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崔春翔, CUI
Sci China Ser E-Tech Sci April 2007, Vol. 50, No. 2, 184-189,-0001,():
-1年11月30日
Sm3(Fe,Ti)29Nx/α-Fe dual-phase nanometer magnetic material was fabricated through rapid solidification, crystallization and nitridation of Sm-Fe (Ti) alloy. The effect of combination of rapid solidification and Ti alloy addition on the phase formation and microstructure of the Sm-Fe alloy is investigated in this paper. The microstructure of amorphous phase and dual-phase nano-grain crystals before and after crystallization annealing were observed using a high-resolution transmission electron microscope (HREM). The dual-phase nano-grains after annealing were compacted together with a clear interface with the direct exchange-coupling mechanism. Different annealing processes were used to examine the melt-spun alloy. Comparison of the images of SEM showed that annealing at 750℃ for 10 min was most suitable to get homogeneous and nano-grains. No obvious kink was detected in the second quadrant of the hysteresis loop like a single hard magnet, and strong exchange coupling was found between hard magnets and soft magnets.
rapid solidification, microstructure, Sm3(, Fe,, Ti), 29Nx/, α-Fe, dual phase nanocomposite, exchange-coupling
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崔春翔, Chunxiang
Acta Materialia 52 (2004) 5757-5760,-0001,():
-1年11月30日
Single-crystal MgB2 nanoparticles, with diameters in the range 20–100 nm, have been synthesized in situ in the sample chamber of an X-ray diffractometer. The reaction kinetics are analyzed and related to the atomic-level structure of the particles as observed by high-resolution electron microscopy. Synthesis conditions may have a significant influence on microstructure and superconducting properties.
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崔春翔, Chunxiang
ADVANCED ENGINEERING MATERIALS 2003, 5, No. 10,-0001,():
-1年11月30日
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