气水组合雾化制备不同粒径Fe−Si−B−Cr−C非晶合金粉末及性能研究  

Preparation and properties of Fe−Si−B−Cr−C amorphous alloy powders by air-water combination atomization with different particle sizes

作　　者：吕世雅 况春江 王磊 崔雷 张军 曹瑞 LÜ Shiya;KUANG Chunjiang;WANG Lei;CUI Lei;ZHANG Jun;CAO Rui(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Advanced Technology(Bazhou)Special Powder Co.,Ltd.,Bazhou 065701,China;Special Powder Atomization Technology Innovation Center of Hebei Province,Bazhou 065701,China)

机构地区：[1]东北大学材料科学与工程学院,沈阳110819 [2]安泰(霸州)特种粉业有限公司,霸州065701 [3]河北省特种粉体雾化技术创新中心,霸州065701

出　　处：《粉末冶金技术》2024年第6期638-644,共7页Powder Metallurgy Technology

基　　金：河北省科技重大专项(21281010Z);中央引导地方科技发展资金项目(236Z1029G)。

摘　　要：采用新型工业化气水组合雾化法制备六种粒度规格的FeSiBCrC非晶合金粉末,研究了粒度和退火温度对FeSiBCrC非晶磁粉芯性能的影响。结果表明:雾化粉末中值粒径(D_(50))≤25μm的FeSiBCrC合金粉末均为非晶态,过冷液相区宽度(ΔT)可达40℃,该成分非晶形成能力较强。非晶粉末的饱和磁化强度(Ms)和矫顽力(Hc)均随粒径的增加而增大,其中D_(50)=5μm,Ms=144.6 emu∙g^(‒1),Hc=1.8 Oe;D_(50)=30μm,Ms=152.6 emu∙g^(‒1),Hc=9.8 Oe。不同粒径非晶磁粉芯的磁导率(μe)在0.1~600.0 kHz频率范围内均具有良好的稳定性,且细粉相优于粗粉。所有非晶磁粉芯的磁损耗(Pc)均随着频率(f)增加而增大;粒径越细,退火对降低磁损耗效果越明显,其中D_(50)=5μm时下降了约84%,D_(50)=30μm时只下降了约30%;在500℃退火后,D_(50)=5μm非晶磁粉芯磁损耗达最低值,578 mW∙cm^(‒3)。FeSiBCrC amorphous alloy powders with different particle sizes were prepared by a new industrial gas-water atomization,and the effects of particle size and annealing temperature on the properties of the FeSiBCrC amorphous magnetic cores were investigated in this paper.The results show that the FeSiBCrC alloy powders with the median particle size(D_(50))≤25μm are all amorphous,and the width of the supercooled liquid phase region(ΔT)can reach 40℃,indicating the strong amorphous formation ability of the FeSiBCrC alloy powders.The saturation magnetization(Ms)and coercivity(Hc)of the amorphous powders increase with the increase of particle size.D_(50)=5μm,Ms=144.6 emu∙g^(‒1),and Hc=1.8 Oe;however,D_(50)=30μm,Ms=152.6 emu∙g^(‒1),and Hc=9.8 Oe.The permeability(μe)of the amorphous magnetic cores with different particle sizes has the good stability in the frequency range of 0.1~600.0 kHz,and the permeability of fine powders show better than that of the coarse powders.The magnetic loss(Pc)of all amorphous magnetic cores increases with the increase of frequency.The finer the particle size,the more obvious the effect of annealing on reducing the magnetic loss,which is decreased by about 84%at D_(50)=5μm,while is only decreased by about 30%at D_(50)=30μm.After annealing at 500℃,the magnetic loss of amorphous magnetic cores at D50=5μm reaches the minimum as 578 mW∙cm^(‒3).

关 键 词：粒径 非晶粉末 磁损耗 有效磁导率 

分 类 号：TF123[冶金工程—粉末冶金]