, 8 and 10) were studied to investigate the influence of Mo and B contents on crystallization, structural, and magnetic properties. Samples were prepared by rapid solidification of alloy ingots using a single wheel melt spinner. Primary and secondary crystallization temperatures increased with the Mo content in the alloys.

Structure and magnetic properties of nanocrystalline

The role of effective anisotropy in nanocrystalline ferromagnets is investigated. These alloys are prepared by annealing amorphous ribbons and have excellent soft magnetic properties. A two-phase model is established considering the role of the intergranular amorphous phase. The results indicate a strong dependence of effective anisotropy on the structure and magnetic parameters of the Structure and magnetism of nanocrystalline exchange Apr 01, 2006 · Structural and magnetic characterizations of nanocrystalline films of (Ni 0.67 Co 0.25 Fe 0.08 ) 89-x Zr 7 B 4 Cu x (x=0,1) alloys are reported. The films were grown on quartz substrates using pulsed laser deposition from homogeneous targets of the above compositions at substrate temperatures ranging from ambient to 600 °C. Structure and performance of anisotropic nanocrystalline Dec 01, 2017 · As was reported, the conventional nanocrystalline magnets by MQII process (HP) or SPS generally exhibit coarse grains in the initial particle boundaries,, which is responsible for the significantly reduced coercivity after HD. On the contrary, our HVCed magnets can maintain the original nanostructure of the powders.

Grain structure and magnetism of nanocrystalline

Amorphous ribbons of composition Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ have been annealed above their crystallization temperature which produces a homogeneous, ultrafine grain structure of {alpha}-FeSi with typical grain diameters of 10-20 nm. The temperature dependence of