High-performance alloyed In metal-bonded magnets produced from Zn/Sm2Fe17Nx powders
High-performance alloyed In metal-bonded magnets produced from Zn/Sm2Fe17Nx powders
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DOI：
10.1063/1.373333
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发表时间：
2000-05-01
影响因子：
3.2
通讯作者：
Adachi, G
中科院分区：
文献类型：
--
作者：
Machida, K;Noguchi, K;Adachi, G
在1.4 GPa、460 K、1.4 MA m（-1）的条件下，通过添加适量的In金属粉末，由表面包覆的细粉末Zn/Sm_2Fe_（17）Nx（x= 3）成型rho=约6.5 g cm（-3）的合金化In金属结合磁体。所得的具有共晶组成的In-Zn合金用作金属粘合剂，并且降低的熔点负责改善Sm 2Fe 17 Nx颗粒沿着所施加的磁场方向的有效排列以用于粘结磁体。获得了以下高性能的磁特性：（BH）（max）=类似于151 kJ m（-3），B-r=类似于0.96 T，H-cj=类似于0.72 MA m（-1）。In-Zn金属结合Sm 2Fe 17 Nx磁体由于In-Zn共晶合金的有效表面包覆而显示出良好的热稳定性、良好的抗氧化性和高致密化。在273至393 K的温度范围内测量的可逆通量损失的温度依赖性提供了α（B-r）=-0.06%K-1的热系数。(C)2000年美国物理学会。[S0021-8979（00）21808-2]。
Alloyed In metal-bonded magnets with rho=similar to 6.5 g cm(-3) were molded from surface-coated fine powders, Zn/Sm2Fe17Nx (x=similar to 3), under conditions of 1.4 GPa, similar to 460 K, and 1.4 MA m(-1) by adding an appropriate amount of In metal powder. The resulting In-Zn alloy with an eutectic composition served as the metal binder and the lowered melting point was responsible for improving the effective alignment of the Sm2Fe17Nx particles along a direction of the applied magnetic field for the bonded magnets. The following high-performance magnetic characteristics were attained: (BH)(max)=similar to 151 kJ m(-3), B-r=similar to 0.96 T, and H-cj=similar to 0.72 MA m(-1). In-Zn metal-bonded Sm2Fe17Nx magnets showed good thermal stability, good oxidation resistance, and high densification due to effective surface coating by the In-Zn eutectic alloy. The temperature dependence of reversible flux losses measured over temperatures from 273 to 393 K provided a thermal coefficient of alpha(B-r)=-0.06 % K-1. (C) 2000 American Institute of Physics. [S0021-8979(00)21808-2].