摘要
以Fe_(84)B_(6)P_(6)C_(3)Cu_(1)非晶合金为基础,系统研究了热处理工艺参数对合金晶化行为、电阻率ρ以及软磁性能的影响规律。结果表明,当退火温度位于第一晶化峰开始温度T_(x1)和第二晶化峰开始温度T_(x2)之间时,α-Fe晶粒的形核速率随退火温度的升高而增大,晶粒尺寸随退火温度的升高而减小。α-Fe晶粒尺寸的细化和体积分数的增加有利于合金条带的矫顽力H_(c)降低,饱和磁通密度B_(s)和有效磁导率μ_(e)提高。ρ随退火温度的变化规律表明,结构弛豫退火会使合金ρ轻微下降,但是α-Fe晶粒的析出会使合金ρ快速降低,而Fe_(3)(B, P)化合物相的析出会导致合金ρ的再次快速增大。通过对合金条带在不同温度和时间退火后的软磁性能和显微结构研究发现,退火温度的升高会增大软磁性能对退火时间的敏感性,即缩短合金条带的最佳退火时间范围,合金在420、450和480℃的最长最佳退火时间分别为60、30和6 min。总的来说,Fe_(84)B_(6)P_(6)C_(3)Cu_(1)纳米晶合金在420℃退火30 min后表现出了优异的综合软磁性能,其B_(s)、H_(c)和μ_(e)分别为1.81 T、6.7 A/m和8 600。
The effect of heat treatment process parameters on crystallization behavior, electrical resistivity ρ and soft magnetic properties of Fe_(84)B_(6)P_(6)C_(3)Cu_(1)amorphous alloy ribbon was investigated. It was discovered that when annealing temperature is between the onset temperature of first crystallization peak T_(x1)and second one T_(x2), high annealing temperature is conducive to promote the nucleation and hinder the growth of α-Fe grains, which is helpful to reduce the coercivity H_(c) and elevate the saturation magnetic flux density B_(s)and effective permeability μ_(e). The evolution of ρ with annealing temperature shows that structural relaxation annealing will slightly reduce the ρ of alloy, but the precipitation of α-Fe grains rapidly decreases the ρ, while the precipitation of Fe_(3)(B, P) compounds will lead to the rapid increase of ρ again. It was found that the sensitivity of soft magnetic properties to annealing time enhances with the increase of annealing temperature, i. e., high annealing temperature corresponds to short optimal annealing time, and the maximum optimal annealing time of the alloy at 420 ℃, 450 ℃ and 480 ℃ is 60 min, 30 min and 6 min, respectively. Generally, Fe_(84)B_(6)P_(6)C_(3)Cu_(1)nanocrystalline alloy shows excellent comprehensive soft magnetic properties when annealing at 420 ℃ for 30 min. Its B_(s),H_(c)and μ_(e)are 1.81 T, 6.7 A/m and 8 600, respectively.
作者
李育洛
沈宁宁
陈莉
吕旷
惠希东
LI Yuluo;SHEN Ningning;CHEN Li;LU Kuang;HUI Xidong(Western Metal Materials Co.,Ltd.,Xi'an 710201,Shaanxi,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China)
出处
《金属功能材料》
CAS
2022年第6期37-44,共8页
Metallic Functional Materials
基金
国家重点研发专项资助项目(2016YFB0300502)。
关键词
铁基纳米晶合金
软磁性能
热处理工艺
电阻率
Fe-based nanocrystalline alloy
soft magnetic properties
heat treatment process
electrical resistivity
