摘要
通过高能球磨法制备了纳米纯钨粉末。着重研究了过程控制剂、球料比以及球磨时间对钨粉的晶粒尺寸、形貌的影响。通过X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)对样品的结构、形貌进行了表征。研究结果表明:纳米纯钨粉末的最佳球磨参数为:5%(质量分数)过程控制剂(无水乙醇)、球料比约15∶1、球磨时间约50 h。在此参数下制备的粉末颗粒形状近似球状,其平均晶粒尺寸为15nm。
Pure W nanocrystalline powders were prepared by high energy ball milling(HEBM).The influences of process control agents(PCA),Ball-to-powders ratio and milling time on crystalline size,morphology of tungsten powders are investigated.The structure and morphology are studied by XRD and FE-SEM.The result showed that the optimal HEBM parameters are 5%wt PCA(anhydrous ethanol),ball-to-powders ratio 15∶1 and milling time 25h respectively.The milled powders show approximately spherical shape and its crystalline size reaches nearly 15nm under the optimum conditions.
出处
《粉末冶金工业》
CAS
北大核心
2011年第4期27-32,共6页
Powder Metallurgy Industry
基金
国际热核聚变实验堆(ITER)计划专项(2010GB109000)
关键词
钨
高能球磨
晶粒尺寸
球料比
tungsten
high-energy ball milling
crystalline size
ball-to-powders ratio