胡可,杨世松,邹黎明,韩胜利,崔利群,刘辛.粉末粒形对钨粉末注射成形喂料流变性能的影响[J].稀有金属材料与工程,2020,49(10):3472~3478.[Hu Ke,Yang Shisong,Zou Liming,Han Shengli,Cui Liqun,Liu Xin.Effect of Powder Shape on Rheological Properties of Tungsten Feedstocks for Metal Powder Injection Molding[J].Rare Metal Materials and Engineering,2020,49(10):3472~3478.]
粉末粒形对钨粉末注射成形喂料流变性能的影响
投稿时间:2019-10-08  修订日期:2019-11-06
中文关键词:  图像分析技术  粉末注射成形    粉末粒形  流变性能
基金项目:广东省国际合作专项(2018A050506010);广东省重大科技专项(2018B090904004);广东省科学院实施创新驱动发展能力建设专项(2018GDASCX-0963);广州市国际合作专项(201907010030);广东省科学院建设国内一流研究机构行动专项资金项目(2019GDASYL-0105077);广州市科技项目(201906040007)
中文摘要:
      本文采用图像法定量表征了钨粉的粒形与粒度,研究了粉末粒形对钨粉末注射成形喂料流变性能的影响。结果表明:窄粒径钨粉(NPW)与球形钨粉(SW)粒度基本一致;SW比NPW具有更好的球形度、表面光滑度以及分散度。采用相同的有机粘结剂,SW的粉末装载量为64%,高于NPW的59%。与NPW相比,SW喂料表现出更优异的流动性能,具有更低的流动行为指数和粘流激活能,更适合注射成形。粉末粒形影响钨MIM喂料的流变性能主要源于粘结剂与粉末颗粒以及颗粒与颗粒之间的相互作用特性。
Effect of Powder Shape on Rheological Properties of Tungsten Feedstocks for Metal Powder Injection Molding
英文关键词:image analysis method  powder injection molding  tungsten  particle shape  rheological property
英文摘要:
      In this paper, the particle shape and size of tungsten powders were quantitatively analyzed by image analysis technology, and the effect of particle shape on the rheological properties of tungsten feedstocks for metal powder injection molding (MIM) was alao investigated. The results showed that the particle size of narrow particle-sized tungsten (NPW) powder was almost the same as that of spherical tungsten (SW) powder. In contrast to NPW powders, the SW powders exhibited better sphericity, surface smoothness and dispersion. Mixing with the same binder, the solid loading of SW powders was 64%, which was higher than that of 59% of the NPW powders. The SW feedshocks showed better flow performance, i.e., lower flow behavior index and flow activation energy, and it thus was more suitable for injection molding. Particle shape affects the rheology of tungsten MIM feedstocks by changing the nature of organic binder–particle and particle–particle interactions.
作者单位E-mail
胡可 广东省科学院 广东省材料与加工研究所 kehuscut@gmail.com 
杨世松 广东省科学院 广东省材料与加工研究所  
邹黎明 广东省科学院 广东省材料与加工研究所  
韩胜利 广东省科学院 广东省材料与加工研究所  
崔利群 广东省科学院 广东省材料与加工研究所  
刘辛 广东省科学院 广东省材料与加工研究所 shaneliu118@163.com 
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