Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 13    No. 5    October 2003

[PDF Download]        

    

Fractal phenomena in powder injection molding process
ZHENG Zhou-shun(郑洲顺)1,2, QU Xuan-hui(曲选辉)1,3,
LI Yun-ping(李云平)1,LEI Chang-ming(雷长明)1 ,
DUAN Bo-hua(段柏华)1

1. State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China;
2. School of Mathematical Science and Computing Technology,
Central South University, Changsha 410083, China;
3. School of Materials Science and Engineering,
University of Science and Technology Beijing, Beijing 100083, China

Abstract:The complicated characteristics of the powder were studied by fractal theory. It is illustrated that powder shape, binder structure, feedstock and mold-filling flow in powder injection molding process possess obvious fractal characteristics. Based on the result of SEM, the fractal dimensions of the projected boundary of carbonylic iron and carbonylic nickel particles were determined to be 1.074±0.006 and 1.230±0.005 respectively by box counting measurement. The results show that the fractal dimension of the projected boundary of carbonylic iron particles is close to smooth curve of one-dimension, while the fractal dimension of the projected boundary of carbonylic nickel particle is close to that of trisection Koch curve, indicating that the shape characteristics of carbonylic nickel particles can be described and analyzed by the characteristics of trisection Koch curve. It is also proposed that the fractal theory can be applied in the research of powder injection molding in four aspects.

 

Key words: powder injection molding; fractal theory; chaos; Navier-Stokes equation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com