中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 23 No. 4 April 2013 |
（1. State Key Laboratory of Porous Metal Materials,
Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China;
2. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:The FeCrAl fiber was used to prepare porous metal materials with air-laid technology, and then followed by sintering at 1300 °C for a holding period of 2 h in the vacuum. In addition, a novel fractal soft, which was developed based on the fractal theory and the computer image processing technology, was explored to describe the pore structure of porous metal materials. Furthermore, the fractal dimension of pore structure was calculated by the soft and the effects of magnification and porosity on fractal dimension were also discussed. The results show that the fractal dimension decreases with increase in the magnification, while it increases continuously with the porosity enhancing. The interrelationship between the fractal dimension and the magnification or porosity can be presented by the equation of D=α0exp(-x/α1)+α2 and D=k2-(k1-k2)/[1+exp((θ-k0)/k3)], respectively.
Key words: porous metal materials; FeCrAl fiber; fractal dimension; porosity; magnification
