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Fe-Si-B-Cu體系中原位析出非晶/晶體復(fù)合粉末的制備與性能研究
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1.廈門大學(xué)材料學(xué)院及福建省材料基因工程重點(diǎn)實(shí)驗(yàn)室;2.福建省材料基因工程重點(diǎn)實(shí)驗(yàn)室

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，項(xiàng)目號(hào)： 51471138 和 51771158 ）


In situ formation of an amorphous-core/crystalline-shell composite powder in liquid immiscible Fe-Si-B-Cu system
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College of Materials and Fujian Provincial Key Laboratory of Materials Genome

Fund Project:

National Natural Science Foundation of China (Grant Nos. 51471138 and 51771158 )

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    摘要:

    本研究基于相圖計(jì)算的CALPHAD方法和超音霧化技術(shù),設(shè)計(jì)并制備了具有典型核/殼結(jié)構(gòu)的(Fe<sub>0.75</sub>Si<sub>0.1</sub>B<sub>0.15</sub>)<sub>100</sub><sub>-</sub><sub>x</sub>Cu<sub>x</sub> (x = 0, 30, 45, 55, 65, at.%)非晶/晶體復(fù)合粉末。實(shí)驗(yàn)研究了該系列晶體/非晶復(fù)合粉體的顯微組織,熱穩(wěn)定性,形成機(jī)理和磁性能。研究結(jié)果表明：本研究制備的復(fù)合粉體均由分布在核層的富FeSiB非晶相和殼層的富Cu相組成。磁滯回線結(jié)果表明,隨著Cu含量的增加,飽和磁化強(qiáng)度呈線性關(guān)系逐漸降低,但對(duì)矯頑力的影響并不明顯。該類非晶/晶體復(fù)合粉體的形成過程為：1)高溫下富Cu相和富FeSiB相的液相分離現(xiàn)象誘發(fā)形成核/殼組織；2)由于富Cu相的玻璃形成能力遠(yuǎn)低于富FeSiB相,在超音霧化過程中,富FeSiB相從液態(tài)被凍結(jié)為非晶態(tài),最終形成具有核/殼結(jié)構(gòu)的非晶/晶體復(fù)合粉體。

    Abstract:

    Based on the CALPHAD (Calculated of Phase Diagrams) approach, series micro-scale amorphous/crystalline composite powders of (Fe0.75Si0.1B0.15)100-xCux (x = 30, 45, 55, 65, at.%) with core/shell microstructure were designed and successfully fabricated by using the gas atomization method. The obtained gas-atomized powder exhibits a Fe-Si-B-rich amorphous-core/Cu-rich crystalline-shell composite microstructure. Results indicate that the coercive force of the composite powders is almost the same as Fe75Si10B15 amorphous powder, but their saturation magnetization decreases with increasing Cu concentration. The formation mechanism of such amorphous-core/crystalline-shell composite powders is originated from the occurrence of liquid phase separation at high temperature and the different glass-forming ability (GFA) of the two separated liquids (Cu-rich and FeSiB-rich) during the rapid solidification process.

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引用本文

劉興軍,朱家華,郁炎,張錦彬,楊水源,王翠萍. Fe-Si-B-Cu體系中原位析出非晶/晶體復(fù)合粉末的制備與性能研究[J].稀有金屬材料與工程,2020,49(1):109~115.[Xingjun Liu, Jiahua Zhu, Yan Yu, Jinbin Zhang, Shuiyuan Yang, wangcuiping. In situ formation of an amorphous-core/crystalline-shell composite powder in liquid immiscible Fe-Si-B-Cu system[J]. Rare Metal Materials and Engineering,2020,49(1):109~115.]
DOI：10.12442/j. issn.1002-185X.20180875

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  • 收稿日期:2018-08-16
  • 最后修改日期:2018-09-13
  • 錄用日期:2018-10-09
  • 在線發(fā)布日期: 2020-02-16
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