摘要
采用等离子旋转电极雾化技术(PREP)制备球形钼及TZM钼合金粉末,利用激光粒度分析仪、氧氮分析仪、扫描电子显微镜(SEM)对粉末的粒径分布、氧含量、微观形貌、表面组织进行表征。结果表明:两种粉末的氧增量均小于50×10^(-6),粉末粒度集中分布在45~150μm呈单峰分布;TZM合金粉末实测中位粒径81.6μm小于Mo粉中位粒径102μm,且表面质量高、工艺性能(流动性、松装、振实密度)更优,这与TZM合金具有更小的表面张力,同时晶界处析出的第二相TiC等有关。该实验为增材制造用PREP法制备难熔金属粉末提供理论支持。
The spherical molybdenum and molybdenum alloy TZM powders were prepared by plasma rotary electrode atomization technology,and the particle size distribution,oxygen content,micromorphism and surface tissue of tungsten powder were characterized by laser particle size analyzer,O-N analyzer,scanning electron microscope(SEM).The results show that the oxygen increments of both powders are under 50×10^(-6),the powder particle size is concentrated in a single-peak distribution of 45-150μm.Because of the smaller surface tension of TZM,which has a smaller median particle size than Mo powder,and the powder has high surface quality and better process performance,which provides theoretical support for the evaluation of palladium and vanadium alloy powder for additive manufacturing.
作者
李晓辉
凤治华
孙念光
杨星波
LI Xiaohui;FENG Zhihua;SUN Nianguang;YANG Xingbo(Xi’an Sailong Metal Materials Co.,Ltd,Xi’an 710016,China)
出处
《粉末冶金工业》
北大核心
2024年第5期57-60,73,共5页
Powder Metallurgy Industry
关键词
等离子旋转电极
难熔金属
钼及钼合金粉
球形粉末
表面张力
plasma rotating electrode process
refractory metal
molybdenum and molybdenum alloy powders
spherical powder
surface tension
