ni-zr-ti-nb-m渊m=sn,bi冤块体非晶合金的形成及其磁性能研究.pdf

下半月出版 Material Heat Treatment 材料热处理技术 Ni-Zr-Ti-Nb-M M=Sn,Bi冤块体非晶合金的形成 及其磁性能研究 郑许袁 杨元政袁 李青袁 谢致薇 (广东工业大学 材料与能源学院袁广东 广州 510006冤 摘 要院从共晶点 混合热 原子尺寸差和微合金化出发袁设计了Ni-Zr-Ti-Nb 体系具有较高玻璃形成能力的Ni 合金 成分袁用铜模吸铸法制备了直径2mm 的块体非晶合金袁用X 射线 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 热稳定性和磁学性遥 结果表明院微量Sn 的添加提高了合金的玻璃形成能力袁制备出了准2mm 的棒状完全非晶 试样曰Bi 不利于提高Ni-Zr-Ti-Nb 体系合金的玻璃形成能力遥 此外袁微量Sn 能使饱和磁感应强度稍有提高遥 关键词院镍 块体非晶合金曰玻璃形成能力曰软磁性能 中图分类号院TG 139.8 文献标识码院A 文章编号院 Glass Formation and Magnetic Properties of Ni-Zr-Ti-Nb-M (M=Sn,Bi) Bulk Glass Alloy ZHENG Xu, YANG Yuanzheng, LI Qing, XIE Zhiwei (Fac ulty of Materials and Ene rgy, Guangdong Unive rs ity of Technology, Guangzhou 510006, China) Abstract 院From the aspects of eutectic point, heat of mixing, atomic size difference and micro-alloying, Ni-Zr-Ti-Nb-M (M =Sn,Bi)alloys with high glass forming ability were designed. Bulk metallic glassy rods with the diameter of 2 mm were obtained by copper-mold vacuum suction casting. The microstructure, thermal stability and magnetic were observed by X-ray diffraction, differential scanning calorimetry and vibrating sample magnetometer, respectively, The results show that the micro-alloy element Sn can improve the glass forming ability (GFA) of Ni-Zr-Ti-Nb BMG system. Adding small amount of Bi is not beneficial for the GFA of the alloy system. The addition of Sn can slightly enhance the saturation magnetization( Ms)