摘要
采用射频等离子体法制备了高度球形化的TC4(Ti6Al4V)合金粉末。主要探究仪器送粉喷嘴高度、产生等离子体的功率、反应室的压力、原料粉体的粒度分布、送粉速率以及载气的气流速率等对于粉体球化率的影响。通过SEM图像观察粉体的形貌变化并计算粉体的球化率,利用XRD图谱测定球化前后粉体相结构。结果表明,通过观察球化粉末横截面可知粉末为实心球体且表面光滑,球化后粉末流动性明显提高,松装密度增大,粒度分布变窄,适合3D打印等应用技术对于合金粉体的要求。实验中,调节送粉喷嘴高度为12.5 cm,反应室压力为101.36 kPa,送粉速率为1.742 g/min,产生等离子气的功率为27.2 kW且控制原料粉体的粒度分布在38～63μm时,可使得球化率达到99%,明显高于其他球化粉末制备方法。
Highly spherical TC4(Ti-6 Al-4 V) powders were produced by a radio frequency plasma system. The influential parameters, namely position of the inlet nozzle, plasma plate power, chamber pressure, particle size distribution of raw materials, the feeding rate and the flow rate of the carrier gas were changed solo and the spheroidization ratio was counted with the help of SEM images. The phase structure and morphology of the powders were investigated by XRD and SEM. The results show that the observation of the surface and cross section of the spherical particle indicates that the particles are dense with a relatively smooth surface. Fluidity and bulk density are both improved to be suitable for practical application. Spheroidization ratio as high as 99% has been reached when the position of the inlet nozzle is 12.5 cm, the chamber pressure is 101.36 kPa, the powder feeding rate is 1.742 g/min, the plasma plate power is 27.2 kW and the particle size distribution of raw particles is around 38~63 μm.
作者
赵翀
麻朝阳
文子诚
曹永革
马冉
袁轩一
Zhao Chong;Ma Chaoyang;Wen Zicheng;Cao Yongge;Ma Ran;Yuan Xuanyi(Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices of Beijing,Renmin University of China,Beijing 100872,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第2期446-451,共6页
Rare Metal Materials and Engineering
基金
National Key Research and Development Program of China(2017YFB0403200)
