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  • 學位論文

Fe-Nb-B-Ta合金的玻璃形成能力及軟磁性質之研究

The Glass Forming Ability and Magnetic Properties of Fe–Nb–B–Ta Metallic Glasses

指導教授 : 陳適範 林於隆

摘要


本研究藉由添加微量的鉭(Ta)來探究其對Fe-Nb-B金屬玻璃之玻璃形成能力及軟磁性質之影響。(Fe72Nb4B24)100-xTax (x = 0,1,2,3,4,5及6 at.%)母合金的製備係使用電弧熔煉爐在氬氣氛下進行,接著以單輥熔射旋淬法製備出薄帶,此外並利用水冷銅模澆鑄直徑2 mm棒材。經以XRD及SEM檢驗(Fe72Nb4B24)100-xTax合金薄帶,可以觀察到當Ta添加在0 at.%到4 at.%的合金間皆屬非晶質結構,熱分析結果顯示,隨Ta的含量由0 at.%增加至5 at.%時,ΔTx(= Tx-Tg) 從54.5 K(Ta = 0 at.%)上升至70.7 K (Ta = 3 at.%)接著再逐漸下降至55.9 K(Ta = 5 at.%)。在Ta添加至3 at.%時,該合金具備最大的過冷液態區ΔTx(= Tx-Tg)、Trg (= Tg/Tm or Tg/Tl)、γ、Rc、Zc及Dmax,其寬廣的過冷液體區間,意味著Fe-Nb-B-Ta非晶薄帶具有良好的熱穩定性。而在軟磁性質的表現上,透過熱磁分析儀(TMA)及樣品磁力儀(VSM)的量測得知,隨著Ta的添加量從0 at.%增加至6 at.%時,薄帶的飽和磁化強度(Ms)從1.14 T降至0.64 T,矯頑磁場(Hc)則由62.5 A/m降至13.2 A/m (1 at.% Ta),再逐漸提高至65.6 A/m;以棒材試樣而言,其飽和磁化強度(Ms)從1.3 T降至0.9 T,矯頑磁場(Hc)從3118 A/m降至2677 A/m (1 at.% Ta),再逐漸增加至5962 A/m。因此Ta的添加量為1 at.%時,可以使非晶合金薄帶及棒材具有良好的玻璃形成能力,同時具備最佳的軟磁特性。

並列摘要


The effects of Ta addition on glass forming ability and soft magnetic properties of Fe-Nb-B metallic glass were investigated. The (Fe72Nb4B24)100-xTax (x = 0,1,2,3,4,5 and 6 at.%) ingots were arc-melted under argon atmosphere. A single roller melt-spinning method was employed to produce the alloy ribbons, and the copper mold injection casting was used to prepare 2mm

參考文獻


[99] 簡幼軒,Fe-Nb-B-Hf非晶質合金玻璃成形及軟磁性質之研究,碩士論文,國立台北科技大學材料科學與工程研究所,台北,2009。
[3] M.Telford , “The case for bulk metallic glass”, Materials Today, 7 (2004) 36.
[4] A. Inoue, T. Zhang, T. Masumoto, “Preparation of bulky amorphous Zr-Al- Co-Ni-Cu alloys by copper mold casting and their thermal and mechanical properties” ,Materials Transactions, 36 (1995) 391.
[5] A. Inoue, “High strength bulk amorphous alloys with low critical cooling rates”, Materials Transactions, 36 (1995) 866.
[7] A. Inoue, T. Zhang, “Impact fracture energy of bulk amorphous Zr55Al10Cu30Ni5 alloy”, Materials Transactions, 37 (1996) 1726.

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