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从共晶点、混合热、原子尺寸差和微合金化出发,设计了Ni-Zr-Ti-Nb体系具有较高玻璃形成能力的Ni基合金成分,用铜模吸铸法制备了直径2mm的块体非晶合金,用X射线衍射仪、差热扫描量热仪和振动样品磁强计检测了样品的组织结构、热稳定性和磁学性。结果表明:微量Sn的添加提高了合金的玻璃形成能力,制备出了准2mm的棒状完全非晶试样;Bi不利于提高Ni-Zr-Ti-Nb体系合金的玻璃形成能力。此外,微量Sn能使饱和磁感应强度稍有提高。
Based on the eutectic point, heat of fusion, atomic size difference and micro-alloying, Ni-Zr-Ti-Nb system with high glass-forming ability was designed and Ni-based alloy was prepared. Bulk amorphous alloys were characterized by X-ray diffractometry, differential scanning calorimetry and vibrating sample magnetometer. The microstructure, thermal stability and magnetism of the samples were measured. The results show that the addition of trace amount of Sn improves the glass forming ability of the alloy and prepares a completely amorphous 2 mm rod specimen. Bi is not conducive to improve the glass forming ability of Ni-Zr-Ti-Nb alloy. In addition, a small amount of Sn makes the saturation magnetic flux intensity slightly increased.