摻雜Co元素Fe-6.5wt%Si磁粉芯制備及性能研究
發(fā)布時間：2018-08-09 15:30
【摘要】：摘要：Fe-6.5wt%合金軟磁性能優(yōu)異。合金磁晶各向異性常數(shù)K1約為3%Si-Fe合金的一半,磁致伸縮系數(shù)λs幾乎為零,鐵損較低。但由于其室溫脆性和低的熱加工性能,冷軋和常規(guī)熱軋方法均難以將板坯直接加工成能實際應用的薄帶或板材,嚴重制約了其在工業(yè)領(lǐng)域的發(fā)展。且由于合金含硅量較高(硅為抗磁性物質(zhì)),鐵硅合金飽和磁感應強度Bs大大降低,難以滿足目前儀器設備的大功率容量和小型輕便化發(fā)展要求。添加合金元素Co可顯著提高Fe-6.5wt%Si合金的飽和磁感應強度Bs,改善其軟磁性能。本研究采用惰性氣體霧化法成功制備了Fe100-xCox-6.5wt%Si (x=0,1,3,5,7,10,15,35,50)合金粉末并通過后續(xù)工藝制備了Fe100-xCox-6.5wt%Si磁粉芯,對粉末制備工藝、絕緣包覆、退火熱處理以及合金成分對磁粉芯性能的影響做了相關(guān)的研究。 在合金熔體過熱100-200℃,霧化壓力為6MPa條件下,采用氣霧化法在Fe-6.5wt%Si基礎(chǔ)上添加Co元素成功制備了Fe100-xCox-6.5wt%Si三元合金粉末。結(jié)果表明：本實驗所采用霧化工藝較穩(wěn)定,霧化粉末成分與名義成分偏差小,碳氧含量低,顆粒球形度高、表面光潔衛(wèi)星球少,且其粒度分布范圍較寬呈單峰分布；霧化Fe100-xCox-6.5wt%Si粉末具有α-Fe相結(jié)構(gòu),衍射譜中沒有觀察到DO3有序相獨立特征峰；不同Co含量對Fe-6.5wt%Si合金飽和磁化強度影響不同,Fe90Co10-6.5wt%Si合金粉末飽和磁化強度Ms值最高,其Ms達到219.26emu/g。 采用偶聯(lián)劑+硅酮樹脂絕緣劑包覆,磁粉表面均勻的覆蓋了一層較薄絕緣層。對比采用磷酸鈍化+硅樹脂與采用偶聯(lián)劑+硅樹脂包覆Fe-6.5wt%Si磁粉芯在f=50kHz, Bm=0.1T條件下磁性能,發(fā)現(xiàn)采用1%ATPS偶聯(lián)劑+4%DC-805硅酮樹脂包覆磁粉芯綜合性能較佳。 由于磁粉顆粒尺寸大小分布不太均勻,顆粒間存在有孔隙,磁粉芯生坯密度相對較低,致密化程度不高。 隨退火溫度升高,粉末顆粒間包覆劑逐漸減少,但磁粉芯斷面沒有觀察到明顯絕緣劑“燒蝕”現(xiàn)象,磁粉表面絕緣層保持相對完好。不同Co元素含量Fe100-xCox-6.5wt%Si磁粉芯磁性能參數(shù)隨退火溫度升高變化規(guī)律不同,400-800℃退火過程中,磁粉芯磁導率u。以Fe100-xCox-6.5wt%Si (x=1,3,5)磁粉芯較高,以Fe100-xCox-6.5wt%Si (x=35,50)較低；磁粉芯矯頑力Hc以Fe100-xCox-6.5wt%Si (x=0,1,3,5,7)磁粉芯較低,且均在500℃退火時達到谷值；磁粉芯損耗Ps以Fe100-xCox-6.5wt%Si (x=0,1,3,5)磁粉芯隨退火溫度升高變化范圍相對較小,損耗值較低。 粉末性質(zhì)對磁粉芯直流性能影響較大,添加適量Co可顯著改善磁粉芯交、直流性能。相同頻率下,Fe95Co5-6.5wt%Si磁粉芯有效磁導率最高,且其損耗明顯低于Fe-6.5wt%Si磁粉芯；而Fe93Co7-6.5wt%Si磁粉芯直流磁性能較好,其飽和磁感應強度Bs=1.7179T。綜合比較,Fe95Co5-6.5wt%Si磁粉芯具有較優(yōu)異的綜合軟磁性能。
[Abstract]:Fe-6.5wt% alloy has excellent soft magnetic properties. The magnetocrystalline anisotropy constant K1 is about half of the 3%Si-Fe alloy, the magnetostrictive coefficient is almost zero, and the iron loss is low. But because of its brittle and low hot working properties at room temperature, the cold rolling and conventional hot rolling methods are difficult to directly process the slab into thin strips or plates that can be applied to the actual application. Because of the high silicon content of the alloy (silicon as an anti magnetic material), the saturation magnetic induction intensity Bs of the ferrosilicon alloy is greatly reduced, and it is difficult to meet the high power capacity and small portable development requirements of the current instrument and equipment. Adding alloy element Co can significantly improve the saturation magnetic induction intensity of Fe-6.5wt%Si alloy Bs. In this study, Fe100-xCox-6.5wt%Si (x=0,1,3,5,7,10,15,35,50) alloy powder was successfully prepared by inert gas atomization and Fe100-xCox-6.5wt%Si magnetic powder core was prepared by subsequent process. The effects of powder preparation, insulation coating, annealing treatment and alloy composition on the properties of magnetic powder core were made. Research.
Under the condition that the alloy melt overheated 100-200 C and the atomization pressure was 6MPa, the Fe100-xCox-6.5wt%Si three element alloy powder was successfully prepared by adding Co element on Fe-6.5wt%Si based on the aerosol method. The results showed that the atomization technology was more stable, the composition of the atomized powder and the nominal composition were small, the carbon and oxygen content was low, and the sphericity of the particles was low. The surface light and clean satellite balls are small, and the size distribution of the Fe100-xCox-6.5wt%Si powder has a single peak distribution, and the atomized Fe100-xCox-6.5wt%Si powder has a -Fe phase structure. The independent characteristic peak of the ordered phase is not observed in the diffraction spectrum; the different Co content has different influence on the saturation magnetization of the Fe-6.5wt%Si alloy, and the saturation magnetization M of the Fe90Co10-6.5wt%Si alloy powder M The s value is the highest, and its Ms reaches 219.26emu/g.
The magnetic properties of the magnetic powder coated with the coupling agent and silicone resin insulating agent covered a thin layer of insulation. The magnetic properties of the magnetic powder core coated with the coupling agent + silicon resin and the Fe-6.5wt%Si magnetic powder core coated with the coupling agent + silicon resin were compared. The comprehensive properties of the magnetic powder core coated with the 1%ATPS coupling agent +4%DC-805 silicone resin were found. Better.
Because the size distribution of magnetic powder particles is not uniform, there are pores between particles, the density of magnetic powder core green is relatively low, and the densification degree is not high.
With the increase of annealing temperature, the coating agent of powder particles decreases gradually, but there is no obvious "ablation" phenomenon in the magnetic powder core section, and the surface insulation of magnetic powder remains relatively intact. The magnetic parameters of the magnetic powder core of different Co elements are different with the annealing temperature. During the annealing process at 400-800, the magnetic particles are magnetic. The core magnetic permeability U. is high in Fe100-xCox-6.5wt%Si (x=1,3,5) magnetic core and low in Fe100-xCox-6.5wt%Si (x=35,50), and the magnetic core coercive force Hc is low in Fe100-xCox-6.5wt%Si (x=0,1,3,5,7) magnetic core, and all reaches the valley value at 500 C. The magnetic core loss Ps with Fe100-xCox-6.5wt%Si (x=0,1,3,5) magnetic core increases with the annealing temperature. The range of change is relatively small and the loss value is low.
The properties of powder have great influence on the DC performance of magnetic powder core. Adding a proper amount of Co can significantly improve the magnetic core AC and DC performance. Under the same frequency, the Fe95Co5-6.5wt%Si magnetic core has the highest effective permeability, and its loss is obviously lower than the Fe-6.5wt%Si magnetic core; while the Fe93Co7-6.5wt%Si magnetic core has a better direct current magnetic performance and its saturation magnetic induction intensity Bs=1.7179T.. The results show that Fe95Co5-6.5wt% Si core has excellent soft magnetic properties.
【學位授予單位】：中南大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM271.2
本文編號：2174526
[Abstract]:Fe-6.5wt% alloy has excellent soft magnetic properties. The magnetocrystalline anisotropy constant K1 is about half of the 3%Si-Fe alloy, the magnetostrictive coefficient is almost zero, and the iron loss is low. But because of its brittle and low hot working properties at room temperature, the cold rolling and conventional hot rolling methods are difficult to directly process the slab into thin strips or plates that can be applied to the actual application. Because of the high silicon content of the alloy (silicon as an anti magnetic material), the saturation magnetic induction intensity Bs of the ferrosilicon alloy is greatly reduced, and it is difficult to meet the high power capacity and small portable development requirements of the current instrument and equipment. Adding alloy element Co can significantly improve the saturation magnetic induction intensity of Fe-6.5wt%Si alloy Bs. In this study, Fe100-xCox-6.5wt%Si (x=0,1,3,5,7,10,15,35,50) alloy powder was successfully prepared by inert gas atomization and Fe100-xCox-6.5wt%Si magnetic powder core was prepared by subsequent process. The effects of powder preparation, insulation coating, annealing treatment and alloy composition on the properties of magnetic powder core were made. Research.
Under the condition that the alloy melt overheated 100-200 C and the atomization pressure was 6MPa, the Fe100-xCox-6.5wt%Si three element alloy powder was successfully prepared by adding Co element on Fe-6.5wt%Si based on the aerosol method. The results showed that the atomization technology was more stable, the composition of the atomized powder and the nominal composition were small, the carbon and oxygen content was low, and the sphericity of the particles was low. The surface light and clean satellite balls are small, and the size distribution of the Fe100-xCox-6.5wt%Si powder has a single peak distribution, and the atomized Fe100-xCox-6.5wt%Si powder has a -Fe phase structure. The independent characteristic peak of the ordered phase is not observed in the diffraction spectrum; the different Co content has different influence on the saturation magnetization of the Fe-6.5wt%Si alloy, and the saturation magnetization M of the Fe90Co10-6.5wt%Si alloy powder M The s value is the highest, and its Ms reaches 219.26emu/g.
The magnetic properties of the magnetic powder coated with the coupling agent and silicone resin insulating agent covered a thin layer of insulation. The magnetic properties of the magnetic powder core coated with the coupling agent + silicon resin and the Fe-6.5wt%Si magnetic powder core coated with the coupling agent + silicon resin were compared. The comprehensive properties of the magnetic powder core coated with the 1%ATPS coupling agent +4%DC-805 silicone resin were found. Better.
Because the size distribution of magnetic powder particles is not uniform, there are pores between particles, the density of magnetic powder core green is relatively low, and the densification degree is not high.
With the increase of annealing temperature, the coating agent of powder particles decreases gradually, but there is no obvious "ablation" phenomenon in the magnetic powder core section, and the surface insulation of magnetic powder remains relatively intact. The magnetic parameters of the magnetic powder core of different Co elements are different with the annealing temperature. During the annealing process at 400-800, the magnetic particles are magnetic. The core magnetic permeability U. is high in Fe100-xCox-6.5wt%Si (x=1,3,5) magnetic core and low in Fe100-xCox-6.5wt%Si (x=35,50), and the magnetic core coercive force Hc is low in Fe100-xCox-6.5wt%Si (x=0,1,3,5,7) magnetic core, and all reaches the valley value at 500 C. The magnetic core loss Ps with Fe100-xCox-6.5wt%Si (x=0,1,3,5) magnetic core increases with the annealing temperature. The range of change is relatively small and the loss value is low.
The properties of powder have great influence on the DC performance of magnetic powder core. Adding a proper amount of Co can significantly improve the magnetic core AC and DC performance. Under the same frequency, the Fe95Co5-6.5wt%Si magnetic core has the highest effective permeability, and its loss is obviously lower than the Fe-6.5wt%Si magnetic core; while the Fe93Co7-6.5wt%Si magnetic core has a better direct current magnetic performance and its saturation magnetic induction intensity Bs=1.7179T.. The results show that Fe95Co5-6.5wt% Si core has excellent soft magnetic properties.
【學位授予單位】：中南大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM271.2
【參考文獻】
相關(guān)期刊論文 前10條
1 林均品,鐘太彬,王艷麗,林志,陳國良;Ni含量對Fe_3Si基合金組織的影響[J];北京科技大學學報;2001年06期
2 ;Influence of Alloy Elements on Magnetic Properties of Fe-based Amorphous Alloys[J];Journal of Materials Science & Technology;2000年02期
3 王偉;馬天宇;羅偉;嚴密;;Co添加對快淬Fe-Si-Al合金結(jié)構(gòu)及磁性能的影響[J];稀有金屬材料與工程;2008年06期
4 金丹;孫可為;;工藝參數(shù)對鐵硅鋁磁粉芯性能的影響[J];磁性材料及器件;2008年04期
5 周本濂;材料制備中的非平衡過程[J];材料研究學報;1997年06期
6 李慶達;連法增;尤俊華;陳玉蘭;;降低軟磁鐵硅鋁磁粉芯損耗的研究[J];東北大學學報(自然科學版);2009年06期
7 朱盼星;張少明;徐駿;朱學新;趙新明;;氣霧化參數(shù)對316L不銹鋼粉末粒度的影響[J];粉末冶金材料科學與工程;2010年04期
8 潘麗梅,金吉男,林均品,王建國,王艷麗,林志,陳國良;硼元素對Fe-6.5%(質(zhì)量分數(shù))Si合金力學性能影響的試驗研究[J];功能材料;2004年06期
9 周琦;趙紅順;賈建剛;馬勤;鄒欣偉;;Fe_3Si基金屬間化合物的研究進展[J];甘肅科學學報;2007年04期
10 王世道,戴禮智;釩對Fe-Si合金有序相分解和性能的影響[J];金屬學報;1985年06期
，本文編號：2174526
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/2174526.html
教材專著
