摘要
通过改变球磨时间,获得不同粒度分布的钨粉颗粒,分析球磨时间对钨粉粒度分布和形貌特征的影响,提高粒度分布在目标区间(5~11μm)的钨粉颗粒体积分数。结果表明,球磨的前2 h对原料中大颗粒钨粉的影响较大,钨粉颗粒最大粒径由134μm迅速下降到20μm左右。随着球磨时间的增加,钨粉粒度分布指标减缓下降,除粒径变小外,颗粒形貌基本无变化,但是在球磨10 h后开始出现团聚现象。综合分析可知,球磨时间的改变对钨粉粒度分布指标影响较大,球磨时间为8 h时,可获得粒度分布最窄的钨粉颗粒,在目标区间的钨粉颗粒体积分数达到75%。
The tungsten particles in the different particle size distribution were obtained by changing the ball milling time to increase the volume fraction of tungsten particles in the objective particle size distribution of 5~11μm,and the influence of ball milling time on the particle size distribution and morphology of tungsten powders was analyzed.The results show that,the tungsten particle size decreases significantly in the initial ball milling for 2 h,and the maximum particle size decreases rapidly from 134μm to about 20μm.With the further increase of milling time,the typical particle size distribution parameters of tungsten powders decrease slowly.The morphology of tungsten powders does not change except the decrease of particle size.The agglomeration phenomenon appears after milling for 10 h.Comprehensive analysis shows that,the change of ball milling time has a great influence on the particle size distribution of tungsten powders.When the ball milling time is 8 h,the narrowest particle size distribution of tungsten powders is obtained,and the volume fraction of the tungsten particles in the objective particle size distribution reaches 75%.
作者
杨文涛
薛冰
代永富
蒲传金
肖定军
YANG Wen-tao;XUE Bing;DAI Yong-fu;PU Chuan-jin;XIAO Ding-jun(School of Environment and Resources,Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2021年第5期423-428,共6页
Powder Metallurgy Technology
基金
国家自然科学基金资助项目(11802255)
工程材料与结构冲击振动四川省重点实验室开放基金(18kfgk15)。
关键词
球磨时间
钨粉
粒度分布
形貌
milling time
tungsten powder
particle size distribution
morphology
