球磨改性和表面活性剂添加对超细98W-1Ni-1Fe粉末性能的影响
来源期刊：中国有色金属学报2012年第12期
论文作者：韩勇 范景莲 刘涛 成会朝 高扬 田家敏
文章页码：3409 - 3415
关键词：超细98W-1Ni-1Fe；球磨改性；表面活性剂；粉末性能
Key words：ultrafine 98W-1Ni-1Fe; ball milling modification; surfactant; powder properties
摘 要：采用XRD、SEM、BET、Zeta电位等分析手段研究球磨改性时间和表面活性剂硬脂酸(SA)添加对注射成形用超细98W-1Ni-1Fe粉末性能的影响。结果表明：球磨改性使得粉末晶粒细化而晶格应变逐渐增大，且表面活性剂SA的添加加剧了这种变化趋势。同时，球磨改性起到了很好地消除超细粉末团聚、提高松装密度的作用，而SA的添加使得粉末的粒径分布更加均匀且松装密度更高。Zeta电位值变化表明：球磨改性使得粉末颗粒间相互排斥力增大，有利于粉末的稳定分散，且不产生二次团聚。
Abstract: The effect of ball milling modification time and surfactant addition on the properties of ultrafine 98W-1Ni-1Fe used for powder injection molding was investigated by XRD, SEM, BET and Zeta potential methods. The results indicate that the grain is refined while the lattice strain increases with the elongation of ball milling modification time, and the addition of stearic acid (SA) intensifies this changing trend. At the same time, the ball milling modification effectively eliminates the aggregation and increases the loose packed density, meanwhile, the addition of SA makes the particle size distributing more homogeneous, and the loose packed density is improved. The change of Zeta potential shows that the ball milling modification intensifies the repulsive force between powder particles, leading to stable dispersion without secondary aggregation.
韩 勇，范景莲，刘 涛，成会朝，高 扬，田家敏
(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要：采用XRD、SEM、BET、Zeta电位等分析手段研究球磨改性时间和表面活性剂硬脂酸(SA)添加对注射成形用超细98W-1Ni-1Fe粉末性能的影响。结果表明：球磨改性使得粉末晶粒细化而晶格应变逐渐增大，且表面活性剂SA的添加加剧了这种变化趋势。同时，球磨改性起到了很好地消除超细粉末团聚、提高松装密度的作用，而SA的添加使得粉末的粒径分布更加均匀且松装密度更高。Zeta电位值变化表明：球磨改性使得粉末颗粒间相互排斥力增大，有利于粉末的稳定分散，且不产生二次团聚。
关键词：超细98W-1Ni-1Fe；球磨改性；表面活性剂；粉末性能
HAN Yong, FAN Jing-lian, LIU Tao, CHENG Hui-zhao, GAO Yang, TIAN Jia-min
(State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China)
Abstract:The effect of ball milling modification time and surfactant addition on the properties of ultrafine 98W-1Ni-1Fe used for powder injection molding was investigated by XRD, SEM, BET and Zeta potential methods. The results indicate that the grain is refined while the lattice strain increases with the elongation of ball milling modification time, and the addition of stearic acid (SA) intensifies this changing trend. At the same time, the ball milling modification effectively eliminates the aggregation and increases the loose packed density, meanwhile, the addition of SA makes the particle size distributing more homogeneous, and the loose packed density is improved. The change of Zeta potential shows that the ball milling modification intensifies the repulsive force between powder particles, leading to stable dispersion without secondary aggregation.
Key words:ultrafine 98W-1Ni-1Fe; ball milling modification; surfactant; powder properties
