Effects of cooling rate on microstructures and magnetic properties of Nd–Fe–B alloys
Effects of cooling rate on microstructures and magnetic properties of Nd–Fe–B alloys
复制标题
冷却速率对Nd-Fe-B合金显微组织和磁性能的影响
DOI：
10.1016/s0925-8388(03)00461-4
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
T. Motegi
中科院分区：
文献类型：
--
作者：
S. Ozawa;T. Saito;T. Motegi
采用X射线衍射仪、扫描电子显微镜、差示扫描量热仪和振动样品磁强计对快速凝固工艺制备的NdFeB合金的组织和磁性能进行了研究。采用金属型铸造和熔体旋压两种快速凝固工艺，研究了冷却速度对NdFeB合金显微组织和磁性能的影响。采用金属型铸造技术，以较高的冷却速度(S，3.3×10 2~1.2×10 3K，α−1)制备出Nd2Fe14B等轴晶和Nd2Fe14B枝晶。在较高的冷却速度下(S−1~1.5×10 6K S−1)，采用熔体旋压法制备的Nd2Fe14B合金具有细小的等轴晶Nd2Fe14B和非晶相。确定了NdFeB合金的冷却速度、显微组织和矫直力之间的关系。
The microstructures and magnetic properties of Nd–Fe–B alloys produced by rapid solidification processing techniques were examined by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, and in a vibrating sample magnetometer. Two rapid solidification processing techniques, metallic mold casting and melt-spinning, were used to investigate the influences of cooling rates on the microstructure and magnetic properties of the Nd–Fe–B alloys. The Nd–Fe–B alloys had equiaxed Nd2Fe14B grains together with α-Fe dendrites when produced by the metallic mold casting technique with moderately high cooling rates (3.3×102to 1.2×103K s−1). The Nd–Fe–B alloys had fine equiaxed Nd2Fe14B grains with or without amorphous phase when produced by the melt-spinning technique with high cooling rates (4.3×105K s−1to 1.5×106K s−1). The relationships among the cooling rate, microstructure, and coercivity of the Nd–Fe–B alloys were determined.
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y