Gusev A I, Kurlov A S
Institute of Solid State Chemistry, Ural Division of the Russian Academy of Sciences, Ekaterinburg 620041, Russia.
Nanotechnology. 2008 Jul 2;19(26):265302. doi: 10.1088/0957-4484/19/26/265302. Epub 2008 May 19.
A model of high-energy ball milling of powders has been proposed. It is demonstrated that part of the energy is consumed for initiation of microstrains ε during milling and, hence, the process of the powder grinding is decelerated. An analytical expression has been deduced describing the size of nanocrystalline powder particles as a function of the milling time. The model and the experiment have been compared, using a powder of tungsten carbide (WC). The average size of the particles and the value of the microstrains in the ball-milled powder were determined by an x-ray method from broadening of diffraction reflections. The size of the particles was also evaluated using scanning electron microscopy and the sedimentation method.
提出了一种粉末高能球磨模型。结果表明，在球磨过程中部分能量用于引发微观应变ε，因此粉末研磨过程会减速。推导了一个解析表达式，描述了纳米晶粉末颗粒尺寸与球磨时间的函数关系。使用碳化钨（WC）粉末对该模型与实验进行了比较。通过X射线方法，根据衍射峰的展宽确定了球磨粉末中颗粒的平均尺寸和微观应变值。还使用扫描电子显微镜和沉降法评估了颗粒尺寸。
