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內(nèi)擴(kuò)散法Nb3Sn多芯線材的磁化特性研究
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TM270.14

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Magnetization and Susceptibility of an Internal Sn Processed Nb_3Sn Wire
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    摘要:

    研究了內(nèi)擴(kuò)散法Nb3Sn多芯線材隨溫度和磁場(chǎng)變化的磁化曲線及磁化率,繪出了磁化量-磁場(chǎng)-溫度(M-H-T)的三維臨界曲面,歸一化后的磁化曲線基本符合Kramer擬和方程。計(jì)算得到的Nb3Sn多芯線材有效直徑比芯線的原始幾何尺寸要大,其原因在于微觀結(jié)構(gòu)中存在著“橋梁”,分析表明,多余的磁滯損耗來(lái)自于“橋梁”。交流磁化率和X’和X″在給定頻率和背景磁場(chǎng)下,隨交流振幅的變化很小,在給定交流振幅下,隨交流

    Abstract:

    Magnetization (M) and susceptibility versus temperature (T) and magnetic field (H) of an internal-Sn processed Nb,Sn wire have been studied and the critical M-H-T surface has been plotted. The normalized magnetization vs. applied field has been filled to Kramer's equation. The effective filament diameter is estimated to be larger than the original filament size. Bridging between the filaments is account for the extra hysteresis. The values of X' and X" do not change much with AC amplitude in a certain background field and frequency, but do change with frequencies for a given AC amplitudes. The interfilament coupling is mainly from bridging, not from proximity effect.

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毛大立 伊藤喜久.內(nèi)擴(kuò)散法Nb3Sn多芯線材的磁化特性研究[J].稀有金屬材料與工程,1998,(6):363~366.[Mao Dali, Kikuo Itoh, Hitoshi Wada. Magnetization and Susceptibility of an Internal Sn Processed Nb_3Sn Wire[J]. Rare Metal Materials and Engineering,1998,(6):363~366.]
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