Microstructure and Magnetic Properties in Fe61Co9−xZr8Mo5WxB17 (0 ≤ x ≤ 3) Glasses and Glass-Matrix Composites
Microstructure and Magnetic Properties in Fe61Co9−xZr8Mo5WxB17 (0 ≤ x ≤ 3) Glasses and Glass-Matrix Composites
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DOI：
10.1007/s11661-008-9706-z
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发表时间：
2009-01
期刊：
影响因子：
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通讯作者：
Wen Wang;Wen Wang;W. Zhang;A. Gebert;S. Roth;C. Mickel;Ludwig Schultz
中科院分区：
文献类型：
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作者：
Wen Wang;Wen Wang;W. Zhang;A. Gebert;S. Roth;C. Mickel;Ludwig Schultz
通过对Fe 61 Co 9 − xZr 8 Mo 5 W xB 17（0 ≤x≤ 3）快淬薄带和直径为2 mm的铜模铸造圆柱体的系统研究，试图揭示钨对铁基非晶形成体微观结构和磁性能的影响。结果表明，所有快淬薄带均为完全非晶，其特征间距δ a随钨含量（cW）的增加而增大。随着cW的增加，铸态气缸体中的析出相由铁磁相（Fe_（23）Zr_6 + Fe_（22）Zr + Fe_（22）B + Fe_（88）B）+ α-Fe转变为铁磁相（ZrB_（12）+W_（22）B_5）+ α-Fe。在铸造和退火过程中形成的沉淀物的平均特征距离δ c随cW的增加而增加，与薄带的δ a一致。对于所制备的薄带和圆柱体，第一次晶化的温度和热（Tp 1和ΔH1）也随cW的增加而增加。所制备的薄带和圆柱体的磁化强度和居里温度随着cW的增加而降低，而所制备的样品的磁化强度明显依赖于铸造过程中析出相的体积分数（CP）。这些结果表明，钨可以调节铁基玻璃过冷熔体中富铁结构单元的面心立方/随机密堆积（fcc/rcp）和体心立方（bcc）结构单元的比例。
By systematically investigating the Fe61Co9−xZr8Mo5WxB17(0 ≤x≤ 3) melt-spun ribbons and copper-mold cast cylinders with 2-mm diameter, we attempt to discover the effect of tungsten on the microstructure and magnetic properties of the Fe-based glass formers. It was found that all as-spun ribbons are fully amorphous and their characteristic distanceδahas an increasing tendency with tungsten content (cW). The precipitates in the as-cast cylinders change from the ferromagnetic phases (Fe23Zr6+ Fe2Zr + Fe2B + Fe8B) plusα-Fe to the nonmagnetic phases (ZrB12+ W2B5) plusα-Fe with increasingcW. The averaged characteristic distanceδcof the precipitates formed in the casting and annealing processes increases withcW, consistent with theδaof the ribbons. The temperature and heat of the first crystallization for the as-prepared ribbons and cylinders (Tp1and ΔH1) also increase withcW. The magnetization and Curie temperature of the as-prepared ribbons and cylinders decrease withcW, while the coercivity of the as-prepared samples is obviously dependent on the volume fraction of the precipitates formed in the casting process (CP). These results indicate that tungsten can tune the fractions of the face-centered-cubic/random-close-packed (fcc/rcp) and body-centered-cubic (bcc) Fe-rich structural units in the undercooled melts of the Fe-based glasses.