Title

Effects of ball milling on the sintering process and superconducting properties of (MgB2)0.96Ni0.04 bulks

RIS ID

104956

Publication Details

Cai, Q., Ma, Z., Liu, Y., Zhao, Q. & Gao, Z. (2012). Effects of ball milling on the sintering process and superconducting properties of (MgB2)0.96Ni0.04 bulks. IEEE Transactions on Applied Superconductivity, 22 (4), 6800405-1-6800405-5.

Abstract

Samples of (MgB 2) 0.96Ni 0.04 prepared by mechanical alloying were sintered at 750 °C for 30 min. The reactive process and generating temperature of the second phase were investigated by employing differential thermal analysis, X-ray diffraction, and scanning electronic microscopy. Corresponding microstructures and superconducting properties have also been analyzed. It is found that two-step milling is effective in refining the structure and in eliminating flux jumps, although the corresponding J c is slightly lowered due to the existence of excessive MgO. This observation indicates that the bulk samples prepared by two-step milling possess stable properties of magnetism and heat compared with the sample prepared by manual milling. 2012 IEEE.

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Link to publisher version (DOI)

http://dx.doi.org/10.1109/TASC.2012.2190600