Modeling sintering behavior of metal fibers with different fiber angles  

作　　者：Dong-Dong Chen Zhou-Shun Zheng Jian-Zhong Wang Hui-Ping Tang 

机构地区：[1]School of Mathematics and Statistics, Central South University [2]State Key Laboratory of Porous Metal Materials, Northwest Institute for Nonferrous Metal Research

出　　处：《Rare Metals》2018年第10期886-893,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51174236 and 51134003);the National Basic Research Program of China (No. 2011CB606306);the Opening Project of State Key Laboratory of Porous Metal Materials (No. PMM-SKL-4-2012)

摘　　要：The formation of sintering necks between two metal fibers was investigated using the oval-oval model with respect to the fiber angle range of 0°-90°. Surface diffusion was assumed to be the predominant mechanism in every section of the junction of two metal fibers in this model, which was addressed numerically using the level- set method. The growth rates of the sintering necks in the direction of the bisector of obtuse angle, the bisector of acute angle and the fiber axis were discussed in detail. It is found that the growth rate of the sintering necks decreases with fiber angle increasing in the direction of the fiber axis and the bisector of acute angle. However, an opposite variation in growth rate of sintering necks can be found in the direction of the bisector of obtuse angle. The numerical simulation results show that the growth rate of the sintering necks is significantly affected by the initial local geomet- rical structure which is determined by the fiber angle.The formation of sintering necks between two metal fibers was investigated using the oval-oval model with respect to the fiber angle range of 0°-90°. Surface diffusion was assumed to be the predominant mechanism in every section of the junction of two metal fibers in this model, which was addressed numerically using the level- set method. The growth rates of the sintering necks in the direction of the bisector of obtuse angle, the bisector of acute angle and the fiber axis were discussed in detail. It is found that the growth rate of the sintering necks decreases with fiber angle increasing in the direction of the fiber axis and the bisector of acute angle. However, an opposite variation in growth rate of sintering necks can be found in the direction of the bisector of obtuse angle. The numerical simulation results show that the growth rate of the sintering necks is significantly affected by the initial local geomet- rical structure which is determined by the fiber angle.

关 键 词：Metal fiber Surface diffusion Fiber angle Initial local geometrical structure Initial evolution speed 

分 类 号：TQ343.2[化学工程—化纤工业]