水雾化制备Fe-Si-B-C非晶软磁粉末及其晶化过程的研究  

Research on preparation and crystallization process of Fe-Si-B-C amorphous soft magnetic powder by water atomization

作　　者：覃思思[1,2] 李志[2] 王志勇[2] 谭澄宇[1] 曾克里[2] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]广州有色金属研究院,广东广州510651

出　　处：《粉末冶金工业》2015年第3期7-11,共5页Powder Metallurgy Industry

基　　金：广东省科技计划资助项目(2013B010403019)

摘　　要：采用水雾化方法制备了Fe-Si-B-C四元非晶合金粉末。研究了粉末的粒度分布、相结构、微观形貌、热稳定性以及基本软磁性能,并通过Kissinger峰移法计算了其晶化时所需的激活能。结果表明,通过水雾化方法制备的Fe-Si-B-C四元软磁粉末的粒度分布合理;粒径小于38μm的粉末为完全非晶结构,且粉末表面光滑,内部成分均匀;非晶粉末的初始结晶温度为542.15℃,且升温过程中存在2个晶化放热峰;2个晶化反应对应的晶化激活能分别为463.92 k J/mol和910.21 k J/mol;粉末的饱和磁感应强度和矫顽力分别为1.08 T和111.4 A/m。Fe-Si-B-C quaternary Fe-based amorphous compound powder was prepared successfully by water atomization.The particle size distribution,phase structure,morphology,thermal stability and basic soft magnetic properties were then studied.The crystallization process was also investigated using Kissinger＇ s method.The results indicate that the particle size distribution is reasonable and powders with particle size less than 38 μm are completely amorphous.Spherical particles have homogeneous internal composition,as well as smooth surface.DSC analysis shows that the crystallization temperature of the powders is about 542.15 ℃,and there are two crystallization exothermic peaks during heating process.Crystallization activation energy according to the two crystallization reactions is 463.92 kJ/mol and 910.21 kJ/mol.The saturation magnetic induction intensity and coercivity are 1.08 T and 111.4 A/m,respectively.

关 键 词：水雾化 非晶粉末 晶化激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]