微量Pd對Fe-Si-B非晶合金之玻璃形成能力及軟磁性質研究

Glass forming ability and soft magnetic properties of Palladium added Fe-Si-B amorphous alloy

陳俊明(Chun-Ming Chen)

指導教授 ： 陳適範 ； 林於隆

國立臺北科技大學/工程學院/材料及資源工程系研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00508

摘要

本研究藉由添加微量的鈀（Pd）來探究其對Fe-Si-B非晶合晶之玻璃形成能力及軟磁性質之影響。(Fe75Si10B15)100-xPdx (x = 0，0.5，1，2 at%)母合金的之製備在真空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。
結果顯示: (Fe75Si10B15)100-xPdx合金薄帶經以XRD及SEM分析與觀察，0 at%Pd及0.5 at%Pd之薄帶產生些微結晶之現象。當Pd添加在1 at%與2 at%Pd的薄帶皆呈現非晶質結構。 從DSC熱分析當Fe-Si-B非晶合金添加Pd後具有Tg的特徵溫度，而以添加1 at%Pd具有最佳之GFA(glass forming ability)，所得Tg為767.8K與Tx為841.3 K。最後，藉由Kissinger plot 獲得1 at%Pd具有最高之晶化能達447.95 kJ/mol，意旨有高的熱穩定性。磁性的量測顯示，1 at%Pd與2 at%Pd之Ms分別為1.28、1.30 T，而Hc則為33.0、30.8 A/m。而Fe-Si-B非晶質薄帶具有最高Ms為1.52 T，但Fe-Si-B非晶質基底具微晶的存在，以至於Hc偏高為49 A/m。接著，將1 at%Pd經由不同溫度應力消除退火處理，而磁性質獲得最佳改善為退火溫度650K，Ms從1.28 T提升為1.34 T，而Hc從33.0 A/m下降至14 A/m。顯示進行消除應力熱處理確實減少晶格應變的內應力與急冷所引起的殘留應力，因此退火熱處理改善添加Pd元素造成磁性的損失。

關鍵字

薄帶 ； 非晶質 ； 軟磁

並列摘要

The effect of minor Pd addition on glass forming ability and soft magnetic properties of Fe-Si-B metallic glass were investigated. The (Fe75Si10B15)100-xPdx (x = 0，0.5，1，2 at%) ingots via vacuum-arc-melting under argon atmosphere. A single roller melt-spinning method was employed to produce the alloy ribbons.
Structural results show that:(Fe75Si10B15)100-xPdx amorphous alloy ribbons, 0 at%Pd and 1 at%Pd ribbons have a tendency to slightly crystalline by XRD analysis and SEM observation. When Pd addition of 1% and 2% alloy belong to the amorphous structure. DSC thermal analysis shows that Fe-Si-B amorphous alloy add Pd has a Tg of characteristic temperature. And when the addition of 1at% with the best GFA (glass forming ability), the results for the Tg is 767.8 K and Tx is 841.3K. Finally, Kissinger plot method to obtain 1 at% has the highest activation energy of crystallization reach 447.95 kJ/mol, that show it has high thermal stability. The magnetic measurements show the value of Ms is 1.28 T, 1.30 T,and the value of Hc is 33.0, 30.8 A/m for 1 at%, 2 at%. The Fe-Si-B amorphous ribbons with the highest Ms 1.52 T. The Fe-Si-B The alloy has the exist of microcrystals in the amorphous base, so that the value of Hc is as high as 49 A / m. Then, 1 at% alloy ribbons annealed at different temperatures for 10 minutes. The magnetic properties of the best improvements for the annealing temperature of 650K, Ms upgrade from 1.28 T to 1.34 T, Hc from 33.0 A/m down to 14.0 A/m. Therefore, The stress-relief annealed treatments really reduce the residual stress caused by the internal stress of the lattice strain and quench. Therefore, the annealing heat treatment to improve the magnetic losses caused by the addition of the Pd.

並列關鍵字

ribbon ； amorphous ； soft magnetic

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