發(fā)布時間：2018-03-07 12:02

  本文選題：鐵硅硼　切入點：軟磁復(fù)合材料　出處：《稀有金屬材料與工程》2017年04期 　論文類型：期刊論文

【摘要】：將FeSiB非晶帶材通過粉末冶金的方法制備成軟磁復(fù)合材料。研究了鈍化劑溶劑、質(zhì)量分數(shù)及退火溫度對材料形貌及性能的影響。采用乙醇作為磷酸鈍化液的溶劑,并與水及丙酮溶劑對比。結(jié)果表明,水為溶劑時磁粉易被氧化;丙酮沸點低揮發(fā)快導(dǎo)致磷酸與磁粉反應(yīng)不充分;乙醇為溶劑時能夠形成均勻致密的磷酸鹽包覆層,有利于降低復(fù)合材料的損耗。對于采用乙醇作為溶劑時磷酸質(zhì)量分數(shù)(0.2%~0.8%)影響的研究表明,當磷酸質(zhì)量分數(shù)為0.6%時,可獲得最低損耗187 mW/cm~3(50 kHz,50 mT)。去應(yīng)力退火溫度低于400℃時,復(fù)合材料內(nèi)應(yīng)力不能充分釋放,導(dǎo)致磁導(dǎo)率低且損耗高。退火溫度高于425℃時,在保溫過程中α-Fe相析出產(chǎn)生晶化。Fe Si B軟磁復(fù)合材料在400℃/1 h退火后可獲得最佳磁性能。
[Abstract]:Soft magnetic composites were prepared by powder metallurgy of FeSiB amorphous strip. The effects of passivator solvent, mass fraction and annealing temperature on the morphology and properties of the material were studied. Ethanol was used as the solvent of phosphoric acid passivation solution. Compared with water and acetone solvent, the results show that the magnetic powder is oxidized easily when water is the solvent, the low boiling point of acetone leads to insufficient reaction of phosphoric acid with magnetic powder, and the homogeneous and dense phosphate coating layer can be formed when ethanol is used as solvent. The study on the effect of phosphoric acid mass fraction (0.2g / 0.8g) using ethanol as solvent shows that when the phosphoric acid mass fraction is 0.6, the lowest loss can be obtained by 187 mW/cm~3(50 / Hz ~ (50 Mt / L). When the annealing temperature is lower than 400 鈩，

本文編號：1579212