摘要
钨镍铜复合粉体作为破甲弹药型罩新材料,其烧结密度是影响性能稳定性的关键因素之一。本文通过对还原粉及不同球磨时间的超细粉进行粒度分布测量,分析了体分形维数应用的适用性;通过对还原粉和不同粒度分布的超细粉按质量比75∶25混合后进行烧结及其粒度分布测量,压坯烧结后进行密度测量,探究体分形维数对烧结密度的影响。结果表明:球磨4h以上的超细粉不适合用分形维数表征,钨镍铜粉的粒度分布对其烧结度有一定影响;还原粉与6h球磨粉按75∶25的比例混合时,钨镍铜混粉的烧结密度最高,为17.431g/cm^3,此时混粉的特征粒径为25.689μm,体分形维数为2.339。定量分析粒度分布对烧结密度的影响,得到在现有实验条件下最大烧结密度时的工艺参数,对进一步研究药型罩原料制备,提高破甲弹性能具有一定的参考作用。
The W-Ni-Cu composite powder is a kind of new material for the armor-piercing ammunition.Its sintered density is one of the key factors affecting the performance stability.In this paper,the particle size distribution of the reduced powder and ultrafine powder with different ball milling time is measured.The applicability of the application of fractal dimension is analyzed.The density of the compacted powder and the ultrafine powder with different particle size distribution are measured after 75∶25 mixing,as well as the particle size distribution.The effect of fractal dimension on sintering density was explored.The results show that it is not suitable to use the fractal dimension to characterize ultrafine powders longer than 4h.The particle size distribution of W-Ni-Cu powder has a certain influence on the sintering degree.When the original powder and the 6h ball mill are mixed in a ratio of 75∶25,the tungsten-nickel-copper powder has the highest sintered density of 17.431g/cm^3,and the characteristic particle size is 2.3386.Quantitative Analysis of the particle size distribution of the sintered density,the process parameters at a maximum density in current sintering experimental conditions,provide some reference for further study of preparation for liner feedstock and improvement of heat performance.
作者
白志明
刘志阳
高道仪
杨云川
BAI Zhiming;LIU Zhiyang;GAO Daoyi;YANG Yunchuan(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2018年第6期17-20,55,共5页
Journal of Shenyang Ligong University
基金
辽宁省大学生创新创业训练计划项目(201710144043)
关键词
钨镍铜复合粉
体分形维数
粒度分布
烧结密度
W-Ni-Cu composite powder
fractal dimension
particle size distribution
sintered density
