Fe-Mn-Si-B-Cu合金的玻璃形成能力與軟磁性質研究

The Glass Forming Ability and Soft Magnetic Properties of Fe-Mn-Si-B-Cu Alloy

吳柏勳(Bo-Syun Wu)

指導教授 ： 陳適範 ； 林於隆

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00483

摘要

本研究以添加微量銅(Cu)藉由熱處理來改善鐵錳矽硼非晶合金之軟磁性質並保有良好的非晶形成能力。以單輥熔射旋淬法製備成份Fe75Mn3Si10B12-XCuX(x=0, 1, 2, 3, 4 at.%)之五元合金薄帶。以X光繞射儀(XRD)及熱游離電子顯微鏡(SEM)鑑定試片之微觀結構。以示差掃描熱分析儀(DSC)分析材料之特性性溫度。以振動樣品磁力儀(VSM)量測試片的飽和磁化強度(Ms)及矯頑磁力(Hc)。以熱重分析計(TMA)量測試片之居里溫度(Tc)。
當銅添加量為2 at%以下時，由XRD，SEM-SEI分析顯示合金薄帶皆為非晶質結構。當銅添加量在3 at%以上，可由XRD，SEM-SEI分析出α-Fe、Fe3Si、Mn2B0.98相。藉由示差掃描熱分析儀測量非晶質結構(Cu=0, 1, 2 at.%)的合金薄帶，其過冷液態區間(ΔTx)分別為166.23 K和53.74 K。合金薄帶其結晶化溫度(Tx)隨著銅含量增加而有往低溫方向移動之趨勢。
Cu=1 at.%的合金薄帶，以300℃的退火60s時，有最低的矯頑磁力5.41 A/m。在450℃的退火下，有最高的飽和磁化強度1.57 T。藉由添加Cu於非晶基質中形成異質成核點可有效改善其軟磁性質。

關鍵字

非晶合金 ； 玻璃形成能力 ； 軟磁性質

並列摘要

The glass forming ability and soft magnetic properties of Fe-Mn-Si-B-Cu were investigated in this study. Multi-component alloy ribbons with compositions of Fe75Mn3Si10B12-XCuX(x = 0, 1, 2, 3, 4 at.%) were synthesized by the single roller melt-spinning method. To examine the thermal properties, the as-cast ribbons was measured with differential scanning calorimetry(DSC). Microstructure were examined by X-ray diffractometer(XRD) and scanning electron microscopy(SEM).
Alloying additions of Cu=0, 1, 2 at.% were confirmed amorphous by XRD and SEM images. When the additions came up to Cu=3, 4 at.%, α-Fe、Fe3Si、Mn2B0.98 phase were identified. Amorphous ribbons’ thermal properties were measured, supercooled liquid regions were 166.23 K and 54.73 K when additions of Cu=0, 1, at.% respectively. The saturation magnetization Ms was increased from 1.45 T to 1.57 T and coercivity Hc was decreased from 21.41 A/m to 5.41 A/m when annealing Fe75Mn3Si10B11Cu1 for 60s at 573 K and 673 K. It was verified that Cu alloying additions increased the nucleation rate can improve the soft magnetic properties of alloy ribbon.

並列關鍵字

Amorphous alloy ； Glass forming ability ； Soft magnetic properties

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