基于表面扩散机制金属纤维烧结的二维模型和三维重构（英文）  

2D Model and 3D Reconstitution of Sintered Metal Fibers by Surface Diffusion

作　　者：谌东东 郑洲顺[1] 王建忠[2] 汤慧萍[2] 

机构地区：[1]中南大学,湖南长沙410083 [2]西北有色金属研究院,金属多孔材料国家重点实验室,陕西西安710016

出　　处：《稀有金属材料与工程》2017年第6期1474-1479,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51174236,51134003);National Key Basic Research Development Program of China(“973”Program)(2011CB606306);Opening Project of State Key Laboratory of Porous Metal Materials(PMM-SKL-4-2012)

摘　　要：根据金属纤维烧结结点在不同方向的椭圆-椭圆结构,基于传统的表面扩散数学模型,建立了椭圆-椭圆模型。用水平集方法对模型进行数值求解,实现了金属纤维的二维模拟。此外,提出了三维重构方法描述烧结金属纤维复杂的三维几何结构。夹角为30°的2根金属纤维烧结的二维模拟和三维重构结果与实验结果相符,这说明本研究的二维模型和三维重构方法是正确的。另外,数值模拟结果表明:从2根金属纤维的钝角平分线方向到锐角平分线方向,烧结颈的生长速率增大。According to the sections of sintered junction of two metal fibers,which are oval-oval geometry structure in different directions,an oval-oval model was developed based on the traditional surface diffusion mathematical model.This model was numerically solved by a level set method to achieve the 2D simulations of two sintered metal fibers.Moreover,the 3D reconstitution method was proposed to depict the complex 3D geometrical structure of sintered junction.The 2D simulations and 3D reconstitution results of two metal fibers with the fiber angle 30° well agree with the experimental ones,which imply that the 2D model and 3D reconstitution method are correct.In addition,the numerical simulation results show that the growth rate of sintered neck along the directions taken from the bisector of obtuse angle to the bisector of acute angle is increased.

关 键 词：二维模型 三维重构 金属纤维 烧结颈 表面扩散 

分 类 号：TQ343.2[化学工程—化纤工业]