杨星波,汤慧萍,朱纪磊,贺卫卫,杨广宇,李晓辉.氧化镧的加入对PREP制备钨粉末性能的影响[J].稀有金属材料与工程,2022,51(8):3025~3030.[Yang Xingbo,Tang Huiping,Zhu Jilei,Hei Weiwei,Yang Guangyu,Li Xiaohui.The influence of lanthanum oxide on the properties of PREP tungsten powder[J].Rare Metal Materials and Engineering,2022,51(8):3025~3030.]
氧化镧的加入对PREP制备钨粉末性能的影响
投稿时间:2021-07-17  修订日期:2021-08-02
中文关键词:  等离子旋转电极雾化  钨镧  粉末缺陷  表面张力  粒度  
基金项目:科学挑战专题项目(项目号TZ2018006)
中文摘要:
      采用等离子旋转电极雾化技术(plasma rotating electrode processing,PREP)制备出纯W和W-La合金球形粉末,对比分析了两种类型粉末的化学成分、形貌、物理性能、缺陷和粒度分布。结果表明:PREP法制备的球形纯W粉末表面光滑、球形度高,小于106 μm粉末的收得率为70%。在棒料中加入La2O3后,大部分La2O3在PREP过程中挥发,残余的La2O3优先附着于液滴表面,降低了的液态金属钨的表面张力,将小于106μm粉末的收得率提升至90%;但是,表面张力的降低同时也导致W-La合金粉末表面出现少量缺陷。La2O3提高粉末收率的现象为研究提高PREP技术粉末收率提供了新思路。
The influence of lanthanum oxide on the properties of PREP tungsten powder
英文关键词:Plasma rotating electrode atomization  Tungsten Lanthanum  Powder defect  Surface Tension  particle size distribution  
英文摘要:
      In this paper, pure tungsten (W) and tungsten lanthanum(W-La) spherical powders were prepared by using plasma rotating electrode atomization powder technology (PREP). The chemical composition, morphology, physical properties, defects and particle size distribution of the two types of powders were compared and analyzed. The results show that the spherical pure W powder prepared by the PREP method has a smooth surface and high sphericity, and the yield of powders smaller than 106 μm is 70%.Most of the La2O3 volatilizes during the PREP process after adding to the bar,and the remaining La2O3 preferentially adheres to the surface of the droplet, which reduces the surface tension of liquid metal tungsten and increases the yield of powders smaller than 106μm to 90%. However, the decrease in surface tension also causes a small number of defects on the surface of the W-La powder. The phenomenon of La2O3 increasing the powder yield provides a new idea for the study of improving the powder yield of PREP technology.
作者单位E-mail
杨星波 西安赛隆金属材料有限责任公司 yangxingbo0706@163.com 
汤慧萍 西北有色金属研究院 金属多孔材料国家重点实验室 thpfys@126.com 
朱纪磊 西安赛隆金属材料有限责任公司  
贺卫卫 西安赛隆金属材料有限责任公司  
杨广宇 西北有色金属研究院 金属多孔材料国家重点实验室  
李晓辉 西安赛隆金属材料有限责任公司  
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