CHARACTERIZATION OF A MULTIFILAMENTARY Nb3Al WIRE FABRICATED BY RAPIDLY HEATING AND RAPIDLY QUENCHING METHOD

Acta Metall Sin

1998, Vol. 34

Issue (7): 735-741 DOI:

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CHARACTERIZATION OF A MULTIFILAMENTARY Nb3Al WIRE FABRICATED BY RAPIDLY HEATING AND RAPIDLY QUENCHING METHOD

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MAO Dali(The Public Laboratory of State Education Commission for High Temperature Materials and High Temperature Tests; Department of Materials Science; Shanghai Jiaotong University; Shanghai 200030)ITOH Kihao;WADA Hitoshi(National Research Institute for Metals; Tsukuba; Ibaraki 305; Japan). CHARACTERIZATION OF A MULTIFILAMENTARY Nb3Al WIRE FABRICATED BY RAPIDLY HEATING AND RAPIDLY QUENCHING METHOD. Acta Metall Sin, 1998, 34(7): 735-741.

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Abstract A rapidly heating and rapidly quenching method for the manufacturing of multifilamentary Nb3Al wire was introduced, which can obtained Nb3Al with the near stoichiometric composition. After annealing at 800 ℃ for 2, 12 and 96 h, critical temperature Tc of the samples measured by four probe method is 17 K. Critical curreds Ic was measured in the function of temperature and applied field in a split pair magnet. The relationship of normalized pinning force vs applied field follows simple Kramer equation. Grain boundaries were most probable pinning source for the magnetic line of force. The obtained upper critical field Bc2 existed a linear relation with the temperature. A critical surface of Ic - T - B was also plotted from the measurement of critical current.

Key words: Nb3Al critical temperature critical current critical field

Received: 18 July 1998

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