论文部分内容阅读
在悬浮熔炼装置上采用玻璃包熔的净化处理工艺,可使Nd—Fe—B—Si合金熔体获得凝固前的深过冷,实验结果表明:随着过冷度的增加,枝晶形态由树枝晶向胞晶转变,并且是突发性的;该合金获得最大无量纲过冷度θ≥0.3。用X射线衍射分析表明;在深过冷Nd—Fe—B—Si合金的凝固组织中存在着亚稳相。
In the smelting plant, the melting process of glass cladding is used to make the Nd-Fe-B-Si alloy melt obtain deep undercooling before solidification. The experimental results show that with the undercooling increasing, The dendrite transitions to a cellular crystal and is sudden; this alloy achieves the maximum dimensionless undercooling θ ≥ 0.3. X-ray diffraction analysis shows that there is a metastable phase in the solidified microstructure of the deep undercooled Nd-Fe-B-Si alloy.