还原钴粉末的分形描述  

Fractal Dimensions of Reduced Cobalt Powder Particle Profiles

作　　者：郑洲顺[1] 曲选辉[1,2] 李云平[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室 [2]北京科技大学,北京100083

出　　处：《稀有金属材料与工程》2004年第4期393-396,共4页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展规划项目(G2000067203);国家杰出青年科学基金项目(50025412);高等学校博士学科点专项科研基金资助项目(99053310)

摘　　要：分析了粉末注射成形中常用的还原钴粉末颗粒形状、投影边界、表面的分形特征.介绍了适用于测量粉末分形结构的构造步长法,给出1种用分形几何语言更精确地定量描述粉末特性的方法.用内转式构造步长法计算了还原钴粉末颗粒边界的分形维数,得出其分形维数的取值范围在1.116 ～1.122之间.为粉末注射成形工艺过程的控制提供了更精确的材料参数.The fractal characteristics of reduced cobalt powders for Powder Injection Molding (PIM), such as powder shape, projection border, and powder surface, are studied. A simple and suitable method which can be used to measure the dimensions of the fractal structure of particle profiles is introduced. An accurate quantitative method for characterizing powders for PIM using fractal geometric nomenclature is given. From the scanning electron micrograph, the fractal dimensions of the projected profile of reduced cobalt powders are calculated using the 'In Swing Structured Walk' technique. Fractal dimensions obtained were in the range of 1.116 to 1.122.

关 键 词：粉末注射成形 颗粒形状 分形维数 构造步长法 

分 类 号：TF12[冶金工程—粉末冶金]