机械球磨法制备纳米晶Zr粉及其燃烧性能  

Preparation of N anocrystalline Zr Powders by Mechanical Ball Milling and Their Burning Behavior

作　　者：杨帆[1] 康晓丽[1,2] 罗江山[1,2] 易勇[2] 唐永建[1,2] 

机构地区：[1]中国工程物理研究院激光聚变研究中心等离子体物理重点实验室,四川绵阳621999 [2]西南科技大学-中国工程物理研究院激光聚变研究中心极端条件物质特性联合实验室,四川绵阳621010

出　　处：《含能材料》2016年第1期91-95,共5页Chinese Journal of Energetic Materials

基　　金：国家自然基金项目(51306165);中国工程物理研究院科学技术发展基金(2013B0302052);西南科技大学-中国工程物理研究院激光聚变研究中心极端条件物质特性联合实验室开放基金资助(12zxjk01)

摘　　要：通过机械球磨法对微米Zr粉进行晶粒细化,采用X射线粉末衍射法分析了球磨时间对Zr粉的物相、晶粒尺寸及晶格应变大小的影响;采用扫描电镜和激光粒度分析仪对Zr粉形貌、粒径分布进行了表征,并研究了Zr粉球磨时间对Zr/KClO_4烟火剂光辐射时间特性的影响。结果表明:随着球磨时间的延长,Zr粉的颗粒尺寸先减小后增大,而晶粒尺寸则持续减小,同时晶格应变逐渐增大:当球磨时间为8 h时,Zr粉的粒径分布最均匀、平均粒径最小(0.8μm),晶粒尺寸为81.7 nm;球磨时间增加到20 h后,Zr粉的颗粒尺寸略有增大,但晶粒尺寸减小到最小值(15.4 nm)。对原料Zr粉进行球磨处理后,Zr/KClO_4烟火剂的光辐射时间缩短,球磨时间为8 h时,相比使用原料Zr粉的烟火剂,样品的光辐射时间(17 ms)缩短了32%,表明烟火剂燃烧速率的显著增加,并且峰值辐射强度增大。Different types of nanocrystalline Zr powders were produced by mechanical ball milling method. The effects of milling time on grain size and lattice strain of Zr powders were investigated using X-ray diffraction pattern （XRD）. The morphology characteristics and particle size distribution of Zr powders milled for different time were checked by scanning electron microscope （SEM） and Laser particle size analyzer （ LPSA）, as well as the influence of ball milling on the optical radiation time of Zr/KCIO4. Results show that increasing in milling time can reduce the grain size to nanoscale（15.4 nm after ball milling for 20 h） and in- crease the lattice strain. After ball milling for 8h, the size distribution of Zr powders are homogeneous with an minimum average particle size of 0.8 μm and grain size of 81.7 nm. The optical radiation time of Zr powders ball milling for 8 h is 17 ms, which shortened by 32% compared with that of raw Zr powders, and the peak intensity of optical radiation increases.

关 键 词：机械球磨 纳米晶Zr粉 Zr/KClO4烟火剂 光辐射时间 

分 类 号：TB383.3[一般工业技术—材料科学与工程] TG146.414[金属学及工艺—金属材料]