(西安交通大学材料科学与工程学院，西安710049)
摘 要: 定向地分析了孔隙含量、形状及其不同的位向关系在材料断裂过程中的行为，采用灰色系统方法处理试验数据，由此建立抗弯强度σbb与孔隙度θ间的数学方程:σbb=σ0e-βθ，式中σ0为材料孔隙度θ趋近于零时的归算抗弯强度值，β为表征孔隙形状及其位向关系的特征指数。所建立的方程式与实验值吻合较好。
关键字: 粉末冶金 多孔材料 灰色系统
POROSITY OF COPPER-GRAPHITE COMPOSITE
（School of Materials Science and Engineering,
Xi′an Jiaotong University, Xi′an 710049）
Abstract:The effects of pore in the composite on bending strength were studied. A grey equation was set up using grey system method to analyze the relation between porosityθand bending strengthσbbof the material, which isσbbσ0e-βθ,whereσ0is the limit bending strength asθtends toward zero, andβis a characteristic constant related to pore shape, pore size and pore orientation. The derived equation fits well with the experimental data.
Key words: powder metallurgy porous material grey system
