Fe_(64.7)Co_6Cr_(2.3)Mo_(2.5)B_(5.5)C_7Si_(3.3)P_(8.7)块体非晶合金的磁致伸缩特性  

Magnetostriction of Fe_(64.7)Co_6Cr_(2.3)Mo_(2.5)B_(5.5)C_7Si_(3.3)P_(8.7) bulk amorphous alloy

作　　者：倪晓俊[1] 薄希辉[1] 李准[1] 刘迎春[1] 李德仁[1] 卢志超[1] 

机构地区：[1]中国钢研科技集团有限公司安泰科技股份有限公司,北京100081

出　　处：《功能材料》2017年第9期9180-9183,9188,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51071050)

摘　　要：采用铜模吸铸法制备了直径2mm的Fe_(64.7)Co_6Cr_(2.3)Mo_(2.5)B_(5.5)C_7Si_(3.3)P_(8.7)块体非晶合金,其玻璃转变温度T_g、超冷液相区间ΔTx(=T_(x1)-T_g)、约化玻璃转变温度T_(rg)(=T_g/Tl)和玻璃形成能力参数γ(=T_(x1)/(T_g+Tl))分别为754,25K、0.595和0.3855。利用真空热处理炉分别在733K(<T_g)、768K(T_g和T_(x1)之间)和803K(>T_(x1))温度对块体非晶合金进行了等温退火,采用自制的电容法磁致伸缩测量装置测试了不同退火状态下的磁致伸缩特性,显示该非晶合金淬态下饱和磁致伸缩系数λ_s为9×10^(-6),随着退火温度的升高λ_s出现了先增后减的变化,磁致伸缩曲线形状也发生先变窄后变宽的变化。在733K退火样品的软磁性能最好,饱和磁致伸缩系数λ_s(=12×10^(-6))最高。Bulk amorphous Alloy Fe64.7Co6Cr2.3Mo2.5B5.5C7Si3.3P8.7 with diameter of 2 mm has been prepared by copper mold upper suction casting method. The glass transition temperature Tg, supercooled liquid rigeon ATx （ = Tx1- Tg）, reduced glass transition temperature Trg （= Tg/T1） and glass-forming ability parameter （= Tx1 / （Tg＋T1）） were measured to be 754,25 K, 0.595 and 0.3855, respectively. The cast amorphous alloys were isothermal annealed at 733 K （〈Tg）, 768 K （between Tg and Tx1） and 803 K （〉Tx1） under vacuum condition and their magnetostriction properties were studied by self-made magnetostrictive measuring device of capacitance method. The results showed that the saturation magnetostriction λs of the cast amorphous alloy was the order of 9 × 10^-6. With the increase of annealing temperature from 733 to 803 K, the change of As increased first and then decreased, and the shape of the magnetostrictive curve becomes narrower first and the n wider. Soft magnetic properties and λs（=12×10^-6） of the samples became optimum under annealing of 733 K.

关 键 词：块体非晶合金 磁性能 磁致伸缩 

分 类 号：TG139.8[一般工业技术—材料科学与工程]