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納米晶(FeCo)78Nb6B15Cu1合金晶化過程及其磁特性研究
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Crystallization Process of Nanocrystalline (FeCo)78Nb6B15Cu1 Alloy and Its Magnetic Characterization
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    摘要:

    采用熔體快淬法制備(FeCo)78Nb6B15Cu1非晶薄帶,通過DSC測(cè)試薄帶的晶化特性,并據(jù)此在400,500,700和 750 ℃進(jìn)行1 h退火處理。用XRD和SEM分析薄帶在不同退火溫度下的晶化行為,并用VSM測(cè)試薄帶與粉體的靜態(tài)磁參數(shù)。結(jié)果表明:對(duì)于固定成分的Hitperm合金,選擇合適的退火溫度,可控制晶粒大小和晶相比例。由于晶粒表面無序磁矩含量的變化,導(dǎo)致材料比飽和磁化強(qiáng)度發(fā)生變化,同時(shí)更小的納米晶粒對(duì)降低矯頑力有利。由于淬態(tài)引入的微量結(jié)晶,薄帶存在表面晶化現(xiàn)象,這在一定程度上會(huì)惡化材料的靜態(tài)磁特性

    Abstract:

    (FeCo)78Nb6B15Cu1 amorphous ribbons were prepared by a melt-quenching method; crystallization characteristics of the ribbons were tested by DSC, and accordingly annealing at 400, 500, 700 and 750 oC for 1 h were carried out. Crystallization behavior of the ribbons at different annealing temperatures was analyzed by XRD and SEM and the static magnetic parameters of the ribbon and the powder were measured by VSM. The results show that for the Hitperm alloy with a fixed composition, a suitable annealing temperature can control the grain size and phase ratio and adjust disorder magnetic moment of the grain surface, thereby improving the specific saturation magnetization of material. Moreover, the small nano-grain is favorable for depressing the coercivity. Due to the introduction of ultracrystallite when quenching, there is crystallization on the surface of the ribbon, which will worsen the static magnetic properties of materials to a certain extent

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王 昕,余志海,周佩珩,梁迪飛,鄧龍江.納米晶(FeCo)78Nb6B15Cu1合金晶化過程及其磁特性研究[J].稀有金屬材料與工程,2010,39(4):682~686.[Wang Xin, Yu Zhihai, Zhou Peiheng, Liang Difei, Deng Longjiang. Crystallization Process of Nanocrystalline (FeCo)78Nb6B15Cu1 Alloy and Its Magnetic Characterization[J]. Rare Metal Materials and Engineering,2010,39(4):682~686.]
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  • 收稿日期:2009-04-23
  • 最后修改日期:2010-01-14
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